CN101145761A - Power amplifier temperature compensation device and method - Google Patents
Power amplifier temperature compensation device and method Download PDFInfo
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- CN101145761A CN101145761A CNA2006101131072A CN200610113107A CN101145761A CN 101145761 A CN101145761 A CN 101145761A CN A2006101131072 A CNA2006101131072 A CN A2006101131072A CN 200610113107 A CN200610113107 A CN 200610113107A CN 101145761 A CN101145761 A CN 101145761A
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Abstract
The invention discloses a temperature compensating device and a method for a power amplifier. The device comprises a detection module, an analog-to-digital conversion module, a control module, and a digital-to-analog converter module, wherein the detection module is used for detecting the working current of the power amplifier, obtaining the corresponding voltage based on the working current and transmitting the voltage to the analog-to-digital conversion module; the analog-to-digital conversion module is used for receiving the voltage from the detection module and converting the voltage to a digital signal and transmitting to the control module; the control module is used for receiving the digital signal from the analog-to-digital conversion module, obtaining a regulation value based on the digital signal value and a preset value and transmitting the regulation value to the digital-to-analog converter module; and the digital-to-analog converter module is used for receiving the regulation value from the control module, and transmitting the analog signal corresponding to the regulation value to the control terminal of the power amplifier to superpose with the original control signal of the power amplifier. The invention can realize real-time monitoring and compensation of the working current of the power amplifier.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of power amplifier temperature compensation device and method.
Background technology
In base station, broadcasting, cable TV and satellite communication, some power amplifiers are when traffic carrying capacity changes, and its power output also needs to change thereupon, and the variation of power makes the power consumption of these power amplifiers also change.Power consumption becomes conference and causes the power amplifier heating, thereby causes temperature to raise, and simultaneously, the variation of ambient temperature also can exert an influence to temperature.
Be example with the main devices power amplification organ pipe in the final power amplifier of base station radio-frequency front end below, explanation need be carried out the reason of temperature-compensating to power amplifier.
Main devices in the final power amplifier of base station radio-frequency front end be the leakage level quiescent current of power amplification organ pipe and grid voltage relation as shown in Figure 1, as can be seen from Figure 1, when grid voltage V increases, leak a level quiescent current I and also increase thereupon.For radio-frequency power amplifier, when its best performance, (mainly refer to linear index), corresponding to specific leakage level quiescent current Idq, therefore, the quiescent current of holding power amplifier is constant as much as possible, with the linear index of guaranteed output amplifier tube.
When variation of ambient temperature, if keep the grid voltage Vgs of power amplification organ pipe constant, then the leakage level quiescent current Idq of power amplification organ pipe can raise along with variations in temperature.Therefore, constant for the quiescent current of holding power amplifier tube, need by changing the grid voltage of power amplification organ pipe, keep power amplifier to leak the level quiescent current and vary with temperature smaller as far as possible.
Final power amplifier for the base station radio-frequency front end, owing to work under the high-power state, be subjected to ambient temperature and base station transmit signals dynamic range to influence (signal power of base station can change along with business), cause the variations in temperature of the main devices power amplification organ pipe in the power amplifier itself bigger, if there is not corresponding temperature-compensation circuit, will have a strong impact on the linearity of power amplifier, making the signal quality variation that send the base station finally influences the demodulation of terminal.
At present, the method that power amplifier is carried out temperature-compensating can be summed up as two kinds:
Method one is utilized the analogue device compensation.
The principle of this method is: find the temperature variant slope of control signal of power amplifier and the control signal of power amplifier to vary with temperature the close analogue device of slope, by the control signal of this analogue device control power amplifiers, and then the operating current of holding power amplifier is constant.
Though this method realizes simple, cost is low, because the discreteness of analogue device is bigger, be not suitable for producing in batches, therefore, can not be used widely.
Method two utilizes digital circuit to compensate, and is called look-up method again.
Fig. 2 is the module map of existing power amplifier temperature compensation device, and as shown in Figure 2, this circuit comprises: detection module, control module and D/A converter module, wherein,
Described detection module is used for the testing environment temperature value, and this temperature value is sent to control module.
Described control module is used for according to the temperature value that receives, the control signal value the when operating current that obtains the pairing holding power amplifier of this temperature value of tabling look-up is constant, and the difference of this control signal value and preset value sent to D/A converter module.Described preset value is set in advance in the control module, and its value is the pairing digital voltage value of the operating current of power amplifier when quiescent operation in normal operation.
In control module, when the operating current of in store record holding power amplifier is constant, the table 1 of the control signal of power amplifier and ambient temperature value corresponding relation.This table obtains by doing following experiment in advance, the method of this experiment is as follows: when temperature during at particular value, the artificial control signal value of adjusting control module, and the operating current of monitoring power amplifier, when the operating current of adjusting to power amplifier is steady state value, the control signal value of the power amplifier of record this moment, the control signal value of power amplifier when constant as the operating current of the pairing holding power amplifier of this temperature.Then, continue to adjust temperature value, and note the control signal value of the operating current of the pairing holding power amplifier of each temperature value power amplifier when constant.
Described D/A converter module is used to receive the control signal value of control module and the difference of preset value, and the pairing analog signal of this difference is sent to the control end of power amplifier, and is superimposed with the original control signal of power amplifier.The original radio-frequency input signals of power amplifier is a high-frequency signal.The output signal of D/A converter module is a low frequency signal.
The original radio-frequency input signals of power amplifier can pass through earlier every straight module, send to the control end of power amplifier afterwards again after superimposed with the analog signal of D/A converter module output, its effect is logical the interchange, intercept low frequency signal, the low frequency signal that prevents D/A converter module output flows to the original radio-frequency (RF) signal input end of power amplifier, and described can be electric capacity every straight module.
The output signal of D/A converter module can be passed through the high frequency choke module earlier, send to the control end of power amplifier afterwards again after superimposed with the original control signal of power amplifier, its effect is perfectly straight stream, intercept high-frequency signal, prevent that the original radio-frequency input signals of power amplifier from flowing into D/A converter module, described high frequency choke module can be inductance or quarter-wave line of little generation.
Described detection module can be a digital temperature sensor.
Described control module can be digital signal processor (Digital Signal Processing, DSP), also can be micro controller unit (Micro-Controller Unit, MCU).
Described D/A converter module can be a digital to analog converter, also can be digital regulation resistance.
Introduce the data transmission procedure of power amplifier current control circuit below:
At first, temperature detecting module testing environment temperature value, and this temperature value sent to control module.
Then, control module receives the temperature value that temperature detecting module is sent, and according to this temperature value, question blank 1, obtain the control signal value of the operating current of holding power amplifier under this temperature power amplifier when constant, and the difference of this working current value and preset value is outputed to D/A converter module.
The working current value that D/A converter module sends control module and the pairing conversion of signals of difference of preset value are analog signal, output to the control end of power amplifier by high frequency choke.
Though this method is the current value of control power amplifiers more accurately, vary with temperature table if all need to do in advance temperature experiment to obtain grid voltage for each power amplifier, can waste a lot of energy; And if the grid voltage of all shared power amplifier of most power amplifier varies with temperature table, can influence the precision of temperature-compensating again because of the discreteness of device.
Above-mentioned two kinds of methods that power amplifier is carried out temperature-compensating can be summed up as indirect compensation method, indirect compensating temperature of power amplifier method will certainly be influenced by the discreteness of device, individual devices compensation effect in promptly might causing in batches is bad, thereby reduces the index percent of pass; In order to remedy the discreteness of indirect temperature compensation, have to adopt more powerful power amplification organ pipe, to guarantee the linear index of power amplifier under full temperature scope in batches, this has wasted device cost and power-efficient to a great extent.
Summary of the invention
One object of the present invention just provides a kind of power amplifier temperature compensation device, and is constant with the working current value of more accurate holding power amplifier.
Power amplifier temperature compensation device of the present invention is used for power amplifier is carried out temperature-compensating, comprises detection module, analog-to-digital conversion module, control module and D/A converter module,
Described detection module is used for obtaining its corresponding voltage value according to the working current value of detected power amplifier, and sends to analog-to-digital conversion module;
The magnitude of voltage that described analog-to-digital conversion module is used for receiving is converted to digital signal value, and sends to control module;
Described control module is used for obtaining adjusted value according to the digital signal value and the preset value that receive, and sends to D/A converter module;
Described D/A converter module is used for the adjusted value corresponding simulating signal that receives is sent to the control end of power amplifier.
During greater than preset value, the adjusted value that obtains is the reverse voltage of a step-length to described control module at digital signal value.
During less than preset value, the whole value that obtains is the forward voltage of a step-length to described control module at digital signal value.
The pairing digital voltage value of operating current when described preset value is the power amplifier quiescent operation.
In tdd systems, described control module also is used for sending triggering signal at the protection time slot to detection module;
Described detection module also is used for after receiving triggering signal, the working current value of detection power amplifier.
Described power amplifier temperature compensation device also comprises trigger module, is used for sending triggering signal at the protection time slot of tdd systems to control module;
Described control module is further used for after receiving triggering signal, the working current value of detection trigger module detection power amplifier.
Described power amplifier temperature compensation device also comprises: the amplifier module after being used for the analog signal that D/A converter module sends carried out processing and amplifying, sends to the control end of power amplifier.
Described detection module is a current sensor.
Described control module is digital signal processor or micro controller unit.
Described D/A converter module is digital to analog converter or digital regulation resistance.
Another object of the present invention is to, a kind of compensating temperature of power amplifier method is provided.
Compensating temperature of power amplifier method of the present invention is used for power amplifier is carried out temperature-compensating, may further comprise the steps:
Steps A) working current value of detection power amplifier;
Step B) according to pairing magnitude of voltage of the working current value of power amplifier and preset value, obtains adjusted value;
Step C) the pairing analog signal of described adjusted value is sent to the control end of power amplifier.
Described step C) also comprise: pairing analog signal of described adjusted value and the original control signal of power amplifier superpose.
Described steps A) is: the working current value of detection power amplifier in the protection time slot of tdd systems.
The pairing digital voltage value of operating current when described preset value is the power amplifier quiescent operation.
Described step B) may further comprise the steps:
When magnitude of voltage during greater than preset value, adjusted value is the reverse voltage value of a step-length.
Described step B) may further comprise the steps:
When magnitude of voltage during less than preset value, adjusted value is the forward voltage values of a step-length.
Described step C) in, before the pairing analog signal of described adjusted value is sent to the control end of power amplifier, described analog signal is amplified.
Power amplifier temperature compensation device of the present invention and method can directly be monitored the working current value with compensating power amplifier in real time, thereby the working current value of more accurate control power amplifiers, the working current value of holding power amplifier is constant, needn't consider the discreteness of device fully, guarantee the linear index of power amplifier under full temperature scope in batches, improve production efficiency and power-efficient and at utmost brought into play the performance of power amplifier self, save device cost, improved power-efficient.
Description of drawings
Fig. 1 is the schematic diagram that concerns of the leakage level quiescent current of power amplification organ pipe and grid voltage;
Fig. 2 is the module map of existing power amplifier temperature compensation device;
Fig. 3 is the module map of power amplifier temperature compensation device of the present invention;
Fig. 4 is the map of current of the specific embodiment of power amplifier temperature compensation device of the present invention;
Fig. 5 is the flow chart of compensating temperature of power amplifier method of the present invention.
Embodiment
Basic thought of the present invention is: with the operating current of power amplifier as negative-feedback signal, according to this negative-feedback signal to power amplifier carry out in real time, direct signal compensation, made full use of the performance of power amplifier, do not need to reserve surplus on the index for the device discreteness, provide cost savings greatly, improved production efficiency.
Below, will introduce power amplifier temperature compensation device of the present invention with reference to figure 3.
Fig. 3 shows the module map of power amplifier temperature compensation device of the present invention.As shown in Figure 3, power amplifier temperature compensation device of the present invention is used for power amplifier is carried out temperature-compensating, comprising:
Detection module, analog-to-digital conversion module, control module and D/A converter module, wherein,
Described detection module is used for the working current value of detection power amplifier, obtains the pairing magnitude of voltage of this working current value according to this working current value, and sends to analog-to-digital conversion module.Because detection module is the working current value of detection power amplifier in real time directly, thus the working current value of control power amplifiers more accurately.
Described analog-to-digital conversion module is used to receive the magnitude of voltage that sends from detection module, and this magnitude of voltage is converted to digital signal value, sends to control module;
Described control module is used to receive the digital signal value that sends from analog-to-digital conversion module, obtains adjusted value according to this digital signal value and preset value, and this adjusted value is sent to D/A converter module.
It is described that to obtain adjusted value according to this digital signal value and preset value be that described digital signal value is compared with preset value, if described digital signal value greater than preset value, adjusted value is the reverse voltage value of a step-length; If described digital signal value is less than preset value, adjusted value is the forward voltage values of a step-length; If described digital signal value equals preset value, adjusted value is zero.
Described preset value is set in advance in the control module, and its value is the pairing digital voltage value of the operating current of power amplifier when quiescent operation in normal operation.
Because the working current value of the power amplifier that control module is sent according to detection module in real time sends adjusted value, can directly monitor the working current value with compensating power amplifier in real time, the working current value of holding power amplifier is constant.
Described analog-to-digital conversion module can be in detection module, also can be in control module.
Described D/A converter module is used to receive the adjusted value that control module sends, and will be worth the control end that pairing analog signal sends to power amplifier, and is superimposed with the original control signal of power amplifier.The original radio-frequency input signals of power amplifier is a high-frequency signal.The output signal of D/A converter module is a low frequency signal.
The original radio-frequency input signals of power amplifier can be by sending to the control end of power amplifier after the analog signal of straight module and D/A converter module output is superimposed, its effect is logical the interchange, intercept low frequency signal, the low frequency signal that prevents D/A converter module output flows to the original rf inputs of power amplifier, and described can be electric capacity every straight module.Based on same effect, the operating current of power amplifier can be by being input to detection module every straight module.Described can be electric capacity every straight module.
Send to the control end of power amplifier after the operating current of D/A converter module is can be by high frequency choke module and the original control signal of power amplifier superimposed, its effect is perfectly straight stream, intercept high-frequency signal, prevent that the original radio-frequency input signals of power amplifier from flowing into D/A converter module, described high frequency choke module can be an inductance.Based on same effect, the input of power amplifier is exported the radio frequency output signal by one every straight module.Described high frequency choke module can be inductance or quarter-wave line of little generation.Described can be electric capacity every straight module.
Described power amplifier temperature compensation device is used for tdd systems; described control module can also be used to receive the radio frequency synchronizing information that base station, broadcasting or cable TV send; and according to this synchronizing information; count pulse is carried out synchronously; at time division duplex (Time Division Duplex; TDD) detection trigger module in the protection time slot of system makes detection module begin the working current value of detection power amplifier.
Further; the protection time slot of described TDD comprises power amplifier response time section and quiet hour section; described protection time slot is divided into two sections: the previous time period is a power amplifier response time section; its length is the response time of power amplifier; time period of back is the quiet hour section, and its length is the response time that the protection time slot of TDD deducts power amplifier.
Here the response time that is noted that power amplifier can be obtained with known method by those skilled in the art.
Described control module is the detection trigger module in the quiet hour section of the protection time slot of tdd systems, makes detection module begin the working current value of detection power amplifier.
This trigger module is in the protection time slot of TDD system, and the reason of detection trigger module is as follows:
In the TDD system, for time of guaranteeing to receive and dispatch isolates and raises the efficiency, the power amplifier of down link only works in sending time slots, turn-offs at receiving slot; In like manner, the power amplifier of up link also only works in receiving slot, turn-offs at sending time slots.Between sending time slots and receiving slot; one segment protect time slot is arranged; this the protection time slot for the previous period in; the power amplifier of up link and down link all is in open mode; there is not radiofrequency signal this moment; be equivalent to power amplifier and work in static state, therefore, can utilize the current value of detection power amplifier during this period of time.
Power amplifier temperature compensation device of the present invention can also comprise trigger module; described trigger module is used to receive the radio frequency synchronizing information that base station, broadcasting or cable TV send; and according to this synchronizing information; count pulse is carried out synchronously; at time division duplex (Time Division Duplex; TDD) send triggering signal to control module in the protection time slot of system; control module receives detection trigger module after this triggering signal, makes detection module begin the working current value of detection power amplifier.This trigger module can be programmable logic device comprise field programmable gate array (Field Programmable Gate Array, FPGA) or CPLD (Complex Programmable Logic Device, CPLD).
Further, the protection time slot of described tdd systems comprises power amplifier response time section and quiet hour section, and described trigger module sends triggering signal in the quiet hour Duan Zhongxiang of the protection time slot of tdd systems control module.
Described device further comprises: the amplifier module, the analog signal of described D/A converter module was carried out processing and amplifying by the amplifier module to described analog signal earlier before superposeing with original control signal and sending to the control end of power amplifier.Described amplifier module is used to isolate high-frequency signal, and the pairing analog signal of adjusted value is transformed on the scope of grid voltage work, has improved control precision.Described amplifier module can be an operational amplifier.
Described detection module can be a current sensor.Transducer can be a digital sensor, also can be analog sensor.
Described control module can be digital signal processor (Digital Signal Processing, DSP), also can be micro controller unit (Micro-Controller Unit, MCU).
Described analog-to-digital conversion module can be an analog to digital converter.
Described D/A converter module can be a digital to analog converter, also can be digital regulation resistance.
Below, will introduce the map of current of the specific embodiment of power amplifier temperature compensation device of the present invention with reference to figure 4.
Fig. 4 shows the circuit diagram of the specific embodiment of power amplifier temperature compensation device of the present invention, as shown in Figure 4, the corresponding above-mentioned detection module of current sensor, the corresponding above-mentioned analog-to-digital conversion module of analog to digital converter, the corresponding above-mentioned control module of DSP, the corresponding above-mentioned D/A converter module of digital to analog converter, the corresponding above-mentioned amplifier module of operational amplifier, the corresponding above-mentioned high frequency choke module of inductance, electric capacity is corresponding above-mentioned every straight module.
Power amplifier is that example describes with the metal-oxide-semiconductor.
The radio frequency input voltage Rin of power amplifier is input to the grid G end of metal-oxide-semiconductor by electric capacity, and the input current value of the drain D end of control metal-oxide-semiconductor is drawn the radio frequency output voltage Rout of power amplifier from the D end of metal-oxide-semiconductor by electric capacity;
CPLD receives the radio frequency synchronizing information that base station, broadcasting or cable TV send, and according to this synchronizing information, count pulse is carried out synchronously, when the protection time slot of TDD system arrives, send triggering signal to DSP, DSP receives trigger current transducer after this triggering signal, makes current sensor begin static input current value by the D end of capacitance detecting metal-oxide-semiconductor;
Current sensor senses is behind the input current value I of the D end of metal-oxide-semiconductor, this current value is thought that corresponding voltage value sends to analog to digital converter, analog-to-digital conversion module is converted to digital signal value with this magnitude of voltage and sends to DSP, DSP obtains adjusted value according to the digital signal value and the preset value of analog-to-digital conversion module output, and this adjusted value is sent to digital to analog converter;
Digital to analog converter receives the adjusted value that DSP sends, and will be worth the grid G end that pairing analog signal sends to metal-oxide-semiconductor, superimposed with the original control signal of grid G end of metal-oxide-semiconductor, control signal and original control signal by feedback are superimposed, the input current value of the drain D end of control metal-oxide-semiconductor, thus realize temperature-compensating.
Present embodiment is an example with above-mentioned device only, and power amplifier temperature compensation device of the present invention is described, does not limit power amplifier temperature compensation device of the present invention.
Below, will introduce compensating temperature of power amplifier method of the present invention with reference to figure 5.
Fig. 5 shows the flow chart of compensating temperature of power amplifier method of the present invention, and detailed process is as follows:
Before compensating temperature of power amplifier method of the present invention begins, need in control module, write preset value, its value is the pairing digital voltage value of the operating current of power amplifier when quiescent operation in normal operation.
Then carry out following steps:
Step 101) the radio frequency synchronizing information of utilizing base station, broadcasting or cable TV to launch; and according to this synchronizing information; count pulse is carried out synchronously; the working current value of detection power amplifier in the protection time slot of TDD system obtains the pairing magnitude of voltage of this working current value according to this working current value.
Further; the protection time slot of described TDD comprises power amplifier response time section and quiet hour section; described protection time slot is divided into two sections: the previous time period is a power amplifier response time section; its length is the response time of power amplifier; time period of back is the quiet hour section, and its length is the response time that the protection time slot of TDD deducts power amplifier.In step 101) in, the working current value of detection power amplifier in the quiet hour section of the protection time slot of tdd systems.
Here the response time that is noted that power amplifier can be obtained with known method by those skilled in the art.
By directly monitoring the working current value of power amplifier, the working current value of control power amplifiers more accurately in real time.
Step 102) according to pairing magnitude of voltage of the working current value of power amplifier and preset value, obtains adjusted value.
Method according to pairing magnitude of voltage of the working current value of power amplifier and preset value is that the pairing magnitude of voltage of the working current value of described power amplifier is compared with preset value, if described magnitude of voltage is greater than preset value, adjusted value is the reverse voltage value of a step-length; If described magnitude of voltage is less than preset value, adjusted value is the forward voltage values of a step-length; If described magnitude of voltage equals preset value, adjusted value is zero.
Step 103) the pairing analog signal of described adjusted value is sent to the control end of power amplifier.
Pairing analog signal of described adjusted value and the original control signal of power amplifier superpose.
Further, in described step 103) in before the original control signal stack of the pairing analog signal of this adjusted value and power amplifier, the control end of power amplifier will be input to after the pairing analog signal amplification of this adjusted value, its effect is to isolate high-frequency signal, and the pairing analog signal of adjusted value is transformed on the scope of grid voltage work, improved control precision.
By sending the pairing analog signal of adjusted value to the control end of power amplifier, can directly monitor the working current value with compensating power amplifier in real time, the working current value of holding power amplifier is constant.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (17)
1. a power amplifier temperature compensation device is used for power amplifier is carried out temperature-compensating, it is characterized in that, comprises detection module, analog-to-digital conversion module, control module and D/A converter module,
Described detection module is used for obtaining its corresponding voltage value according to the working current value of detected power amplifier, and sends to analog-to-digital conversion module;
The magnitude of voltage that described analog-to-digital conversion module is used for receiving is converted to digital signal value, and sends to control module;
Described control module is used for obtaining adjusted value according to the digital signal value and the preset value that receive, and sends to D/A converter module;
Described D/A converter module is used for the adjusted value corresponding simulating signal that receives is sent to the control end of power amplifier.
2. power amplifier temperature compensation device as claimed in claim 1 is characterized in that, during greater than preset value, the adjusted value that obtains is the reverse voltage of a step-length to described control module at digital signal value.
3. power amplifier temperature compensation device as claimed in claim 1 is characterized in that, during less than preset value, the adjusted value that obtains is the forward voltage of a step-length to described control module at digital signal value.
4. as each described power amplifier temperature compensation device of claim 1 to 3, it is characterized in that the pairing digital voltage value of the operating current when described preset value is the power amplifier quiescent operation.
5. as each described power amplifier temperature compensation device of claim 1 to 3, it is characterized in that in tdd systems, described control module also is used for sending triggering signal at the protection time slot to detection module;
Described detection module also is used for after receiving triggering signal, the working current value of detection power amplifier.
6. as each described power amplifier temperature compensation device of claim 1 to 3, it is characterized in that, also comprise trigger module, be used for sending triggering signal to control module at the protection time slot of tdd systems;
Described control module is further used for after receiving triggering signal, the working current value of detection trigger module detection power amplifier.
7. as each described power amplifier temperature compensation device of claim 1 to 3, it is characterized in that, also comprise: the amplifier module after being used for the analog signal that D/A converter module sends carried out processing and amplifying, sends to the control end of power amplifier.
8. as each described power amplifier temperature compensation device of claim 1 to 3, it is characterized in that described detection module is a current sensor.
9. as each described power amplifier temperature compensation device of claim 1 to 3, it is characterized in that described control module is digital signal processor or micro controller unit.
10. as each described power amplifier temperature compensation device of claim 1 to 3, it is characterized in that described D/A converter module is digital to analog converter or digital regulation resistance.
11. a compensating temperature of power amplifier method is used for power amplifier is carried out temperature-compensating, comprising:
Steps A) working current value of detection power amplifier;
Step B) according to pairing magnitude of voltage of the working current value of power amplifier and preset value, obtains adjusted value;
Step C) the pairing analog signal of described adjusted value is sent to the control end of power amplifier.
12. compensating temperature of power amplifier method as claimed in claim 11 is characterized in that, described step C) also comprise: pairing analog signal of described adjusted value and the original control signal of power amplifier superpose.
13. compensating temperature of power amplifier method as claimed in claim 11 is characterized in that, described steps A) be: the working current value of detection power amplifier in the protection time slot of tdd systems.
14. compensating temperature of power amplifier method as claimed in claim 11 is characterized in that, the pairing digital voltage value of the operating current when described preset value is the power amplifier quiescent operation.
15., it is characterized in that described step B as each described compensating temperature of power amplifier method of claim 11 to 14) may further comprise the steps:
When magnitude of voltage during greater than preset value, adjusted value is the reverse voltage value of a step-length.
16., it is characterized in that described step B as each described compensating temperature of power amplifier method of claim 11 to 14) may further comprise the steps:
When magnitude of voltage during less than preset value, adjusted value is the forward voltage values of a step-length.
17. as each described compensating temperature of power amplifier method of claim 11 to 14, it is characterized in that, described step C) in, before the pairing analog signal of described adjusted value is sent to the control end of power amplifier, described analog signal is amplified.
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| WO2011026293A1 (en) * | 2009-09-04 | 2011-03-10 | 惠州市正源微电子有限公司 | Temperature compensating circuit for power amplifier |
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| CN106227259A (en) * | 2016-08-04 | 2016-12-14 | 深圳市华讯星通讯有限公司 | A kind of temperature control system and method |
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|---|---|---|---|---|
| WO2011026293A1 (en) * | 2009-09-04 | 2011-03-10 | 惠州市正源微电子有限公司 | Temperature compensating circuit for power amplifier |
| CN101924521A (en) * | 2010-04-27 | 2010-12-22 | 三维通信股份有限公司 | Digital bias system of radio frequency power amplifier |
| CN105467177A (en) * | 2014-08-22 | 2016-04-06 | 中兴通讯股份有限公司 | Power amplification grid voltage adjustment method and power amplification grid voltage adjustment device |
| CN106227259A (en) * | 2016-08-04 | 2016-12-14 | 深圳市华讯星通讯有限公司 | A kind of temperature control system and method |
| WO2018024021A1 (en) * | 2016-08-04 | 2018-02-08 | 深圳市华讯星通讯有限公司 | Temperature control system and method |
| CN109471390A (en) * | 2018-11-09 | 2019-03-15 | 西安麦格米特电气有限公司 | Analog signal transmission method, apparatus and microcontroller |
| CN113437984A (en) * | 2019-03-22 | 2021-09-24 | 联发科技（新加坡）私人有限公司 | Method for compensating for signal degradation during signal transmission and transmitter using the same |
| CN113437984B (en) * | 2019-03-22 | 2022-09-27 | 联发科技（新加坡）私人有限公司 | Method for compensating for signal degradation during signal transmission and transmitter using the same |
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|---|---|
| CN100589319C (en) | 2010-02-10 |
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