CN102968145A - Temperature self-adaptive adjusting method of power amplifier module working voltage - Google Patents
Temperature self-adaptive adjusting method of power amplifier module working voltage Download PDFInfo
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- CN102968145A CN102968145A CN2012104429144A CN201210442914A CN102968145A CN 102968145 A CN102968145 A CN 102968145A CN 2012104429144 A CN2012104429144 A CN 2012104429144A CN 201210442914 A CN201210442914 A CN 201210442914A CN 102968145 A CN102968145 A CN 102968145A
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- power tube
- amplifier module
- power amplifier
- solid state
- reliability
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Abstract
The invention relates to a temperature self-adaptive adjusting technology and a method of power amplifier module working voltage. A microwave solid state power amplifier module is used as a basic unit of a microwave signal solid state transmitter system, and the reliability of the microwave solid state power amplifier module directly determines the reliability of the entire solid state transmitter system. However, the heat effect of a microwave power tube directly results in substantially reducing of the reliability and service life of the microwave solid state power amplifier module and even burns out the microwave solid state power amplifier module, and thereby the normal working of the entire system is affected. According to the designing technology and the method, a feedback voltage self-adaptive adjusting circuit formed by devices of a voltage regulator block, a thermistor and the like is utilized, when the temperature of the power tube is increased, the resistance value of the thermistor is increased, thereby the bias voltage of the power tube is decreased, the heat consumption of the power tube is decreased, and long term and reliable working of the power tube is guaranteed. Though voltage reducing results in decreasing of power tube gain, the decreasing amplitude of the power tube gain is small, and thereby influence on the system performance is not severe. The circuit is simple in structure, practical and capable of remarkably improving the reliability of the power tube.
Description
Technical field
The invention belongs to Analog Electronics Technique, a kind of temperature self-adaptation adjusted design method of power amplifier module operating voltage.
Background technology
The solid state microwave power amplifier is more and more extensive in the application in the fields such as radar, radio communication, and the solid state microwave power amplifier module is as the elementary cell of solid-state power amplifier, and its reliability has directly determined the reliability of solid state microwave power amplifier even whole solid state transmitter system.The thermal effect of the core of power amplifier module---Microwave Power Tubes can cause its reliability and life-span to be declined to a great extent, even burns.Thereby have influence on the normal operation of whole system.Designing technique in this explanation and method are used a kind of temperature self-adaptation regulating circuit of voltage, and this circuit is comprised of regulator block LT1084, thermistor CRZ-2005, temperature relay and some resistance capacitances.When the power tube temperature rises, thereby the thermistor resistance becomes large so that the bias voltage of power tube also descends, and then the hear rate of power tube also descends guaranteed output pipe range phase reliably working.Although voltage drop can cause the power tube gain to reduce, the range of decrease is also little, and system performance be there is no too large impact.This circuit structure is simple and practical, and is remarkable to the effect that improves the power tube reliability.
Summary of the invention
The present invention relates to a kind of technology and method of temperature self-adaptation adjusting of power amplifier module operating voltage.
The technical solution that realizes the object of the invention is: the present invention adopts the adjustable regulator block of the LT1084 of LINEAR company and peripheral circuit thereof to form.Its Output Voltage Formula is Vout=Vref(1+ (R3+R4)/(R2//R1))+Iref * R2[sees Fig. 1].Wherein R2 is thermistor CRZ-2005, and its resistance from 500 to 596.98 Ω between 0～50 ℃ are almostlinear to be changed.Thermistor is fixed on the power tube shell, and when the power tube temperature rose, it is large that the thermistor resistance becomes, and can find out that by above formula this moment, Vout also can reduce.Thereby reduce the thermal value of power tube so that its temperature clock remains on proper range.In addition, this circuit also has overheat protective function.If further rise because certain abnormal conditions cause the power tube case temperature, arrive hazardous location (more than 60 ℃ time) just the time temperature relay that is connected in parallel on the R4 can conducting, with the R4 short circuit.Output voltage is avoided the overheated fusing of tube core with drop by half at this moment.
The present invention compared with prior art, its remarkable advantage is: guaranteed output pipe range phase reliably working.Although voltage drop can cause the power tube gain to reduce, the range of decrease is also little, and system performance be there is no too large impact.This circuit structure is simple and practical, and is remarkable to the effect that improves the power tube reliability.
Description of drawings
Fig. 1 is the temperature self-adaptation regulating circuit figure of power amplifier module operating voltage.
Embodiment
The present invention adopts the adjustable regulator block of the LT1084 of LINEAR company and peripheral circuit thereof to form.Its Output Voltage Formula is Vout=Vref(1+ (R3+R4)/(R2//R1))+Iref * R2(sees Fig. 1).Wherein R2 is thermistor CRZ-2005, and its resistance from 500 to 596.98 Ω between 0～50 ℃ are almostlinear to be changed.Thermistor is fixed on the power tube shell, and when the power tube temperature rose, it is large that the thermistor resistance becomes, and can find out that by above formula this moment, Vout also can reduce.Thereby reduce the thermal value of power tube so that its temperature clock remains on proper range.In addition, this circuit also has overheat protective function.If further rise because certain abnormal conditions cause the power tube case temperature, when arriving hazardous location (more than 60 ℃), be connected in parallel on temperature relay on the R4 just can conducting with the R4 short circuit, this moment output voltage with drop by half, avoid tube core to fuse because moment is overheated.
The present invention compared with prior art, its remarkable advantage is: guaranteed output pipe range phase reliably working.Although voltage drop can cause the power tube gain to reduce, the range of decrease is also little, and system performance be there is no too large impact.This circuit structure is simple and practical, and is remarkable to the effect that improves the power tube reliability.
Claims (1)
1. the temperature self-adaptation control method of a power amplifier module operating voltage, it is characterized in that: a kind of reaction type voltage self-adaptation regulation technology that is consisted of by devices such as regulator block, thermistors, can be according to the difference of power amplifier case temperature, automatically regulatory work is knocked off and is made voltage, to reach the purpose that guarantees the power tube reliability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104429144A CN102968145A (en) | 2012-11-08 | 2012-11-08 | Temperature self-adaptive adjusting method of power amplifier module working voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104429144A CN102968145A (en) | 2012-11-08 | 2012-11-08 | Temperature self-adaptive adjusting method of power amplifier module working voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102968145A true CN102968145A (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104429144A Pending CN102968145A (en) | 2012-11-08 | 2012-11-08 | Temperature self-adaptive adjusting method of power amplifier module working voltage |
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| CN (1) | CN102968145A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107092011A (en) * | 2016-02-18 | 2017-08-25 | Trw自动化简易股份公司 | Radar equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4105962A (en) * | 1975-03-21 | 1978-08-08 | Landis Tool Company | Battery charger |
| CN2149704Y (en) * | 1993-01-21 | 1993-12-15 | 张贵华 | Protector for transformer |
| CN1417915A (en) * | 2001-10-30 | 2003-05-14 | 深圳市中兴通讯股份有限公司上海第二研究所 | Circuit for continuous current-limiting point regulation and temperature protection of switching power source |
| CN1453578A (en) * | 2002-04-23 | 2003-11-05 | 马立文 | Temperature compensating circuit for gas-sensing sensor |
| CN101093699A (en) * | 2006-06-19 | 2007-12-26 | 上海乐金广电电子有限公司 | Superheating arrester of music player |
| JP2010130428A (en) * | 2008-11-28 | 2010-06-10 | Kenwood Corp | Output adjusting circuit of power amplifier |
-
2012
- 2012-11-08 CN CN2012104429144A patent/CN102968145A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4105962A (en) * | 1975-03-21 | 1978-08-08 | Landis Tool Company | Battery charger |
| CN2149704Y (en) * | 1993-01-21 | 1993-12-15 | 张贵华 | Protector for transformer |
| CN1417915A (en) * | 2001-10-30 | 2003-05-14 | 深圳市中兴通讯股份有限公司上海第二研究所 | Circuit for continuous current-limiting point regulation and temperature protection of switching power source |
| CN1453578A (en) * | 2002-04-23 | 2003-11-05 | 马立文 | Temperature compensating circuit for gas-sensing sensor |
| CN101093699A (en) * | 2006-06-19 | 2007-12-26 | 上海乐金广电电子有限公司 | Superheating arrester of music player |
| JP2010130428A (en) * | 2008-11-28 | 2010-06-10 | Kenwood Corp | Output adjusting circuit of power amplifier |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107092011A (en) * | 2016-02-18 | 2017-08-25 | Trw自动化简易股份公司 | Radar equipment |
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Application publication date: 20130313 |