CN101944884B - Automatic compensating device and method for grid voltage of power amplification module - Google Patents
Automatic compensating device and method for grid voltage of power amplification module Download PDFInfo
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- CN101944884B CN101944884B CN2010102919277A CN201010291927A CN101944884B CN 101944884 B CN101944884 B CN 101944884B CN 2010102919277 A CN2010102919277 A CN 2010102919277A CN 201010291927 A CN201010291927 A CN 201010291927A CN 101944884 B CN101944884 B CN 101944884B
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Abstract
The invention discloses an automatic compensating device for the grid voltage of a power amplification module. The device comprises a power amplification module circuit, a temperature sensor circuit, an A/D circuit, a D/A circuit and a microprogrammed control unit (MCU) control circuit, wherein the temperature sensor circuit comprises a temperature inductor which is used for inducting the temperature of a corresponding power amplification tube in the power amplification module circuit; the output end of the temperature sensor circuit is connected with the input end of the MCU control circuit; the output end of the A/D circuit is connected with the input end of the MCU control circuit; and the output end of the MCU control circuit is connected with the input end of the D/A circuit. The invention also discloses an automatic compensating method for the grid voltage of the power amplification module. The quiescent operation point of the power amplification tube is better kept constant by the device and the method.
Description
Technical field
The present invention relates to a kind of communication system intermediate power amplifier field, relate in particular to a kind of power amplifier module grid voltage autocompensation installation and method.
Background technology
The quiescent point of RF power amplification pipe has temperature characterisitic, and its static working current changes the indexs such as gain, efficient and linearity of the system that can influence.Therefore, keeping the quiescent point of power tube at work constant is one of power amplifier module key for design point.The quiescent point of keeping power tube is constant just to need real-time operating state offset gate pole tension by power amplifier module, and the grid voltage compensation scheme of industry mainly contains two kinds now: the digital temperature compensation of thermosensitive circuit simulation temperature compensation and table-look-up type.
The principle of thermosensitive circuit simulation temperature compensation is: utilize the temperature characterisitic of temperature-sensitive device to drive triode change output voltage, control the grid of power tube again with this voltage.Reach the grid voltage of power tube is changed with variations in temperature, keep the constant purpose of static working current.The advantage of this scheme is: circuit is simple, with low cost; Shortcoming is: the consistency temperature bad, temperature-sensitive device of debugging trouble, finished product power amplifier is floated the temperature that curve is difficult to cover power tube and is floated curve.
The principle of table-look-up type numeral temperature compensation is: the temperature variant grid voltage compensation meter that utilizes single-chip microcomputer and EEPROM to store, cycle detection temperature and table look-up according to temperature value and to obtain grid voltage offset during work is exported control voltage through digital to analog converter again.The advantage of this scheme is: can simulate the line segment of different curvature, because the temperature characterisitic of power tube neither be linear fully, therefore can make perfect temperature compensation curve; The shortcoming of this scheme is: when not considering overtemperature to the protection of power tube and compensation, store the temperature compensation data with EEPROM independently and cause cost to increase, do not consider pressing the influence of variation with Louing the power tube quiescent point.
Summary of the invention
To the temperature of the temperature-sensitive device that exists in power amplifier module grid voltage compensation arrangement that exists in the prior art and the compensation method float the temperature that curve is difficult to cover power tube float curve, when not having overtemperature to the protection of power tube; Do not consider to leak the problem that influences that changes the power tube quiescent point of pressing yet, therefore be necessary to provide a kind of power amplifier module grid voltage autocompensation installation and method to solve these problems.
The present invention provides a kind of power amplifier module grid voltage autocompensation installation, it is characterized in that, comprises power amplifier module circuit, temperature sensor circuit, A/D circuit, D/A circuit, MCU control circuit; Said temperature sensor circuit comprises temperature inductor, and in order to the temperature of corresponding power tube in the induction power amplifier module circuit, the input of the output of said temperature sensor circuit and said MCU control circuit has annexation; The input of the output of said A/D circuit and said MCU control circuit has annexation, and the input of the output of said MCU control circuit and said D/A circuit has annexation.
The present invention also provides a kind of power amplifier module grid voltage automatic compensating method, and it comprises following steps:
(1) with the data of power amplifier module: normal temperature grid voltage compensation meter, overtemperature grid voltage penalty coefficient, leak and press subregion grid voltage offset table, match temperature compensation curve to use three ordered coefficients, deposit in respectively among the Flash of MCU;
(2) temperature sensor reads the temperature value T of corresponding power tube
Currently
(3) whether good according to the variations in temperature linearity of power tube index, adopt and to read the grid voltage offset that normal temperature grid voltage compensation meter or calculation mode obtain Current Temperatures;
(4) if T
CurrentlyTemperature surpass power tube normal working temperature scope, according to overtemperature grid voltage penalty coefficient, draw: overtemperature grid voltage offset=(T
Currently-overtemperature direct limit temperature value) * 1 penalty coefficient of overtemperature; If the not ultra normal working temperature scope of the temperature of power tube, then overtemperature grid voltage offset=0;
(5) continuous several times detects the leakage pressure value of power amplifier; Get its mean value then; If this mean value in leaking the leakage pressure scope of pressing the definition of subregion grid voltage offset table, reads the grid voltage deviant of Lou pressing subregion grid voltage offset table to obtain the power tube under the current leakage press strip spare; If in leaking any one zone of pressing subregion grid voltage offset table, then D/A does not output to the grid-control voltage zero setting of power tube to this mean value;
(6) grid voltage offset=normal temperature grid voltage offset+overtemperature grid voltage offset+grid voltage deviant, obtain the grid voltage offset after, control D/A upgrades output voltage.
Preferably, be that power amplifier module powers on after, in all passages output no-voltages of initial phase D/A control.If the variations in temperature linearity of power tube index is bad, then reads normal temperature grid voltage offset table and obtain normal temperature grid voltage offset; If T
CurrentlyThe normal working temperature scope that surpasses power amplifier module is that pointer reads normal temperature grid voltage compensation meter and obtains normal temperature grid voltage offset with the limiting temperature of overtemperature direction then.If the variations in temperature linearity of power tube index is good, then read match temperature compensation curve obtains this power tube with three subsystem numerical tables coefficient of first order K
1, quadratic coefficients K
2, three ordered coefficients K
3, reference temperature value T
RefWith with reference to grid voltage value V
Ref, normal temperature grid voltage offset=V
Ref+ K
1* (T
Currently-T
Ref)+K
2* (T
Currently-T
Ref)
2+ K
3* (T
Currently-T
Ref)
3If, T wherein
CurrentlySurpass the normal working temperature scope of power amplifier module, then the limiting temperature substitution formula with the overtemperature direction calculates normal temperature grid voltage offset.
Whether the variations in temperature linearity of power tube index well is meant among the present invention: if the temperature that can simulate power tube with one time three ordered coefficients match is floated curve, think that then the variations in temperature linearity of power tube index is good.If the temperature with one time three ordered coefficients match can not simulate power tube is floated curve, think that then the variations in temperature linearity of power tube index is bad.
Beneficial effect of the present invention: the present invention can be lower than the power of compensation power amplifier under the situation of lower limit in ambient temperature; Variations in temperature linearity difference through identification power tube index selects diverse ways to obtain normal temperature grid voltage offset; To the bad power tube of the linearity, can obtain normal temperature grid voltage offset more accurately through reading normal temperature grid voltage compensation meter; Power tube for the linearity is good is then obtained normal temperature grid voltage offset through calculating.Making does not need independent memory just can realize the storage to the temperature compensation data, has reduced the requirement to the Flash space.The influence of pressure variation to the power tube quiescent point leaked in protection and consideration to power tube during through overtemperature; Protection is attacked to put and is managed not Yin Wendu and surpass the normal working temperature scope and damage; Change adjustment grid voltage offset to leaking to press, the quiescent point of better keeping power tube is constant.
Figure of description
Fig. 1 is a power tube grid voltage compensation flow chart;
Fig. 2 is a normal temperature grid voltage compensation meter;
Fig. 3 is an overtemperature grid voltage penalty coefficient table;
Fig. 4 leaks to press subregion grid voltage offset table;
Fig. 5 is that match temperature compensation curve is with three subsystem numerical tables;
Fig. 6 is the realization circuit of grid voltage compensation.
Embodiment
Specify embodiment of the present invention below in conjunction with Figure of description.
Power tube grid voltage compensation flow chart as shown in Figure 1 is after power amplifier module powers on, in all passage output no-voltages of initial phase order D/A, with the protection power tube.
Get into cycle detection and compensation work flow process after the power amplifier module initialization is accomplished, the workflow of each circulation is following:
(1) with the data of power amplifier module: Fig. 2 normal temperature grid voltage compensation meter, Fig. 3 overtemperature grid voltage penalty coefficient table, Fig. 4 leak and press subregion grid voltage offset table, Fig. 5 match temperature compensation curve with three ordered coefficients, deposit among the Flash of MCU respectively;
(2) temperature sensor reads the temperature value T of corresponding power tube
Currently
(3) whether good according to the variations in temperature linearity of power tube index, read normal temperature grid voltage compensation meter or calculate normal temperature grid voltage offset;
(4) if T
CurrentlyTemperature surpass power tube normal working temperature scope, according to overtemperature grid voltage penalty coefficient, draw: overtemperature grid voltage offset=(T
Currently-overtemperature direct limit temperature value) * 1 penalty coefficient of overtemperature; If the not ultra normal working temperature scope of the temperature of power tube, then overtemperature grid voltage offset=0;
(5) continuous several times (as 10-20 time) detects the leakage pressure value of power amplifier; Get its mean value then; If this mean value in leaking the leakage pressure scope of pressing the definition of subregion grid voltage offset table, reads the grid voltage deviant of Lou pressing subregion grid voltage offset table to obtain the power tube under the current leakage press strip spare; If in leaking any one zone of pressing subregion grid voltage offset table, then D/A does not output to the grid-control voltage zero setting of power tube to this mean value;
(6) grid voltage offset=normal temperature grid voltage offset+overtemperature grid voltage offset+grid voltage deviant, obtain the grid voltage offset after, control D/A upgrades output voltage.
Preferably, if the variations in temperature linearity of index is bad, then reads normal temperature grid voltage offset table and obtain normal temperature grid voltage offset; If T
CurrentlyThe normal working temperature scope that surpasses power amplifier module is that pointer reads normal temperature grid voltage compensation meter and obtains normal temperature grid voltage offset with the limiting temperature of overtemperature direction then.If the variations in temperature linearity of power amplifier index is bad, then read match temperature compensation curve obtains this power tube with three subsystem numerical tables coefficient of first order K
1, quadratic coefficients K
2, three ordered coefficients K
3, reference temperature value T
RefWith with reference to grid voltage value V
Ref, normal temperature grid voltage offset=V
Ref+ K
1* (T
Currently-T
Ref)+K
2* (T
Currently-T
Ref)
2+ K
3* (T
Currently-T
Ref)
3If, T wherein
CurrentlySurpass the normal working temperature scope of power amplifier module, then the limiting temperature substitution formula with the overtemperature direction calculates normal temperature grid voltage offset.
Whether the variations in temperature linearity of power tube index well is meant among the present invention: if the temperature that can simulate power tube with one time three ordered coefficients match is floated curve, think that then the variations in temperature linearity of power tube index is good.If the temperature with one time three ordered coefficients match can not simulate power tube is floated curve, think that then the variations in temperature linearity of power tube index is bad.
As shown in Figure 6, the present invention also provides a kind of power amplifier module grid voltage autocompensation installation, it is characterized in that, comprises power amplifier module circuit, temperature sensor circuit, A/D circuit, D/A circuit, MCU control circuit; Said temperature sensor circuit comprises temperature inductor, and in order to the temperature of corresponding power tube in the induction power amplifier module circuit, the input of the output of said temperature sensor circuit and said MCU control circuit has annexation; The input of the output of said A/D circuit and said MCU control circuit has annexation, and the input of the output of said MCU control circuit and said D/A circuit has annexation.If power amplifier module can be selected the A/D of independent high resolution for use to the variation sensitivity of leak pressing, if power amplifier module is insensitive then A/D that available MCU carries realizes pressure measuring ability with Louing to leaking the variation of pressing; The selecting for use of MCU will consider that inner Flash space enough deposits parameter list and temperature compensation data; Temperature sensor is placed on from the nearest place of target power tube as far as possible, because the temperature difference of the power tubes at different levels of the high-power power amplifier module of part is bigger, suggestion every the needs of trying one's best carry out all placing a temperature sensor near the power tube of grid voltage temperature compensation; Selecting for use of D/A will consider to carry out the power tube quantity of grid voltage compensation and the required precision of grid voltage compensation.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (4)
1. power amplifier module grid voltage automatic compensating method, it comprises following steps:
Data with power amplifier module: normal temperature grid voltage compensation meter, overtemperature grid voltage penalty coefficient, leakage press subregion grid voltage offset table, match temperature compensation curve to use three ordered coefficients, deposit in respectively among the Flash of MCU;
Temperature sensor reads the temperature value T of corresponding power tube
Currently
Whether the variations in temperature linearity of judging the power tube index is good, if, then take calculation mode to obtain the grid voltage offset of Current Temperatures, if not, then adopt the mode that reads normal temperature grid voltage compensation meter to obtain the grid voltage offset of Current Temperatures; Whether the variations in temperature linearity of said power tube index well is meant: if the temperature that can simulate power tube with one time three ordered coefficients match is floated curve, think that then the variations in temperature linearity of power tube index is good; If the temperature with one time three ordered coefficients match can not simulate power tube is floated curve, think that then the variations in temperature linearity of power tube index is bad;
If T
CurrentlyTemperature surpass power tube normal working temperature scope, according to overtemperature grid voltage penalty coefficient, draw: overtemperature grid voltage offset=(T
Currently-overtemperature direct limit temperature value) * 1 penalty coefficient of overtemperature; If the not ultra normal working temperature scope of the temperature of power tube, then overtemperature grid voltage offset=0;
The leakage pressure value of continuous detecting power amplifier is got its mean value then, if this mean value in leaking the leakage pressure scope of pressing the definition of subregion grid voltage offset table, reads the grid voltage deviant of Lou pressing subregion grid voltage offset table to obtain the power tube under the current leakage press strip spare; If in leaking any one zone of pressing subregion grid voltage offset table, then D/A does not output to the grid-control voltage zero setting of power tube to this mean value;
Grid voltage offset=normal temperature grid voltage offset+overtemperature grid voltage offset+grid voltage deviant, obtain the grid voltage offset after, control D/A upgrades output voltage.
2. power amplifier module grid voltage automatic compensating method as claimed in claim 1, it is characterized in that power amplifier module powers on after, in all passages output no-voltages of initial phase D/A control.
3. according to claim 1 or claim 2 power amplifier module grid voltage automatic compensating method is characterized in that if the variations in temperature linearity of index is bad, then reads normal temperature grid voltage offset table and obtains normal temperature grid voltage offset; If T
CurrentlyThe normal working temperature scope that surpasses power amplifier module is that pointer reads normal temperature grid voltage compensation meter and obtains normal temperature grid voltage offset with the limiting temperature of overtemperature direction then.
4. according to claim 1 or claim 2 power amplifier module grid voltage automatic compensating method is characterized in that the variations in temperature linearity of index is good, then reads match temperature compensation curve obtains this power tube with three subsystem numerical tables coefficient of first order K
1, quadratic coefficients K
2, three ordered coefficients K
3, reference temperature value T
RefWith with reference to grid voltage value V
Ref, normal temperature grid voltage offset=V
Ref+ K
1* (T
Currently-T
Ref)+K
2* (T
Currently-T
Ref)
2+ K
3* (T
Currently-T
Ref)
3
Wherein, if T
CurrentlySurpass the normal working temperature scope of power amplifier module, then the limiting temperature substitution formula with the overtemperature direction calculates normal temperature grid voltage offset.
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| CN103477556B (en) * | 2013-02-27 | 2017-09-29 | 华为技术有限公司 | A kind of constant method and device of quiescent current of holding 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 |
| CN106646032A (en) * | 2016-11-25 | 2017-05-10 | 天津津航计算技术研究所 | Impedance automatic compensation module for temperature test |
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| CN1193224A (en) * | 1997-01-31 | 1998-09-16 | 三星电子株式会社 | Method for controlling radio signal power according to variation of frequency and temp. in paging signal-emission machine |
| CN101030760A (en) * | 2006-12-27 | 2007-09-05 | 京信通信技术(广州)有限公司 | Self-adaptive grid-voltage compensator and its compensation |
| CN101299595A (en) * | 2008-06-24 | 2008-11-05 | 芯通科技（成都）有限公司 | Method and apparatus system for compensating temperature of power amplifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3976567B2 (en) * | 2001-12-26 | 2007-09-19 | シャープ株式会社 | Power amplifying device and communication device using the same |
| JP2007049285A (en) * | 2005-08-08 | 2007-02-22 | Seiko Instruments Inc | Chopper amplifier circuit and semiconductor device |
| US7912148B2 (en) * | 2006-08-04 | 2011-03-22 | Panasonic Corporation | Transmission circuit and communication device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193224A (en) * | 1997-01-31 | 1998-09-16 | 三星电子株式会社 | Method for controlling radio signal power according to variation of frequency and temp. in paging signal-emission machine |
| CN101030760A (en) * | 2006-12-27 | 2007-09-05 | 京信通信技术(广州)有限公司 | Self-adaptive grid-voltage compensator and its compensation |
| CN101299595A (en) * | 2008-06-24 | 2008-11-05 | 芯通科技（成都）有限公司 | Method and apparatus system for compensating temperature of power amplifier |
Non-Patent Citations (2)
| Title |
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| JP特开2003-198294A 2003.07.11 |
| JP特开2007-49285A 2007.02.22 |
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