CN106788311A - A kind of terminal capabilities improves circuit and mobile terminal - Google Patents
A kind of terminal capabilities improves circuit and mobile terminal Download PDFInfo
- Publication number
- CN106788311A CN106788311A CN201611087749.XA CN201611087749A CN106788311A CN 106788311 A CN106788311 A CN 106788311A CN 201611087749 A CN201611087749 A CN 201611087749A CN 106788311 A CN106788311 A CN 106788311A
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- Prior art keywords
- circuit
- radio
- capacitance
- series resonant
- resonant circuits
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/24—Frequency- independent attenuators
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1783—Combined LC in series path
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Abstract
Improve circuit and mobile terminal the invention provides a kind of terminal capabilities, it is applied in the radio circuit with flip-flop, including radio-frequency module, LC series resonant circuits, wherein radio-frequency module has nonlinear device, LC series resonant circuits are used to carry out attenuation processing to the harmonic wave outside fundamental wave, its one end is connected with the output end of radio-frequency module, and the other end is connected with radio frequency back-end circuit.The present invention realizes that the harmonic wave outside to fundamental wave carries out attenuation processing by LC series resonant circuits, while ensure that enough harmonic attenuation effects, the number of component in circuit is reduced, circuit volume is reduced, is that the assembling of component and the optimization of system provide facility.
Description
Technical field
Improve circuit and mobile terminal the present invention relates to communication technical field, more particularly to a kind of terminal capabilities.
Background technology
With the progress and development of science and technology, such as mobile phone mobile terminal device has become required in people's daily life
Product, accordingly for the requirement also more and more higher of mobile terminal device.
But, due to being required to set such as power amplifier, low-noise amplifier in the radio-frequency module of current mobile terminal equipment
Deng nonlinear device, and these nonlinear devices can produce second harmonic or higher hamonic wave etc. to system at work
The interference signal that has a negative impact of work, i.e., when electric current flow through nonlinear device can with the nonlinear device on applied
Voltage is presented nonlinear relation, can form non-sinusoidal current, and then produces harmonic wave, and harmonic wave can be produced to neighbouring channel and done
Disturb, so as to produce the adverse effects such as communication quality reduction, or even too strong interference to cause signal normal to system
Demodulation.
In addition, the modulated signal used in the communication equipment of mobile terminal is usually the envelope signal with peak-to-average force ratio,
Serious memory effect can be brought to power amplifier, especially High-power amplifier, and (characteristic of can be regarded as over is to now special in the ken
Property produce influence), memory effect can have a strong impact on the operating index of the device with memory characteristic such as power amplifier.
For in current mobile terminal equipment due to the adverse effect that the factors such as harmonic wave and memory effect are caused, it is existing
An optional mode is in technology, by increasing LC antiresonant circuits after nonlinear device, and increases capacitance
C come realize improve mobile terminal second harmonic purpose.It should be clear that although such mode can decay to harmonic wave,
Due to which employs more component, occupying larger use space.
The content of the invention
Improve circuit and mobile terminal the invention provides a kind of terminal capabilities, it is intended to solve in the prior art in order to non-
The harmonic wave of linear unit is decayed and is employed excessive component, and take up room big problem.
In order to solve the above-mentioned technical problem, improve circuit the invention provides a kind of terminal capabilities, be applied to direct current
In the radio circuit of composition, the circuit includes：
Radio-frequency module, with nonlinear device；
LC series resonant circuits, for carrying out attenuation processing, its one end and the radio-frequency module to the harmonic wave outside fundamental wave
Output end connection, the other end is connected with radio frequency back-end circuit.
Optionally, the output end of the nonlinear device in one end of the LC series resonant circuits and the radio-frequency module connects
Connect, the other end is connected with radio frequency back-end circuit.
Optionally, the nonlinear device is power amplifier, and the LC series resonant circuits are connected with the drain electrode of the power amplifier.
Optionally, the drain electrode of the power amplifier is also associated with the first capacitance, and first capacitance and the LC
Series resonant circuit is in parallel.
Optionally, the nonlinear device is low-noise amplifier, and the LC series resonant circuits are put with the low noise
The non-linear output connection of big device.
Optionally, also including direct-connected circuit, the second capacitance is provided with the direct-connected circuit；The direct-connected circuit is at end
When end need not carry out second harmonic improvement treatment, the two ends of the LC series resonant circuits are parallel-connected to.
Optionally, the direct-connected circuit includes two the second capacitances being connected in series.
Optionally, the capacitance value range of second capacitance is 20pF~50pF.
Optionally, the capacitance of second capacitance is 33pF.
The present invention also provides a kind of mobile terminal, including the radio circuit with flip-flop, is wrapped in the radio circuit
Include foregoing performance improvement circuit.
Improve circuit and mobile terminal the invention provides a kind of terminal capabilities, be applied to the radio frequency electrical with flip-flop
Lu Zhong, including radio-frequency module, LC series resonant circuits, wherein radio-frequency module have nonlinear device, and LC series resonant circuits are used
Harmonic wave outside to fundamental wave carries out attenuation processing, and its one end is connected with the output end of radio-frequency module, the other end and radio frequency rear end
Circuit is connected.The present invention realizes that the harmonic wave outside to fundamental wave carries out attenuation processing by LC series resonant circuits, ensure that foot
While enough harmonic attenuation effects, the number of component in circuit is reduced, reduce circuit volume, be the assembling of component
Optimization with system provides facility.
Brief description of the drawings
Fig. 1 is that the terminal capabilities that the embodiment of the present invention one is provided improves circuit diagram；
Fig. 2 is that the terminal capabilities that the embodiment of the present invention two is provided improves circuit diagram；
Fig. 3 is that the terminal capabilities that the embodiment of the present invention three is provided improves circuit diagram.
Specific embodiment
The present invention is applied to all terminals including radio circuit, and wherein radio circuit carries certain flip-flop.Eventually
End can be specifically such as mobile phone, PC, server, and the present invention is made below by specific embodiment combination accompanying drawing
Further describe.
Embodiment one：
Fig. 1 is that the terminal capabilities that the embodiment of the present invention one is provided improves circuit diagram, refer to Fig. 1, is applied to carry
In the radio circuit of flip-flop, the circuit includes：
Radio-frequency module 11, with nonlinear device；
LC series resonant circuits 12, for carrying out attenuation processing, its one end and radio-frequency module to the harmonic wave outside fundamental wave
Output end is connected, and the other end is connected with radio frequency back-end circuit 13.
In the present embodiment, the nonlinear device in radio-frequency module can be power amplifier, abbreviation power amplifier P, can be with
It is low-noise amplifier LNA etc..
Signal in the terminal, by nonlinear device, such as power amplifier, when producing the non-linear distortions such as second harmonic, by
In the selecting frequency characteristic that LC series resonant circuits show to fundamental wave, attenuation processing can be carried out to the harmonic wave in addition to fundamental wave, from
And make the fundamental wave component accounting in signal more, reduce harmonic wave adverse effect.
LC series resonant circuits are connected including electric capacity C1 and inductance L1, electric capacity C1 and inductance L1.LC series resonant circuits with
The output end connection of radio-frequency module, the other end is connected with radio frequency back-end circuit, i.e., the other end is connected with the other parts in system,
Can be ground connection, can connect other devices.
In an embodiment of the present invention, when nonlinear device is power amplifier, the drain electrode of LC series resonant circuits and power amplifier
Connection.
In an embodiment of the present invention, the drain electrode of power amplifier is also associated with the first capacitance, and the first capacitance
It is in parallel with LC series resonant circuits.
In an embodiment of the present invention, nonlinear device is low-noise amplifier, LC series resonant circuits and low noise
The non-linear output connection of acoustic amplifier.
In an embodiment of the present invention, also the second capacitance is provided with direct-connected circuit, directly including direct-connected circuit
Connection circuit is parallel-connected to the two ends of LC series resonant circuits when terminal need not carry out second harmonic improvement treatment.
In an embodiment of the present invention, direct-connected circuit includes two the second capacitances being connected in series.
In an embodiment of the present invention, the capacitance value range of the second capacitance is 20pF~50pF.
In an embodiment of the present invention, the capacitance of the second capacitance is 33pF.
When signal in mobile terminal produces the non-linear distortions such as second harmonic by nonlinear device, LC series resonances
Circuit shows the infinitely great characteristic of impedance to fundamental wave, shows short circuit curve to second harmonic, therefore above-mentioned improvement mobile terminal
The circuit of performance can be effectively improved second harmonic in the case where fundamental wave is not influenceed.And be connected with LC antiresonant circuits one end
First shelve electric capacity, the generation of direct current shorted to earth phenomenon can be avoided, and then make the electricity of the improvement mobile terminal performance
Road directly can use in the circuit containing flip-flop, and then reach the purpose for improving mobile terminal second harmonic.
In addition, nonlinear device in mobile terminal, such as nonlinear device be low-noise amplifier, carrier switch when
Curent change is waited than larger, causes supply current not catch up with, with LC series resonant circuits in the circuit of improvement mobile terminal performance
First capacitance in parallel can store substantial amounts of electric charge, it is possible to be effectively improved above-mentioned phenomenon, and then improve non-linear device
The memory effect of part.
The size of LC series resonant circuits is smaller, can reduce its area for occupying mobile terminal pcb board, beneficial to terminal
The cabling design of pcb board, beneficial to the lighter, thin of Terminal Design.
Additionally, the first capacitance can also be the capacitance of variable capacitance, i.e. electric capacity be it is adjustable, can be according to specific
Usage scenario and demand are changed.
Present embodiments providing a kind of terminal capabilities improves circuit, is applied in the radio circuit with flip-flop, bag
Include radio-frequency module, LC series resonant circuits, radio-frequency module has outside nonlinear device, LC series resonant circuits be used for fundamental wave
Harmonic wave carry out attenuation processing, its one end is connected with the output end of radio-frequency module, and the other end is connected with radio frequency back-end circuit.Utilize
The selecting frequency characteristic of LC series resonant circuits, attenuation processing is carried out by the harmonic wave outside the fundamental wave in radio circuit, effective to improve
The situation of the non-linear distortion of nonlinear device, improves second harmonic, and occupies little space, and facilitates the row of terminal pcb board
Line is laid out.
Additionally, the present embodiment additionally provides a kind of mobile terminal for improving circuit with terminal capabilities, in the mobile terminal
Including the radio circuit with flip-flop.
Second embodiment
Fig. 2 improves circuit diagram for a kind of terminal capabilities that the present embodiment is provided, and is applied to penetrating with flip-flop
In frequency circuit, including：
Radio-frequency module 11, with nonlinear device, wherein nonlinear device is low-noise amplifier LNA；
LC series resonant circuits 12, for carrying out attenuation processing, its one end and radio-frequency module to the harmonic wave outside fundamental wave
Output end is connected, and the other end is connected with radio frequency back-end circuit 13.
LC series resonant circuits 12, including electric capacity C1 and inductance L1, electric capacity C1 and inductance L1 series connection, LC series resonant circuits
It is connected with the non-linear output 0 of low-noise amplifier LNA, the other end is then connected with radio frequency back-end circuit.Wherein, radio frequency rear end
Circuit can be ground connection, can connect other devices, can be other parts of access circuit etc..
In the present embodiment, the non-linear output of low-noise amplifier LNA can also be connected with other equipment M, and M can be with
It is used to be connected with the equipment of normal work with low-noise amplifier LNA in the radio-frequency module for being terminal device.
In the present embodiment, direct-connected circuit 14 can also be included, the second capacitance C3 is provided with direct-connected circuit, its
In, direct-connected circuit is used to, when terminal need not carry out the improvement treatment of the second subharmonic, be parallel-connected to LC series resonant circuits
Two ends.
In the present embodiment, direct-connected circuit includes two the second capacitance C3 being connected in series, each second blocking electricity
Hold the capacitance value range of C3 between 20pF~50pF, to be still advisable with 33pF.
When the signal of lane terminal produces the non-linear distortions such as second harmonic by low-noise amplifier, LC series resonances electricity
Road shows the infinitely great characteristic of impedance to fundamental wave, short circuit curve is showed to second harmonic, therefore improve mobile terminal performance
Circuit can be effectively improved second harmonic in the case where fundamental wave is not influenceed.And need not be carried out at second harmonic improvement in terminal
During reason, the second capacitance can be provided with by direct-connected circuit transmissioning signal in direct-connected circuit, direct-connected circuit and LC series connection are humorous
Shake and can be switched over by such as switch means such as single-pole double-throw switch (SPDT) K between circuit, when LC series resonant circuits are connected, can
The improvement treatment to second harmonic is carried out, when direct-connected circuit is connected, then the improvement treatment to second harmonic is not carried out.
Fig. 3 improves circuit diagram for a kind of terminal capabilities that the present embodiment is provided, and is applied to penetrating with flip-flop
In frequency circuit, including：
Radio-frequency module 11, with nonlinear device, nonlinear device is power amplifier P；
LC series resonant circuits 12, for carrying out attenuation processing, its one end and radio-frequency module to the harmonic wave outside fundamental wave
Output end is connected, and the other end is connected with radio frequency back-end circuit 13.
Power amplifier P includes gate terminal G and drain electrode end D.LC series resonant circuits, including electric capacity C1 and inductance L1, electric capacity C1 and
Inductance L1 connects, and LC series resonant circuits one end is connected with drain electrode end D, and the other end is connected with radio frequency back-end circuit.Wherein, radio frequency
Back-end circuit can be ground connection, can connect other devices, can be other parts of access circuit etc..
In the present embodiment, the drain electrode of power amplifier is also associated with the first capacitance C2, and the first capacitance C2 and LC goes here and there
Connection resonance circuit is in parallel.
In the present embodiment, direct-connected circuit 14 can also be included, the second capacitance C3 is provided with direct-connected circuit, it is direct-connected
Circuit 14 is parallel-connected to the two ends of LC series resonant circuits when terminal need not carry out second harmonic improvement treatment.
In the present embodiment, direct-connected circuit includes two the second capacitance C3 being connected in series, each second blocking electricity
Hold the capacitance value range of C3 between 20pF~50pF, to be still advisable with 33pF.
When the signal of lane terminal produces the non-linear distortions such as second harmonic by power amplifier, LC series resonant circuits are to fundamental wave
The infinitely great characteristic of impedance is showed, short circuit curve is showed to second harmonic, therefore the circuit for improving mobile terminal performance can be
In the case of not influenceing fundamental wave, second harmonic is effectively improved.And when terminal need not carry out second harmonic and improve treatment, can be with
By direct-connected circuit transmissioning signal, be provided with the second capacitance in direct-connected circuit, direct-connected circuit and LC series resonant circuits it
Between can be switched over by such as switch means such as single-pole double-throw switch (SPDT) K, when LC series resonant circuits are connected, can carry out to two
The improvement treatment of subharmonic, when direct-connected circuit is connected, does not then carry out the improvement treatment to second harmonic.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to protection of the invention
Scope.
Claims (10)
1. a kind of terminal capabilities improves circuit, it is characterised in that be applied in the radio circuit with flip-flop, the circuit
Including：
Radio-frequency module, with nonlinear device；
LC series resonant circuits, for carrying out attenuation processing to the harmonic wave outside fundamental wave, its one end is defeated with the radio-frequency module
Go out end connection, the other end is connected with radio frequency back-end circuit.
2. terminal capabilities as claimed in claim 1 improves circuit, it is characterised in that one end of the LC series resonant circuits with
The output end connection of the nonlinear device in the radio-frequency module, the other end is connected with radio frequency back-end circuit.
3. terminal capabilities as claimed in claim 2 improves circuit, it is characterised in that the nonlinear device is power amplifier, described
LC series resonant circuits are connected with the drain electrode of the power amplifier.
4. terminal capabilities as claimed in claim 3 improves circuit, it is characterised in that the drain electrode of the power amplifier is also associated with first
Capacitance, and first capacitance is in parallel with the LC series resonant circuits.
5. the terminal capabilities as described in right wants 2 improves circuit, it is characterised in that the nonlinear device is low noise amplification
Device, the LC series resonant circuits are connected with the non-linear output of the low-noise amplifier.
6. the terminal capabilities as described in claim any one of 1-5 improves circuit, it is characterised in that also including direct-connected circuit, institute
State and be provided with the second capacitance in direct-connected circuit；The direct-connected circuit terminal need not carry out second harmonic improve treatment when,
It is parallel-connected to the two ends of the LC series resonant circuits.
7. terminal capabilities as claimed in claim 6 improves circuit, it is characterised in that the direct-connected circuit includes that two series connection connect
The second capacitance for connecing.
8. terminal capabilities as claimed in claim 7 improves circuit, it is characterised in that the capacitance model of second capacitance
It is 20pF~50pF to enclose.
9. terminal capabilities as claimed in claim 8 improves circuit, it is characterised in that the capacitance of second capacitance is
33pF。
10. a kind of mobile terminal, it is characterised in that including the radio circuit with flip-flop, the radio circuit includes
Performance improvement circuit as described in claim any one of 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611087749.XA CN106788311A (en) | 2016-11-30 | 2016-11-30 | A kind of terminal capabilities improves circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611087749.XA CN106788311A (en) | 2016-11-30 | 2016-11-30 | A kind of terminal capabilities improves circuit and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106788311A true CN106788311A (en) | 2017-05-31 |
Family
ID=58914049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611087749.XA Pending CN106788311A (en) | 2016-11-30 | 2016-11-30 | A kind of terminal capabilities improves circuit and mobile terminal |
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| Country | Link |
|---|---|
| CN (1) | CN106788311A (en) |
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| CN103490794A (en) * | 2013-09-09 | 2014-01-01 | 熊猫电子集团有限公司 | Variable shortwave antenna tuner matching network structure circuit |
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| CN104716906A (en) * | 2015-04-03 | 2015-06-17 | 广东工业大学 | Method and circuit structure for improving efficiency of wide-band radio frequency power amplifier |
| CN104967436A (en) * | 2015-07-01 | 2015-10-07 | 上海斐讯数据通信技术有限公司 | Circuit for improving performance of mobile terminal |
| CN105811894A (en) * | 2016-02-28 | 2016-07-27 | 杭州臻镭微波技术有限公司 | Equalizing network for broadband radio frequency amplifier, broadband radio frequency amplifier and adjusting method |
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- 2016-11-30 CN CN201611087749.XA patent/CN106788311A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1983809A (en) * | 2005-12-16 | 2007-06-20 | 中国科学院声学研究所 | Wideband acoustic surface-wave switching filter set |
| CN101166014A (en) * | 2006-10-18 | 2008-04-23 | 松下电器产业株式会社 | Power amplifier |
| US20080136729A1 (en) * | 2006-12-08 | 2008-06-12 | Electronics And Telecommunications Research Institute | Antenna matching device and transceiver having the same |
| CN101540590A (en) * | 2008-01-31 | 2009-09-23 | 富士通株式会社 | Acoustic wave device, duplexer, communication module, and communication apparatus |
| CN102647200A (en) * | 2011-02-18 | 2012-08-22 | 中国移动通信集团公司 | A radio frequency front-end receiving device, transmitting device and terminal |
| CN103986421A (en) * | 2013-02-08 | 2014-08-13 | 英飞凌科技股份有限公司 | Input Matching Networks for Power Circuits |
| CN103490794A (en) * | 2013-09-09 | 2014-01-01 | 熊猫电子集团有限公司 | Variable shortwave antenna tuner matching network structure circuit |
| CN103595438A (en) * | 2013-11-14 | 2014-02-19 | 华为终端有限公司 | Anti-jamming device and method and mobile terminal |
| CN104716906A (en) * | 2015-04-03 | 2015-06-17 | 广东工业大学 | Method and circuit structure for improving efficiency of wide-band radio frequency power amplifier |
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| CN105811894A (en) * | 2016-02-28 | 2016-07-27 | 杭州臻镭微波技术有限公司 | Equalizing network for broadband radio frequency amplifier, broadband radio frequency amplifier and adjusting method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20170531 |