CN103187716A - Protective circuit of power amplifier tube, method of power amplifier tube and power amplifier tube - Google Patents
Protective circuit of power amplifier tube, method of power amplifier tube and power amplifier tube Download PDFInfo
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- CN103187716A CN103187716A CN2011104556145A CN201110455614A CN103187716A CN 103187716 A CN103187716 A CN 103187716A CN 2011104556145 A CN2011104556145 A CN 2011104556145A CN 201110455614 A CN201110455614 A CN 201110455614A CN 103187716 A CN103187716 A CN 103187716A
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- power tube
- power amplifier
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- current detector
- amplifier tube
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000001681 protective effect Effects 0.000 title claims abstract description 17
- 230000001052 transient effect Effects 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims description 5
- 230000006378 damage Effects 0.000 abstract description 6
- 208000027418 Wounds and injury Diseases 0.000 abstract 1
- 208000014674 injury Diseases 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/52—Circuit arrangements for protecting such amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
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- Engineering & Computer Science (AREA)
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- Protection Of Static Devices (AREA)
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Abstract
The invention provides a protective circuit of a power amplifier tube, a method of the power amplifier tube and the power amplifier tube. The protective circuit of the power amplifier tube comprises the power amplifier tube, an input end of the power amplifier tube is connected with an input end of a radio-frequency signal, a drain electrode or a collector of the power amplifier tube is connected with a first power supply (VDD) end, and an grid electrode or a base of the power amplifier tube is connected with a second power supply (VGC) end. The protective circuit of the power amplifier tube further comprises a transient current detector and a controller, wherein the transient current detector is located between the drain electrode or the collector of the power amplifier tube and a direct current power supply end and is used for detecting in real-time the current when the power amplifier tube works, and the controller is connected with the transient current detector and is used for cutting off the radio-frequency signal which is input into the power amplifier tube or controlling the cutting-off of the power amplifier tube when the current detected by the transient current detector is larger than a preset limit value. The protective circuit of the power amplifier tube, the method of the power amplifier tube and the power amplifier tube can avoid injury caused by overload of the power amplifier tube.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of protective circuit, method and power tube of power tube.
Background technology
In base station product competition fierce day by day today, power amplifier module is as the key modules of base station product, and its competition is fiercer, except efficient, veneer cost, be also embodied on the maintenance cost, associated research and development technology and production application will become the focus of enterprises pay attention in the industry.
The traditional power tube circuit diagram of industry as shown in Figure 1, namely this circuit comprises a power tube, the input of this power tube links to each other with the input of radiofrequency signal (RFin), the drain electrode of this power tube or collector electrode link to each other with first power supply (VDD) end, the grid of this power tube or base stage link to each other with second source (VGS) end, the output of this power tube links to each other with the output of radiofrequency signal (RFout), and DC power supply is grid (base stage) and the drain electrode (collector electrode) that power tube is given in directly power supply.
Yet, when load mismatch, voltage instability etc. causes the power tube overload, power tube is damaged.
Summary of the invention
The embodiment of the invention provides a kind of protective circuit, method and power tube of power tube, damages problem to solve the power tube that causes the power tube overload to cause because of load mismatch, voltage instability etc.
The embodiment of the invention provides a kind of protective circuit of power tube; comprise power tube; the input of this power tube links to each other with the input of radiofrequency signal; the drain electrode of this power tube or collector electrode link to each other with first power supply (VDD) end; the grid of this power tube or base stage link to each other with second source (VGS) end; this circuit also comprises transient current detector and controller, wherein:
Described transient current detector between the drain electrode or collector electrode and described dc power supply terminal of described power tube, is used for the electric current when the described power tube of detection is worked in real time;
Described controller links to each other with described transient current detector, is used for turn-offing radiofrequency signal or the described power tube of control shutoff of the described power tube of input when the detected described electric current of described transient current detector during greater than predetermined threshold.
Preferably, this circuit also comprises switch; Described controller is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, transmits control signal to described switch; Described switch between the input of the input of described radiofrequency signal and described power tube, is used for receiving the described control signal that described controller sends, and turn-offs described radiofrequency signal according to this control signal.
Preferably, described controller between the grid or base stage of described VGS and described power tube, is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, and described power tube is turn-offed in control grid or base stage power supply.
The embodiment of the invention also provides a kind of power tube, comprise tube core (die) module, input, output, drain electrode or collector electrode and grid or base stage, this die module is between described input and described output, this die module links to each other with first power supply (VDD) end by described drain electrode or collector electrode, link to each other with second source (VGS) end by grid or base stage, this power tube also comprises transient current detector and controller, wherein:
Described transient current detector, between the drain electrode or collector electrode and described die module of described power tube, the electric current when being used for detecting power tube work in real time;
Described controller links to each other with described transient current detector, is used for turn-offing radiofrequency signal or the described die module of control shutoff of the described die module of input when the detected described electric current of described transient current detector during greater than predetermined threshold.
Preferably, this power tube also comprises switch; Described controller is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, transmits control signal to described switch; Described switch between the input and described die module of described power tube, is used for receiving the described control signal that described controller sends, and turn-offs the radiofrequency signal of the described die module of input according to this control signal.
Preferably, described controller between the grid or base stage of described die module and described power tube, is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, described die module is turn-offed in control grid or base stage power supply.
Preferably, comprise a die or a plurality of die in the described die module.
Preferably, when described die module comprised a plurality of die, described a plurality of die constituted described die module with parallel way.
The embodiment of the invention also provides a kind of guard method of power tube, and this method comprises:
Electric current when the described power tube of detection is worked in real time;
When detected described electric current during greater than predetermined threshold, turn-off the radiofrequency signal of the described power tube of input, perhaps control grid or the base stage power supply of described power tube, turn-off described power tube.
Preferably, described method also comprises: when detected described electric current during greater than predetermined threshold, turn-off the radiofrequency signal of die module in the described power tube of input, perhaps control grid or the base stage power supply of described power tube, turn-off described die module.
The protective circuit of above-mentioned power tube, method and power tube; electric current when working by detecting power tube; when this electric current surpasses predetermined threshold; turn-off radiofrequency signal or control grid (base stage) power supply of die module in input power tube or the power tube; turn-off die module in power tube or the power tube, thereby avoid the power tube overload to damage.
Description of drawings
Fig. 1 is existing power tube circuit diagram;
Fig. 2 is the structural representation of the protective circuit embodiment one of invention power tube;
Fig. 3 is the structural representation of the protective circuit embodiment two of invention power tube;
Fig. 4 is the structural representation of invention power tube embodiment one;
Fig. 5 is the structural representation of invention power tube embodiment two;
Fig. 6 is the structural representation of invention power tube embodiment three;
Fig. 7 is the structural representation of invention power tube embodiment four.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter will be elaborated to embodiments of the invention by reference to the accompanying drawings.Need to prove that under the situation of not conflicting, the embodiment among the application and the feature among the embodiment be combination in any mutually.
The embodiment of the invention provides a kind of protective circuit of power tube; comprise power tube, the drain electrode of this power tube or collector electrode link to each other with first power supply (VDD) end, and the grid of this power tube or base stage link to each other with second source (VGS) end; this circuit also comprises transient current detector and controller, wherein:
Described transient current detector between the drain electrode or collector electrode and described dc power supply terminal of described power tube, is used for the electric current when the described power tube of detection is worked in real time;
Described controller links to each other with described transient current detector, is used for turn-offing radiofrequency signal or the described power tube of control shutoff of the described power tube of input when the detected described electric current of described transient current detector during greater than predetermined threshold.
Wherein, this circuit can also comprise switch; Described controller is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, transmits control signal to described switch; Described switch between the input of the input of described radiofrequency signal and described power tube, is used for receiving the described control signal that described controller sends, and turn-offs described radiofrequency signal according to this control signal.Concrete structure as shown in Figure 2, this transient current detector catches the power tube electric current in when work in real time, when the electric current that detects seizure when controller surpassed the predetermined threshold that controller provides, controller control high-speed switch turn-offed the radiofrequency signal of input rapidly.
In addition, described controller between the grid or base stage of described VGS and described power tube, is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, and described power tube is turn-offed in control grid or base stage power supply; Concrete structure as shown in Figure 3, power tube is turn-offed in this controller control grid (base stage) power supply, thereby avoids because of the overload that situations such as load mismatch, power supply shakiness cause power tube being damaged.
Above-mentioned power tube protective circuit not only can be protected the LDMOS pipe, also can protect the power tube of other type; Not only can be used for protecting single tube, also can be used for protecting the power tube in the various circuit frameworks.
Further, also peripheral circuit can be integrated into power tube inside, existing power tube comprises die module, input, output, drain electrode or collector electrode and grid or base stage, one end of this die module links to each other with described input, the other end of this die module links to each other with described output, described drain electrode or collector electrode link to each other with first power supply (VDD) end, grid or base stage link to each other with second source (VGS) end, compare with existing power tube, power tube of the present invention also comprises transient current detector and controller, wherein:
Described transient current detector, between the drain electrode or collector electrode and described die module of described power tube, the electric current when being used for detecting power tube work in real time;
Described controller links to each other with described transient current detector, is used for turn-offing radiofrequency signal or the described die module of control shutoff of the described die module of input when the detected described electric current of described transient current detector during greater than predetermined threshold.
Wherein, this power tube can also comprise switch; Described controller is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, transmits control signal to described switch; Described switch between the input and described die module of described power tube, is used for receiving the described control signal that described controller sends, and turn-offs the radiofrequency signal of the described die module of input according to this control signal.Concrete structure as shown in Figure 4, when the big electric current that in time captures when the transient current detector surpassed predetermined threshold, the controller control switch cut off the radiofrequency signal of input Die rapidly.
Can comprise a die or a plurality of die in the described die module; When described die module comprised a plurality of die, described a plurality of die constituted described die module with parallel way, and concrete structure as shown in Figure 5.
In addition, described controller can be positioned between the grid (base stage) of described die module and described power tube, is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, described die module is turn-offed in control grid or base stage power supply; Concrete structure as shown in Figure 6, Die is turn-offed in this controller control grid (base stage) power supply, thus the protection power tube damages because of overload.
Can comprise a die or a plurality of die in the described die module; When described die module comprised a plurality of die, described a plurality of die constituted described die module with parallel way, and concrete structure as shown in Figure 7.
Above-mentioned power tube can be managed for LDMOS, also can be the power tube of other type.
The protective circuit of above-mentioned power tube and power tube, simple and reliable, be easy to realize, can be widely used in the power amplifier, prevent the power amplifier overload effectively and the damage power tube.
The embodiment of the invention also provides a kind of guard method of power tube, and this method comprises:
Step 1, the electric current when detecting the work of described power tube in real time;
Step 2, when detected described electric current during greater than predetermined threshold, turn-off the radiofrequency signal of the described power tube of input, perhaps control grid (base stage) power supply of described power tube, turn-off described power tube.
Above-mentioned situation mainly is the power tube protective circuit at structure shown in Fig. 2-3; This method can also comprise: when detected described electric current during greater than predetermined threshold, turn-off the radiofrequency signal of the die module in the described power tube of input, perhaps control grid (base stage) power supply of described power tube, turn-off described die module.This situation mainly is the power tube at structure shown in Fig. 4-7.
The guard method of above-mentioned power tube can prevent effectively that power amplifier from transshipping and the damage power tube, has improved reliability and has easily realized accurate control.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to finish by program, said procedure can be stored in the computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, only with reference to preferred embodiment the present invention is had been described in detail.Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. the protective circuit of a power tube; comprise power tube; the input of this power tube links to each other with the input of radiofrequency signal; the drain electrode of this power tube or collector electrode link to each other with first power supply (VDD) end; the grid of this power tube or base stage link to each other with second source (VGS) end; it is characterized in that this circuit also comprises transient current detector and controller, wherein:
Described transient current detector between the drain electrode or collector electrode and described dc power supply terminal of described power tube, is used for the electric current when the described power tube of detection is worked in real time;
Described controller links to each other with described transient current detector, is used for turn-offing radiofrequency signal or the described power tube of control shutoff of the described power tube of input when the detected described electric current of described transient current detector during greater than predetermined threshold.
2. circuit according to claim 1 is characterized in that, this circuit also comprises switch;
Described controller is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, transmits control signal to described switch;
Described switch between the input of the input of described radiofrequency signal and described power tube, is used for receiving the described control signal that described controller sends, and turn-offs described radiofrequency signal according to this control signal.
3. circuit according to claim 1 is characterized in that:
Described controller between the grid or base stage of described VGS and described power tube, is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, and described power tube is turn-offed in control grid or base stage power supply.
4. power tube, comprise tube core (die) module, input, output, drain electrode or collector electrode and grid or base stage, this die module is between described input and described output, this die module links to each other with first power supply (VDD) end by described drain electrode or collector electrode, link to each other with second source (VGS) end by grid or base stage, it is characterized in that this power tube also comprises transient current detector and controller, wherein:
Described transient current detector, between the drain electrode or collector electrode and described die module of described power tube, the electric current when being used for detecting power tube work in real time;
Described controller links to each other with described transient current detector, is used for turn-offing radiofrequency signal or the described die module of control shutoff of the described die module of input when the detected described electric current of described transient current detector during greater than predetermined threshold.
5. power tube according to claim 4 is characterized in that, this power tube also comprises switch;
Described controller is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, transmits control signal to described switch;
Described switch between the input and described die module of described power tube, is used for receiving the described control signal that described controller sends, and turn-offs the radiofrequency signal of the described die module of input according to this control signal.
6. power tube according to claim 4 is characterized in that:
Described controller between the grid or base stage of described die module and described power tube, is for when the detected described electric current of described transient current detector during greater than described predetermined threshold, and described die module is turn-offed in control grid or base stage power supply.
7. according to claim 5 or 6 described power tubes, it is characterized in that:
Comprise a die or a plurality of die in the described die module.
8. power tube according to claim 7 is characterized in that:
When described die module comprised a plurality of die, described a plurality of die constituted described die module with parallel way.
9. the guard method of a power tube is characterized in that, this method comprises:
Electric current when the described power tube of detection is worked in real time;
When detected described electric current during greater than predetermined threshold, turn-off the radiofrequency signal of the described power tube of input, perhaps control grid or the base stage power supply of described power tube, turn-off described power tube.
10. method according to claim 9 is characterized in that, described method also comprises:
When detected described electric current during greater than predetermined threshold, turn-off the radiofrequency signal of die module in the described power tube of input, perhaps control grid or the base stage power supply of described power tube, turn-off described die module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104556145A CN103187716A (en) | 2011-12-30 | 2011-12-30 | Protective circuit of power amplifier tube, method of power amplifier tube and power amplifier tube |
| PCT/CN2012/072542 WO2013097361A1 (en) | 2011-12-30 | 2012-03-19 | Protection circuit and method for power amplifier transistor and power amplifier transistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104556145A CN103187716A (en) | 2011-12-30 | 2011-12-30 | Protective circuit of power amplifier tube, method of power amplifier tube and power amplifier tube |
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| Publication Number | Publication Date |
|---|---|
| CN103187716A true CN103187716A (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104556145A Pending CN103187716A (en) | 2011-12-30 | 2011-12-30 | Protective circuit of power amplifier tube, method of power amplifier tube and power amplifier tube |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103187716A (en) |
| WO (1) | WO2013097361A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045300A1 (en) * | 2014-09-25 | 2016-03-31 | 中兴通讯股份有限公司 | Power amplifier control method, device, gan power amplifier and gaas power amplifier |
| CN107977039A (en) * | 2017-12-28 | 2018-05-01 | 北京北广科技股份有限公司 | The random waveform long-range control method of high power amplifier |
| CN108107966A (en) * | 2017-12-28 | 2018-06-01 | 北京北广科技股份有限公司 | A kind of remote control High power amplifier circuits and its application method |
| CN109560779A (en) * | 2018-11-15 | 2019-04-02 | 南京长峰航天电子科技有限公司 | A kind of Microwave Power Amplifier pipe Control protection system |
| CN109599844A (en) * | 2018-11-19 | 2019-04-09 | 普联技术有限公司 | A kind of radio circuit guard method, device and antenna equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI770828B (en) * | 2020-10-14 | 2022-07-11 | 立積電子股份有限公司 | Amplification circuit |
| TWI724980B (en) | 2020-10-14 | 2021-04-11 | 立積電子股份有限公司 | Amplification circuit |
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| CN101320963A (en) * | 2003-08-07 | 2008-12-10 | 株式会社Ntt都科摩 | power amplifier |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045300A1 (en) * | 2014-09-25 | 2016-03-31 | 中兴通讯股份有限公司 | Power amplifier control method, device, gan power amplifier and gaas power amplifier |
| CN107977039A (en) * | 2017-12-28 | 2018-05-01 | 北京北广科技股份有限公司 | The random waveform long-range control method of high power amplifier |
| CN108107966A (en) * | 2017-12-28 | 2018-06-01 | 北京北广科技股份有限公司 | A kind of remote control High power amplifier circuits and its application method |
| CN109560779A (en) * | 2018-11-15 | 2019-04-02 | 南京长峰航天电子科技有限公司 | A kind of Microwave Power Amplifier pipe Control protection system |
| CN109560779B (en) * | 2018-11-15 | 2023-03-03 | 南京长峰航天电子科技有限公司 | Microwave power amplifier tube control protection system |
| CN109599844A (en) * | 2018-11-19 | 2019-04-09 | 普联技术有限公司 | A kind of radio circuit guard method, device and antenna equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013097361A1 (en) | 2013-07-04 |
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Application publication date: 20130703 |