CN101404478B - Method and apparatus for improving efficiency of class E power amplifier - Google Patents
Method and apparatus for improving efficiency of class E power amplifier Download PDFInfo
- Publication number
- CN101404478B CN101404478B CN2008101683908A CN200810168390A CN101404478B CN 101404478 B CN101404478 B CN 101404478B CN 2008101683908 A CN2008101683908 A CN 2008101683908A CN 200810168390 A CN200810168390 A CN 200810168390A CN 101404478 B CN101404478 B CN 101404478B
- Authority
- CN
- China
- Prior art keywords
- efficient
- series connection
- power amplifier
- power
- capacitive reactance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000006698 induction Effects 0.000 claims description 86
- 238000005259 measurement Methods 0.000 claims description 39
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000003321 amplification Effects 0.000 description 35
- 238000003199 nucleic acid amplification method Methods 0.000 description 35
- 239000003990 capacitor Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 206010019133 Hangover Diseases 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Landscapes
- Amplifiers (AREA)
Abstract
The embodiment of the invention discloses a method and a device for improving the efficiency of E class power amplifiers. The method includes: A. the efficiency of a power amplifier before and after regulating parallel capacitive reactance are respectively obtained; B. according to the regulated efficiency of the power amplifier before and after regulating parallel capacitive reactance, the parallel capacitive reactance is adjusted; the steps A and B are repeated until the efficiency of the power amplifier does not increase and series connection capacitive reactance and/or series connection inductance are adjusted; C. the efficiency of the power amplifier before and after regulating the series connection capacitive reactance and/or inductance are respectively adjusted; D. the series connection capacitive reactance and/or inductance are adjusted according to the efficiency gained in the step C; the steps C and D are repeated until the efficiency of the power amplifier does not improve.The embodiment of the invention adjusts the parallel capacitive reactance as well as the series connection capacitive reactance and/or inductance by monitoring the efficiency of the power amplifier before and after the adjustment until the efficiency does not improve any more, thus improving the efficiency of the E class power amplifiers.
Description
Technical field
The present invention relates to electronic communication field, be specifically related to a kind of method and device of the E of raising power-like amplifier efficient.
Background technology
Along with wireless communication industry constantly develops, people have expressed higher expectation to wireless communication technology, have higher requirement.Improve constantly the efficient of transceiver in the wireless communication system, reduce the main direction of studying that its power consumption becomes wireless communication technology.And the afterbody of radio receiving-transmitting unit to be the power consumption of power amplifier accounted for more than 60% of whole system power consumption, if the efficient of the high power amplifier that can effectively carry then must make the performance of whole system obtain very big improvement.In 1975, you (Sokal) proposed E power-like amplifier model cable clamp, and it can realize 100% operating efficiency in theory, and high-efficient characteristic makes the E power-like amplifier become at present one of focus of power amplifier research in the world.
Yet, in actual applications,, can only reach about 70% even lower level because various factors causes E power-like amplifier real work efficient to reduce.Therefore, the amplification efficient that how to improve the E power-like amplifier is the problem that people pay close attention to always.
Summary of the invention
In view of this, the invention provides method and the device that a kind of E of raising power-like amplifier amplifies efficient.
For achieving the above object, the embodiment of the invention provides following technical scheme:
A kind of method that improves E power-like amplifier efficient comprises:
A, respectively obtain adjust before the capacitive reactance in parallel and adjust capacitive reactance in parallel after the efficient of power amplifier;
Whether B, the efficient of judging the power amplifier after the described adjustment capacitive reactance in parallel are higher than the efficient of adjusting the power amplifier before the capacitive reactance in parallel, if be higher than, according to the capacitive reactance in parallel of adjustment trend adjustment before; If be not higher than, adjust capacitive reactance in parallel according to the direction opposite with before adjustment trend;
Repeating step A, B adjust series connection capacitive reactance and/or series connection induction reactance after the efficient of power amplifier no longer improves;
C, respectively obtain adjust before series connection capacitive reactance and/or the induction reactance and adjust the series connection capacitive reactance and/or series connection induction reactance after the efficient of power amplifier;
Whether D, the efficient of judging the power amplifier after described adjustment series connection capacitive reactance and/or the series connection induction reactance are higher than the efficient of adjusting the power amplifier before series connection capacitive reactance and/or the series connection induction reactance, if be higher than, according to adjustment trend adjustment series connection capacitive reactance and/or series connection induction reactance before; If be not higher than, according to direction adjustment series connection capacitive reactance opposite and/or series connection induction reactance with before adjustment trend;
Repeating step C, D no longer improve until the efficient of power amplifier.
A kind of E power-like amplifier comprises:
Power supply input power measurement module is used to measure the power supply input power of power amplifier;
The output power measurement module is used to measure the power output of power amplifier;
The efficiency calculation module is used for the efficient according to described power supply input power measurement module and described output power measurement module calculating power amplifier;
The control adjusting module, comprise: judge module, whether the efficient that is used to judge the power amplifier after the described adjustment capacitive reactance in parallel is higher than the efficient of adjusting the power amplifier before the capacitive reactance in parallel, and whether the efficient of judging the power amplifier after described adjustment series connection capacitive reactance and/or the series connection induction reactance is higher than the efficient of adjusting the power amplifier before series connection capacitive reactance and/or the series connection induction reactance; Adjusting module, be used for when described judge module judges that the efficient of the power amplifier after adjusting capacitive reactance in parallel is higher than the efficient of the power amplifier before adjusting capacitive reactance in parallel, according to the capacitive reactance in parallel of adjustment trend adjustment before, efficient until power amplifier no longer improves, when described judge module judges that the efficient of the power amplifier after adjusting capacitive reactance in parallel is not higher than the efficient of the power amplifier before adjusting capacitive reactance in parallel, adjust capacitive reactance in parallel according to the direction opposite, no longer improve until the efficient of power amplifier with before adjustment trend; Then when described judge module judges that efficient after adjusting series connection capacitive reactance and/or series connection induction reactance is higher than the efficient of the power amplifier before adjusting series connection capacitive reactance and/or series connection induction reactance, according to adjustment trend adjustment series connection capacitive reactance and/or series connection induction reactance before, efficient until power amplifier no longer improves, when described judge module judges that the efficient of the power amplifier after adjusting series connection capacitive reactance and/or series connection induction reactance is not higher than the efficient of the power amplifier before adjusting series connection capacitive reactance and/or series connection induction reactance, according to direction adjustment series connection capacitive reactance opposite and/or series connection induction reactance, no longer improve until the efficient of power amplifier with before adjustment trend.
A kind of transmitter comprises above-mentioned E power-like amplifier.
A kind of base station comprises above-mentioned E power-like amplifier.
As seen, the technical scheme that the embodiment of the invention provides, before relatively adjusting capacitive reactance in parallel, adjust capacitive reactance in parallel with the efficient of adjusted power amplifier, relatively adjust before series connection capacitive reactance and/or the series connection induction reactance and the efficient adjustment series connection capacitive reactance of adjusted power amplifier and/or series connection induction reactance, no longer improve up to efficient, thereby improved the efficient of E power-like amplifier.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit theory diagrams of E power-like amplifier;
Fig. 2 is the equivalent switch circuit theory diagrams of E power-like amplifier;
Fig. 3 is the circuit theory schematic diagram of the E power-like amplifier of the embodiment of the invention one elaboration;
Fig. 4 is the circuit theory schematic diagram of the E power-like amplifier of the embodiment of the invention two elaborations;
Fig. 5 is the circuit theory schematic diagram of the E power-like amplifier of the embodiment of the invention three elaborations;
Fig. 6 amplifies the method flow diagram of efficient for a kind of E of adjustment power-like amplifier that the embodiment of the invention provides.
Embodiment
See also shown in Figure 1ly, Fig. 1 is the circuit theory diagrams of E power-like amplifier.The E power-like amplifier partly is made up of power supply, transistor AND gate laod network etc.
The E power-like amplifier still uses transistor as amplifying device, so the dissipation power of transistor collector becomes the principal element that influences the power amplifier operating efficiency.Transistor works on off state in desirable E power-like amplifier model, transistor collector voltage and collector current can not appear in its rational laod network simultaneously, be that the collector electrode dissipation power is zero, transistor does not consume dc energy in the course of the work, and therefore desirable E power-like amplifier operating efficiency is 100%.Generally in desirable E power-like amplifier model, ignore transistorized inner parameter, change-over time for example, electric capacity etc. between withstand voltage, knot, and be perfect switch with its equivalence.
See also shown in Figure 2ly, Fig. 2 is the equivalent switch circuit theory diagrams of E power-like amplifier.Among the figure, L
RFCBe high frequency choke coil; L and C constitute series resonant tank, also are filter circuit; C
PBe equivalent parallel electric capacity, it is the summation of transistor input capacitance, distributed capacitance and external capacitor; R
LBe load.Input signal is pumping signal, and the state of control switch S is so switching frequency is fundamental frequency.High frequency choke coil L
RFCAC signal is presented very big impedance, make switch disconnect or when closed source current violent variation can not take place, promptly source current is a galvanic current stream, this is to carry out the prerequisite hypothesis of this model theory when pushing over.The equivalent parallel capacitor C
PEffect be the voltage waveform of adjusting collector electrode, collector voltage is risen late at the switch opening time delay, avoid overlapping with the hangover of collector current.Collector voltage becomes the sinusoidal wave that contains fundamental component under the effect of laod network.Other harmonic components of LC series resonant tank filtering allows fundamental frequency signal pass through, and makes load R
LThe signal of end is that frequency is the sinusoidal signal of fundamental frequency, and the amplitude of this output signal directly links together with supply voltage, and the adjustment supply voltage just can obtain corresponding amplification effect.
The principle of the embodiment of the invention is based on the capacitive reactance in parallel of adjusting the E power-like amplifier, adjusts the efficient that series connection capacitive reactance and/or series connection induction reactance improve the E power-like amplifier.
The capacitive reactance in parallel of E power-like amplifier and output reactance are very big to the power output and the effectiveness affects of E power-like amplifier, there are certain linear in power output, efficient with capacitive reactance in parallel, power output is less than direct current power, wherein, direct current power can be calculated by the direct current and the supply voltage of current supply circuit.Efficient then can calculate by power output and direct current power, specifically can be that power output just equals efficient divided by direct current power.Be in a certain span in capacitive reactance in parallel and output reactance but work as power output and direct current power, both ratio is near 1, and promptly efficient is 100%.Therefore, if in a certain scope according to the size of certain trend adjustment capacitive reactance in parallel, adjust the size of output reactance again, efficient just can reach a maximum.When continuation is adjusted the value of capacitive reactance in parallel or output reactance toward the direction identical with original adjustment trend, efficient will reduce gradually, promptly when adjusting capacitive reactance in parallel, output reactance, efficient has a maximum so when adjusting above-mentioned parameter, in order to improve the efficient of E power-like amplifier, need find out this maximum.
Embodiment one
See also shown in Figure 3,
The electric capacity of the transistor collector parallel connection of power-like amplifier
Be the electric capacity of connecting, L with the transistor collector of power amplifier
1Be the inductance of connecting with the transistor collector of power amplifier.Wherein, C
1With C
2Can be the anti-device of Adjustable Capacity.L
1And C
2Constitute series resonant tank.L
RFCIt is choking-winding, one end is connected with power supply, and the other end is connected with transistorized collector electrode, and its effect is that perfectly straight stream signal intercepts AC signal, the input I of E class power amplification circuit can link to each other with signal source, and the output O of E class power amplification circuit can link to each other with external loading.
The capacitive reactance in parallel of E power-like amplifier can be adjustable shunt capacitance C
1Value, the series connection capacitive reactance can be series capacitance C in the series resonant circuit
2Value, series connection induction reactance can be inductance L in the series resonant circuit
1Value, output reactance can be meant series capacitance C
2With series inductance L
1Equivalence value.
Among Fig. 3, power input at the E power-like amplifier also is connected with power supply input power measurement circuit, output at the E power-like amplifier also is connected with the output power measurement circuit, the other end of described power supply input power measurement circuit and output power measurement circuit links to each other with the efficiency calculation module, the efficiency calculation module obtains the efficient of power amplifier according to power supply input power measurement circuit and output power measurement circuit, the efficiency calculation module links to each other with the control adjusting module, the efficient of the power amplifier that calculates is sent to the control adjusting module, the control adjusting module can comprise judge module and two submodules of adjusting module, control adjusting module and tunable capacitor C in parallel
1And series connection tunable capacitor C
2Be connected.
Power supply input power measurement module can be made up of current sampling resistor, operational amplifier and modulus switching device in the present embodiment.Current sampling resistor changes into voltage with electric current, and operational amplifier amplifies the voltage on the sampling resistor to be fit to the scope of application of back modulus switching device, and modulus switching device is converted into digital voltage with aanalogvoltage.
The output power measurement module can be made up of coupler, power detector and modulus switching device in the present embodiment.Coupler takes out the sub-fraction power of high-power RF signal, and power detector changes into direct voltage with radio-frequency power, and modulus switching device is converted into digital voltage with aanalogvoltage.
The power supply input power measurement module of present embodiment is used to measure the power supply input power of power amplifier; The output power measurement module is used to measure the power output of power amplifier; The efficiency calculation module is used for the efficient according to described power supply input power measurement module and described output power measurement module calculating power amplifier; The control adjusting module be used for before the adjustment that obtains according to the described efficiency calculation module capacitive reactance in parallel and adjust capacitive reactance in parallel after the efficient of power amplifier, adjust capacitive reactance in parallel, no longer improve until the efficient of power amplifier; Before adjustment series connection capacitive reactance that obtains according to described efficiency calculation module and/or the series connection induction reactance and adjust the efficient of the power amplifier after series connection capacitive reactance and/or the induction reactance, adjust series connection capacitive reactance and/or induction reactance, no longer improve until the efficient of power amplifier.Judge module is used to judge whether the efficient of the power amplifier after the described adjustment capacitive reactance in parallel is higher than the efficient of adjusting the power amplifier before the capacitive reactance in parallel, and whether the efficient of judging the power amplifier after the described adjustment series connection capacitive reactance is higher than the efficient of adjusting the power amplifier before series connection capacitive reactance and/or the series connection induction reactance.Adjusting module then is used for when described judge module judges that the efficient of the power amplifier after adjusting capacitive reactance in parallel is higher than the efficient of the power amplifier before adjusting capacitive reactance in parallel, according to the capacitive reactance in parallel of adjustment trend adjustment before, efficient until power amplifier no longer improves, when described judge module judges that the efficient of the power amplifier after adjusting capacitive reactance in parallel is not higher than the efficient of the power amplifier before adjusting capacitive reactance in parallel, adjust capacitive reactance in parallel according to the direction opposite, no longer improve until the efficient of power amplifier with before adjustment trend; When the efficient after described judge module is judged adjustment series connection capacitive reactance is higher than the efficient of the power amplifier before adjustment series connection capacitive reactance and/or the series connection induction reactance, according to adjustment trend adjustment series connection capacitive reactance and/or series connection induction reactance before, efficient until power amplifier no longer improves, when described judge module judges that the efficient of the power amplifier after adjusting the series connection capacitive reactance is not higher than the efficient of the power amplifier before adjusting series connection capacitive reactance and/or series connection induction reactance, according to the direction adjustment series connection capacitive reactance opposite, no longer improve until the efficient of power amplifier with before adjustment trend.
Referring to Fig. 3, the adjusting module of present embodiment is at first adjusted C
1, adjust C for the first time
1The time can be to adjust at random according to the step-length that presets, promptly can increase earlier, also can reduce earlier, step-length that normal conditions preset is selected less value, in order to avoid change the excessive maximum that is difficult to find power amplification efficiency, adjusts C
1The behind efficiency computing module calculates the efficient of adjusted power amplifier, if judge module is judged the efficient height of the efficient of this moment than the power amplifier before adjusting, then adjusts C before the explanation
1Direction be to adjust towards the direction that power amplification efficiency increases, then adjusting module continues to adjust towards this direction, adjusts C if judge module is judged
1After efficient unlike the efficient height of power amplifier before adjusting, then the adjustment direction before the expression is not to adjust towards the direction that power amplification efficiency increases, but adjust towards the direction that power amplification efficiency reduces, then this moment, adjusting module should be toward adjusting with the opposite direction of the direction of adjusting before, i.e. Zhi Qian adjustment is to increase next time that to adjust then be to reduce, and is to reduce that to adjust then be to increase next time before.Till the maximum that finds power amplification efficiency, promptly adjust power amplification efficiency again and also no longer increased.When having adjusted C
1After, need to continue to adjust C
2, need reach maximum power output at output O point, can be the C that adjusts in the series resonant circuit
2, can improve the efficient of E class power amplifier, adjust C
2Method with adjust C
1Method identical, repeat no more herein.
Judging that power amplification efficiency no longer increases, promptly find the maximum of power amplification efficiency that multiple feasible method can be arranged, for example, can be the threshold value that presets a power amplification efficiency, when reaching this threshold value, just thinks the maximum that has found power amplification efficiency.Also can be to preestablish an adjustment time,, just stop to adjust when arriving this adjustment during the time according to the scope of regulating.Can also be in course of adjustment, the adjustment direction that power amplification efficiency reduces under the mark (as reduces the direction of capacitive reactance in parallel, or increase the direction of capacitive reactance in parallel) and corresponding power amplification efficiency value, in adjustment process subsequently, adjust directions when all underlined when two, stop to adjust, the maximum efficiency value that is write down promptly is considered as the maximum of the power amplification efficiency that finds, can judge that power amplification efficiency no longer increases simultaneously.
Present embodiment passes through the efficient of monitoring power amplifier to C
1And C
2Adjust, improved the efficient of E power-like amplifier.
Embodiment one has set forth a kind of to shunt capacitance C
1And series capacitance C
2Adjust the circuit of the efficient that improves power amplifier, embodiment two sets forth a kind of to shunt capacitance C
1And inductance L
1Adjust the circuit of the efficient that improves power amplifier.
Embodiment two
See also shown in Figure 4, C among Fig. 4
1Be the electric capacity in parallel, C with the transistor collector of E power-like amplifier
2Be the electric capacity of connecting, L with the transistor collector of power amplifier
1Be the inductance of connecting with the transistor collector of power amplifier.Wherein, C
1Be adjustable capacitive reactance device, L
1It is adjustable induction reactance device.L
1And C
2Constitute series resonant tank.L
RFCBe choking-winding, an end is connected with power supply, and the other end is connected with transistorized collector electrode, and its effect is that perfectly straight flow resistance is every interchange.The input I of E power-like amplifier can link to each other with signal source, and the output O of E power-like amplifier can link to each other with load.
Among Fig. 4, power input at the E class A amplifier A also is connected with power supply input power measurement circuit, output at the E class amplification circuit also is connected with the output power measurement circuit, the other end of described power supply input power measurement circuit and output power measurement circuit links to each other with the efficiency calculation module, the efficiency calculation module obtains the efficient of power amplifier according to power supply input power measurement circuit and output power measurement circuit, the efficiency calculation module links to each other with the control adjusting module, the efficient of the power amplifier that calculates is sent to the control adjusting module, the control adjusting module can comprise judge module and two submodules of adjusting module, control adjusting module and tunable capacitor C in parallel
1And series connection controllable impedance L
1Be connected.Judge module is used to judge whether the efficient of the power amplifier after the described adjustment capacitive reactance in parallel is higher than the efficient of adjusting the power amplifier before the capacitive reactance in parallel, and whether the efficient of judging the power amplifier after the described adjustment series connection induction reactance is higher than the efficient of adjusting the power amplifier before series connection capacitive reactance and/or the series connection induction reactance.Adjusting module is used for when described judge module judges that the efficient of the power amplifier after adjusting capacitive reactance in parallel is higher than the efficient of the power amplifier before adjusting capacitive reactance in parallel, according to the capacitive reactance in parallel of adjustment trend adjustment before, efficient until power amplifier no longer improves, when described judge module judges that the efficient of the power amplifier after adjusting capacitive reactance in parallel is not higher than the efficient of the power amplifier before adjusting capacitive reactance in parallel, adjust capacitive reactance in parallel according to the direction opposite, no longer improve until the efficient of power amplifier with before adjustment trend; When the efficient after described judge module is judged adjustment series connection induction reactance is higher than the efficient of the power amplifier before adjusting series connection induction reactance, according to adjustment trend adjustment series connection capacitive reactance and/or series connection induction reactance before, efficient until power amplifier no longer improves, when described judge module judges that the efficient of the power amplifier after adjusting series connection induction reactance is not higher than the efficient of the power amplifier before adjusting series connection induction reactance, according to the direction adjustment series connection induction reactance opposite, no longer improve until the efficient of power amplifier with before adjustment trend.
Referring to Fig. 4, the adjusting module of present embodiment is at first adjusted C
1, adjust C for the first time
1The time can be to adjust at random according to the step-length that presets, promptly can increase earlier, also can reduce earlier, step-length that normal conditions preset is selected less value, in order to avoid change the excessive maximum that is difficult to find power amplification efficiency, adjusts C
1The behind efficiency computing module calculates the efficient of adjusted power amplifier, if judge module is judged the efficient height of the efficient of this moment than the power amplifier before adjusting, then adjusts C before the explanation
1Direction be to adjust towards the direction that power amplification efficiency increases, then continue towards this direction adjustment, adjust C if judge module is judged
1After efficient unlike the efficient height of power amplifier before adjusting, then the adjustment direction before the expression is not to adjust towards the direction that power amplification efficiency increases, but adjust towards the direction that power amplification efficiency reduces, then this moment, adjusting module should be adjusted toward the opposite direction of the direction of adjusting before, be to increase that to adjust then be to reduce next time before promptly, be to reduce that to adjust then be to increase next time before.Till the maximum that finds power amplification efficiency, promptly adjust power amplification efficiency again and also no longer increased.When having adjusted C
1After, need to continue to adjust L
1, need reach maximum power output at output O point, can be the L that adjusts in the series resonant circuit
1, can improve the efficient of E class power amplifier, adjust L
1Method with adjust C
1Method identical, repeat no more herein.
Present embodiment passes through the efficient of monitoring power amplifier to C
1And L
1Adjust, improved the efficient of E power-like amplifier.
Embodiment two has set forth a kind of to shunt capacitance C
1And inductance L
1Adjust the circuit of the efficient that improves power amplifier, embodiment three sets forth a kind of to shunt capacitance C
1After adjusting, continue to adjust C
2And L
1, the circuit of the efficient of raising power amplifier.
Embodiment three
See also shown in Figure 5, C among Fig. 5
1Be the tunable capacitor in parallel, C with the transistor collector of E power-like amplifier
2Be the tunable capacitor of connecting, L with the transistor collector of power amplifier
1Be the controllable impedance of connecting with the transistor collector of power amplifier.L
1And C
2Constitute series resonant tank.L
RFCBe choking-winding, an end is connected with power supply, and the other end is connected with transistorized collector electrode, and its effect is that perfectly straight flow resistance is every interchange.The input I of E power-like amplifier can link to each other with signal source, and the output O of E power-like amplifier can link to each other with load.
Among Fig. 5, power input at the E class A amplifier A also is connected with power supply input power measurement circuit, output at the E class amplification circuit also is connected with the output power measurement circuit, the other end of described power supply input power measurement circuit and output power measurement circuit links to each other with the efficiency calculation module, the efficiency calculation module obtains the efficient of power amplifier according to power supply input power measurement circuit and output power measurement circuit, the efficiency calculation module links to each other with the control adjusting module, the efficient of the power amplifier that calculates is sent to the control adjusting module, the control adjusting module can comprise judge module and two submodules of adjusting module, control adjusting module and tunable capacitor C in parallel
1, series connection tunable capacitor C
2And series connection controllable impedance L
1Be connected.Judge module is used to judge whether the efficient of the power amplifier after the described adjustment capacitive reactance in parallel is higher than the efficient of adjusting the power amplifier before the capacitive reactance in parallel, and whether the efficient of judging the power amplifier after described adjustment series connection capacitive reactance and the series connection induction reactance is higher than the efficient of adjusting the power amplifier before series connection capacitive reactance and the series connection induction reactance.Adjusting module is used for when described judge module judges that the efficient of the power amplifier after adjusting capacitive reactance in parallel is higher than the efficient of the power amplifier before adjusting capacitive reactance in parallel, according to the capacitive reactance in parallel of adjustment trend adjustment before, efficient until power amplifier no longer improves, when described judge module judges that the efficient of the power amplifier after adjusting capacitive reactance in parallel is not higher than the efficient of the power amplifier before adjusting capacitive reactance in parallel, adjust capacitive reactance in parallel according to the direction opposite, no longer improve until the efficient of power amplifier with before adjustment trend; When the efficient after series connection capacitive reactance and series connection induction reactance are adjusted in described judge module judgement is higher than the efficient of the power amplifier before adjustment series connection capacitive reactance and the series connection induction reactance, according to adjustment trend adjustment series connection capacitive reactance and series connection induction reactance before, efficient until power amplifier no longer improves, when described judge module judges that the efficient of the power amplifier after adjusting series connection capacitive reactance and/or series connection induction reactance is not higher than the efficient of the power amplifier before adjusting series connection capacitive reactance and series connection induction reactance, according to direction adjustment series connection capacitive reactance opposite and/or series connection induction reactance, no longer improve until the efficient of power amplifier with before adjustment trend.
Referring to Fig. 5, the adjusting module of present embodiment is at first adjusted C
1, adjust C for the first time
1The time can be to adjust at random according to the step-length that presets, promptly can increase earlier, also can reduce earlier, step-length that normal conditions preset is selected less value, in order to avoid change the excessive maximum that is difficult to find power amplification efficiency, adjusts C
1The behind efficiency computing module calculates the efficient of adjusted power amplifier, if judge module is judged the efficient height of the efficient of this moment than the power amplifier before adjusting, then adjusts C before the explanation
1Direction be to adjust towards the direction that power amplification efficiency increases, then continue towards this direction adjustment, adjust C if judge module is judged
1After efficient unlike the efficient height of power amplifier before adjusting, then the adjustment direction before the expression is not to adjust towards the direction that power amplification efficiency increases, but adjust towards the direction that power amplification efficiency reduces, then this moment, adjusting module should be adjusted toward the opposite direction of the direction of adjusting before, be to increase that to adjust then be to reduce next time before promptly, be to reduce that to adjust then be to increase next time before.Till the maximum that finds power amplification efficiency, promptly adjust power amplification efficiency again and also no longer increased.When having adjusted C
1After, need to continue to adjust L
1And C
2, need reach maximum power output at output O point, can be the L that adjusts in the series resonant circuit
1And C
2, really the efficient of raising E class power amplifier is adjusted C
2Method with adjust C
1Method identical, repeat no more herein.Adjust L herein
1And C
2The order branch of priority not, adjustment earlier which can.
Present embodiment passes through the efficient of monitoring power amplifier to C
1, C
2And L
1Adjust, improved the efficient of E power-like amplifier.
Top embodiment sets forth several circuit that can improve the efficient of E power-like amplifier, sets forth a kind of method that improves E power-like amplifier efficient below.
Embodiment four
Present embodiment is set forth a kind of method that improves E power-like amplifier efficient, is elaborated below in conjunction with accompanying drawing.
See also shown in Figure 6ly, Fig. 6 is a kind of method flow diagram that improves E power-like amplifier efficient, comprising:
Step 601: obtain before the adjustment capacitive reactance in parallel respectively and the efficient of the power amplifier after the adjustment capacitive reactance in parallel;
Can be the power output of measuring the E power-like amplifier by the output power measurement module, for example can be to use the power output of coupler and detecting circuit detection E power-like amplifier, and the sampling of process modulus obtains the power output of power amplifier.
It can be the direct current that detects current supply circuit by power supply input power measurement module; If supply voltage is known, calculate the power supply input power according to known voltage, calculate then and amplify efficient; If supply voltage is unknown, detect input voltage according to voltage detecting circuit and calculate the power supply input power, calculate then and amplify efficient.Above-mentioned input power measurement module can be to comprise current detection circuit and voltage detecting circuit, detects the direct current and the power input voltage of current supply circuit respectively.
Obtain the efficient of adjusting the power amplifier before the capacitive reactance in parallel promptly need obtain power amplifier this moment earlier before will adjusting capacitive reactance in parallel efficient, so that as the foundation of follow-up adjustment capacitive reactance in parallel.
Obtaining the efficient of adjusting the power amplifier after the capacitive reactance in parallel promptly is after having adjusted capacitive reactance in parallel, need obtain adjusting the efficient of back power amplifier, certainly, the capacitive reactance in parallel of adjustment herein can be the first capacitive reactance in parallel of adjusting, and also can be the pilot process of adjusting capacitive reactance in parallel.
The efficient of power amplifier can be that the power output with detected power amplifier obtains divided by the power supply input power.
Step 602:, adjust capacitive reactance in parallel according to before the described adjustment capacitive reactance in parallel and adjust the efficient of the power amplifier after the capacitive reactance in parallel;
According to before the described adjustment capacitive reactance in parallel and adjust the efficient of the power amplifier after the capacitive reactance in parallel, adjust capacitive reactance in parallel and be meant that the efficient that will adjust the preceding power amplifier of back and adjustment compares, if the efficient of adjusted power amplifier increases, then continue according to the capacitive reactance in parallel of adjustment trend adjustment before, if the efficient of adjusted power amplifier does not increase, then will be according to adjusting capacitive reactance in parallel with adjustment trend opposite tendency before.
No longer improve until efficient herein and just seek a maximum efficiency, when making that efficient reaches maximum, then no longer carry out the adjustment of capacitive reactance in parallel.
According to before described adjustment series connection capacitive reactance and/or the series connection induction reactance and adjust the efficient of the power amplifier after series connection capacitive reactance and/or the series connection induction reactance, adjust the series connection capacitive reactance and/or series connection induction reactance specifically can be:
Whether the efficient of judging the power amplifier after the described adjustment capacitive reactance in parallel is higher than the efficient of adjusting the power amplifier before the capacitive reactance in parallel, if be higher than, according to the capacitive reactance in parallel of adjustment trend adjustment before; If be not higher than, adjust capacitive reactance in parallel according to the direction opposite with before adjustment trend.
Step 603: repeating step 601 and step 602 are adjusted series connection capacitive reactance and/or series connection induction reactance after the efficient of power amplifier no longer improves;
If judge in the step 603 until amplify efficient no longer improve after stop adjustment to capacitive reactance in parallel.
Adjust series connection capacitive reactance and/or series connection induction reactance in the step 603 and be meant the first adjustment of having adjusted after the capacitive reactance in parallel the connect capacitive reactance and/or the induction reactance of connecting, its method of adjustment can be to adjust at random according to the step-length that presets, promptly can increase earlier, also can reduce earlier, the step-length that normal conditions preset is selected less value, in order to avoid change the excessive maximum that is difficult to find power amplification efficiency.
Step 604: obtain before adjustment series connection capacitive reactance and/or the series connection induction reactance respectively and the power amplification efficiency after adjustment series connection capacitive reactance and/or the series connection induction reactance;
Identical in the method for obtaining power amplification efficiency in the step 604 and the step 601, repeat no more herein.
Because the series resonant circuit of forming by the series connection capacitive reactance and the induction reactance of connecting that links to each other with output in the E power-like amplifier, increase in the constant clear Kangxu's power output of power supply input power as making, be that efficient increases, then need to adjust the value of series connection capacitive reactance and/or series connection induction reactance, because these two devices have correlation, can be to adjust one of them device, also can be the combination of adjusting them.
Step 605:, adjust series connection capacitive reactance and/or series connection induction reactance according to before described adjustment series connection capacitive reactance and/or the series connection induction reactance and adjust the efficient of the power amplifier after series connection capacitive reactance and/or the series connection induction reactance;
Can be to adjust the series connection capacitive reactance separately to make the efficient of power amplifier improve, also can be to adjust series connection induction reactance separately to make the efficient of power amplifier improve herein, can also be that the combination of adjusting series connection capacitive reactance and series connection induction reactance makes the efficient of power amplifier improve.
According to before described adjustment series connection capacitive reactance and/or the series connection induction reactance and adjust the efficient of the power amplifier after series connection capacitive reactance and/or the series connection induction reactance, adjust the series connection capacitive reactance and/or series connection induction reactance specifically can be:
Whether the efficient of judging the power amplifier after described adjustment series connection capacitive reactance and/or the series connection induction reactance is higher than the efficient of adjusting the power amplifier before series connection capacitive reactance and/or the series connection induction reactance, if be higher than, according to adjustment trend adjustment series connection capacitive reactance and/or series connection induction reactance before; If be not higher than, according to direction adjustment series connection capacitive reactance opposite and/or series connection induction reactance with before adjustment trend.
Step 606: repeating step 604 and step 605 no longer improve until the efficient of power amplifier.
Think that promptly the power amplifier of this moment has had maximum efficient, then should stop the step of all adjustment if judge in the step 606 that the efficient of power amplifier can not improve again.
Present embodiment is adjusted capacitive reactance in parallel by the efficient of E power-like amplifier is monitored, and adjusts series connection capacitive reactance and/or series connection induction reactance, has improved the efficient of E power-like amplifier.
Set forth a kind of method of the E of raising power-like amplifier efficient above, the embodiment of the invention has also been set forth a kind of transmitter and a kind of base station.
A kind of transmitter can be to comprise the E power-like amplifier of setting forth in the embodiment of the invention one to embodiment three, and this E power-like amplifier can comprise power supply input power measurement module, output power measurement module, efficiency calculation module and control adjusting module.Certainly, above-mentioned transmitter can also comprise other device.
A kind of base station can be to comprise the E power-like amplifier of setting forth in the embodiment of the invention one to embodiment three, and this E power-like amplifier can comprise power supply input power measurement module, output power measurement module, efficiency calculation module and control adjusting module.Certainly, above-mentioned base station can also comprise other device.
Contents such as the information interaction between each module in said apparatus and transmitter and the base station, implementation and since with the inventive method embodiment based on same design, particular content can repeat no more referring to the narration among the inventive method embodiment herein.
The embodiment of the invention is adjusted capacitive reactance in parallel with the efficient of adjusted power amplifier before relatively adjusting capacitive reactance in parallel, relatively adjust before series connection capacitive reactance and/or the series connection induction reactance and the efficient adjustment series connection capacitive reactance of adjusted power amplifier and/or series connection induction reactance, no longer improve up to efficient, thereby improved the efficient of E power-like amplifier.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement, but the former is better execution mode under a lot of situation by hardware.Based on such understanding, all or part of can the embodying that technical scheme of the present invention contributes to background technology with the form of software product, this computer software product can be stored in the storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The embodiment of the invention has been used specific embodiment the principle and the execution mode of the embodiment of the invention has been set forth, and the explanation of above embodiment just is used to help to understand the method and the core concept thereof of the embodiment of the invention; Simultaneously, for one of ordinary skill in the art, according to the thought of the embodiment of the invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the embodiment of the invention.
Claims (5)
1. a method that improves E power-like amplifier efficient is characterized in that, comprising:
A, respectively obtain adjust before the capacitive reactance in parallel and adjust capacitive reactance in parallel after the efficient of power amplifier;
Whether B, the efficient of judging the power amplifier after the described adjustment capacitive reactance in parallel are higher than the efficient of adjusting the power amplifier before the capacitive reactance in parallel, if be higher than, according to the capacitive reactance in parallel of adjustment trend adjustment before; If be not higher than, adjust capacitive reactance in parallel according to the direction opposite with before adjustment trend;
Repeating step A, B adjust series connection capacitive reactance and/or series connection induction reactance after the efficient of power amplifier no longer improves;
C, respectively obtain adjust before series connection capacitive reactance and/or the induction reactance and adjust the series connection capacitive reactance and/or series connection induction reactance after the efficient of power amplifier;
Whether D, the efficient of judging the power amplifier after described adjustment series connection capacitive reactance and/or the series connection induction reactance are higher than the efficient of adjusting the power amplifier before series connection capacitive reactance and/or the series connection induction reactance, if be higher than, according to adjustment trend adjustment series connection capacitive reactance and/or series connection induction reactance before; If be not higher than, according to direction adjustment series connection capacitive reactance opposite and/or series connection induction reactance with before adjustment trend;
Repeating step C, D no longer improve until the efficient of power amplifier.
2. method according to claim 1 is characterized in that, the efficient of obtaining power amplifier specifically comprises:
Detect the power output and the power supply input power of power amplifier, obtain the efficient of power amplifier according to described power output and power supply input power.
3. an E power-like amplifier is characterized in that, comprising:
Power supply input power measurement module is used to measure the power supply input power of power amplifier;
The output power measurement module is used to measure the power output of power amplifier;
The efficiency calculation module is used for the efficient according to described power supply input power measurement module and described output power measurement module calculating power amplifier;
The control adjusting module, be used for before the adjustment that obtains according to the described efficiency calculation module capacitive reactance in parallel and adjust capacitive reactance in parallel after the efficient of power amplifier, adjust capacitive reactance in parallel, no longer improve until the efficient of power amplifier; Before adjustment series connection capacitive reactance that obtains according to described efficiency calculation module then and/or the series connection induction reactance and adjust the efficient of the power amplifier after series connection capacitive reactance and/or the series connection induction reactance, adjust series connection capacitive reactance and/or series connection induction reactance, no longer improve until the efficient of power amplifier; Described control adjusting module comprises:
Judge module, whether the efficient that is used to judge the power amplifier after the described adjustment capacitive reactance in parallel is higher than the efficient of adjusting the power amplifier before the capacitive reactance in parallel, and whether the efficient of judging the power amplifier after described adjustment series connection capacitive reactance and/or the series connection induction reactance is higher than the efficient of adjusting the power amplifier before series connection capacitive reactance and/or the series connection induction reactance;
Adjusting module, be used for when described judge module judges that the efficient of the power amplifier after adjusting capacitive reactance in parallel is higher than the efficient of the power amplifier before adjusting capacitive reactance in parallel, according to the capacitive reactance in parallel of adjustment trend adjustment before, efficient until power amplifier no longer improves, when described judge module judges that the efficient of the power amplifier after adjusting capacitive reactance in parallel is not higher than the efficient of the power amplifier before adjusting capacitive reactance in parallel, adjust capacitive reactance in parallel according to the direction opposite, no longer improve until the efficient of power amplifier with before adjustment trend; Then when described judge module judges that efficient after adjusting series connection capacitive reactance and/or series connection induction reactance is higher than the efficient of the power amplifier before adjusting series connection capacitive reactance and/or series connection induction reactance, according to adjustment trend adjustment series connection capacitive reactance and/or series connection induction reactance before, efficient until power amplifier no longer improves, when described judge module judges that the efficient of the power amplifier after adjusting series connection capacitive reactance and/or series connection induction reactance is not higher than the efficient of the power amplifier before adjusting series connection capacitive reactance and/or series connection induction reactance, according to direction adjustment series connection capacitive reactance opposite and/or series connection induction reactance, no longer improve until the efficient of power amplifier with before adjustment trend.
4. a transmitter is characterized in that, comprises E power-like amplifier as claimed in claim 3.
5. a base station is characterized in that, comprises E power-like amplifier as claimed in claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101683908A CN101404478B (en) | 2008-10-30 | 2008-10-30 | Method and apparatus for improving efficiency of class E power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101683908A CN101404478B (en) | 2008-10-30 | 2008-10-30 | Method and apparatus for improving efficiency of class E power amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101404478A CN101404478A (en) | 2009-04-08 |
| CN101404478B true CN101404478B (en) | 2011-05-04 |
Family
ID=40538371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101683908A Active CN101404478B (en) | 2008-10-30 | 2008-10-30 | Method and apparatus for improving efficiency of class E power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101404478B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255606B (en) * | 2011-07-25 | 2014-01-01 | 中国科学院微电子研究所 | Solid-state radio frequency power supply based on E-type power amplifying circuit |
| CN102355032A (en) * | 2011-11-01 | 2012-02-15 | 东南大学 | Wireless charging device |
| CN102420570A (en) * | 2011-12-08 | 2012-04-18 | 山东大学 | Method for improving working efficiency of DE-type power amplifier |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385957A (en) * | 2002-06-28 | 2002-12-18 | 清华大学 | High-efficient E type power amplifier optimized design method |
| JP2006093896A (en) * | 2004-09-21 | 2006-04-06 | Matsushita Electric Ind Co Ltd | Class-e amplifier and eer modulation amplifier device |
-
2008
- 2008-10-30 CN CN2008101683908A patent/CN101404478B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385957A (en) * | 2002-06-28 | 2002-12-18 | 清华大学 | High-efficient E type power amplifier optimized design method |
| JP2006093896A (en) * | 2004-09-21 | 2006-04-06 | Matsushita Electric Ind Co Ltd | Class-e amplifier and eer modulation amplifier device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101404478A (en) | 2009-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100592237C (en) | Intelligent switch power source power detection and control device | |
| CN102969802B (en) | Current type wireless power supply system load self-adapting control method | |
| CN102684712B (en) | High-efficiency frequency modulation transmitter, circuit structure of power amplifier and design method | |
| CN106655528B (en) | ECPT system and its Parameters design based on bilateral LC network | |
| US20150249483A1 (en) | Wireless power transmission system | |
| TWI413359B (en) | High efficiency audio amplifier and method thereof | |
| WO2010142462A1 (en) | Inverse class f amplifier and method | |
| CN104682583A (en) | Resonant noncontact power supply device, electric energy transmitting terminal and control method | |
| CN108282030A (en) | A kind of adaptive wireless charging method and device | |
| CN101404478B (en) | Method and apparatus for improving efficiency of class E power amplifier | |
| CN108988506A (en) | A kind of symmetrical wireless power transmission circuit of PT and its building method | |
| CN104300827A (en) | A 2400kV, 30mA mobile non-PD DC high voltage generator | |
| CN101813959B (en) | Control device of power factor correcting circuit and control method | |
| CN104426372A (en) | Switching type power conversion device and method for improving the conversion efficiency thereof | |
| CN108226654A (en) | Full-automatic dielectric loss measurement system | |
| CN202471912U (en) | Device for detecting fault of amplifier circuit and power amplifier circuit | |
| CN110971012A (en) | A class E wireless power transmission device and start-up control method | |
| Sun et al. | Design of class-E power amplifier for capacitive power transfer system | |
| CN110445231A (en) | A kind of wireless power transmission voltage-stabilizing controller based on reflected umpedance | |
| CN206060547U (en) | A kind of dynamic regulating circuit, system and Switching Power Supply | |
| CN105720693B (en) | The Parameters design of load soft handover is realized in a kind of ECPT systems | |
| CN109031101A (en) | A kind of volume production test circuit of power amplifier AGC output power | |
| CN101860230B (en) | Novel AC-DC-AC converter and control method thereof | |
| CN106411138B (en) | A kind of dynamic regulating circuit, system, method and Switching Power Supply | |
| CN104184425A (en) | Single-ended input class-D audio power amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |