JPH0575352A - Amplifier device - Google Patents
Amplifier deviceInfo
- Publication number
- JPH0575352A JPH0575352A JP3237950A JP23795091A JPH0575352A JP H0575352 A JPH0575352 A JP H0575352A JP 3237950 A JP3237950 A JP 3237950A JP 23795091 A JP23795091 A JP 23795091A JP H0575352 A JPH0575352 A JP H0575352A
- Authority
- JP
- Japan
- Prior art keywords
- output power
- amplifier
- signal
- temperature
- ambient temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、増幅装置、特に、衛星
に搭載されるトランスポンダの送信機の電力増幅に用い
て好適な増幅装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an amplifying device, and more particularly to an amplifying device suitable for use in power amplification of a transmitter of a transponder mounted on a satellite.
【０００２】[0002]
【従来の技術】衛星に搭載されている機器は、最低−３
０℃から最高＋７０℃までの範囲の周囲温度の変化に常
にさらされている。一方、送信機の出力電力は、高過ぎ
ると受信側で電力が過大となって種々の障害の原因とな
り、低過ぎると受信側の感度が低下するので、常に一定
の範囲内であることが要求される。また、電源として
は、太陽電池で発生した電力を使用するので、個々の機
器の消費電力は極力小さくかつその変動が極力小さいこ
とが望まれる。2. Description of the Related Art At least -3 devices are installed on the satellite.
Always exposed to changes in ambient temperature ranging from 0 ° C up to + 70 ° C. On the other hand, if the output power of the transmitter is too high, the power on the receiving side becomes excessive and causes various troubles, and if it is too low, the sensitivity on the receiving side decreases. To be done. Further, since the power generated by the solar cell is used as the power source, it is desired that the power consumption of each device is as small as possible and its fluctuation is also as small as possible.
【０００３】したがって、衛星に搭載されるトランスポ
ンダの送信機の電力増幅器には、１）−３０〜７０℃の
範囲で周囲温度が変化しても出力電力の値は常に一定の
範囲内に納まっていること、２）−３０〜７０℃の範囲
で周囲温度が変化しても消費電力の値が小さい範囲で安
定していること、換言すれば、効率すなわち消費電力に
対する出力電力の比が常に高いレベルにあること、が要
求される。Therefore, in the power amplifier of the transmitter of the transponder mounted on the satellite, the value of the output power is always within a certain range even if the ambient temperature changes in the range of 1) -30 to 70 ° C. 2) that even if the ambient temperature changes in the range of −30 to 70 ° C., the value of power consumption is stable in a small range, in other words, efficiency, that is, the ratio of output power to power consumption is always high. Being at a level is required.
【０００４】[0004]
【発明が解決しようとする課題】ところが、電力増幅器
に使用されるＧａＡｓＦＥＴは、ドレイン電圧が一定で
も、高温ではドレイン電流が少なくなり、低温ではドレ
イン電流が増大するという特性を有しており、出力電力
もそれに応じた変化をするという特性を有している。However, the GaAsFET used in the power amplifier has the characteristic that the drain current decreases at high temperature and increases at low temperature even if the drain voltage is constant. Electric power also has the characteristic of changing accordingly.
【０００５】したがって、図５の様な構成の増幅器１０
において、バイアス回路１２からバイアス電圧として常
に一定のドレイン電圧を供給し、出力端子１４における
信号の電力が室温で定格値となるように調整しても、そ
れより高温では出力電力が低下し、逆に低温では出力電
力が増大するとともに消費電力が著しく増大する。これ
に対処するため、出力側で出力電力の値を検出し、それ
が一定となるようにドレイン電圧の値を制御することが
考えられるが、その場合でも、低温側で消費電力が増大
し、そのため効率が低下するという問題がある。Therefore, the amplifier 10 having the configuration as shown in FIG.
In the above, even if a constant drain voltage is always supplied as the bias voltage from the bias circuit 12 and the signal power at the output terminal 14 is adjusted to be the rated value at room temperature, the output power decreases at higher temperatures, and At low temperatures, the output power increases and the power consumption increases significantly. To deal with this, it is conceivable to detect the value of output power on the output side and control the value of drain voltage so that it is constant, but even in that case, power consumption increases on the low temperature side, Therefore, there is a problem that efficiency is reduced.
【０００６】したがって本発明の目的は、予想される周
囲温度の変化範囲の全領域にわたって、出力電力変動が
所定の範囲内に納まり、かつ、消費電力が最小である増
幅装置、換言すれば、出力電力変動が小さく、かつ、効
率が最大である増幅装置を提供することにある。Therefore, an object of the present invention is to provide an amplifying device, in which the output power fluctuation is within a predetermined range and the power consumption is minimum, over the entire range of the expected change range of the ambient temperature, in other words, the output power. An object of the present invention is to provide an amplifying device with small power fluctuation and maximum efficiency.
【０００７】[0007]
【課題を解決するための手段】前述の目的を達成する本
発明の増幅装置は、入力信号を増幅して出力する増幅器
と、該増幅器の周囲温度を検出して該周囲温度に応じて
変化する温度信号を出力する温度検出器と、該増幅器の
出力電力を検出して該出力電力に応じて変化する出力電
力信号を出力する出力電力検出器と、該温度信号および
出力電力信号に応じて該増幅器へのバイアス電圧を制御
するバイアス電圧制御器とを具備することを特徴とする
ものである。SUMMARY OF THE INVENTION An amplification device of the present invention that achieves the above-mentioned object is an amplifier that amplifies and outputs an input signal, and detects the ambient temperature of the amplifier and changes it according to the ambient temperature. A temperature detector that outputs a temperature signal, an output power detector that detects the output power of the amplifier and outputs an output power signal that changes according to the output power, and a temperature detector that outputs the output power signal that changes according to the output power. And a bias voltage controller for controlling the bias voltage to the amplifier.
【０００８】[0008]
【作用】増幅器のバイアス電圧は出力電力信号だけでな
く温度信号にも依存して制御されるので、例えば、出力
電力の制御目標値を、高温ではやや高く、低温ではやや
低い値としてバイアス電圧を制御することにより、予想
される周囲温度の全領域にわたって出力電力の変動が一
定の範囲内に納まり、かつ、消費電力が最小であるよう
な制御が実現される。Since the bias voltage of the amplifier is controlled depending not only on the output power signal but also on the temperature signal, for example, the control target value of the output power is set to be slightly high at high temperatures and slightly low at low temperatures. By performing the control, it is possible to realize the control in which the fluctuation of the output power is within a certain range over the entire expected ambient temperature range and the power consumption is minimum.
【０００９】[0009]
【実施例】図１は本発明の一実施例の概略を表わす図で
ある。図５と同一の構成要素については同一の参照番号
を付す。温度検出器２０は増幅器１０の周囲温度を検知
し、その値に応じた温度信号を出力する。出力電力検出
器２２は増幅器１０の出力端子１４における信号の電力
を検出し、その値に応じた出力電力信号を出力する。バ
イアス制御回路２４は増幅器１０のバイアス電圧、例え
ば最終段の大電力ＧａＡｓＦＥＴのドレイン電圧を制御
するものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram schematically showing an embodiment of the present invention. The same components as those in FIG. 5 are designated by the same reference numerals. The temperature detector 20 detects the ambient temperature of the amplifier 10 and outputs a temperature signal according to the value. The output power detector 22 detects the power of the signal at the output terminal 14 of the amplifier 10 and outputs an output power signal according to the value. The bias control circuit 24 controls the bias voltage of the amplifier 10, for example, the drain voltage of the high-power GaAs FET at the final stage.
【００１０】バイアス制御回路２４における制御は、出
力電力信号とその基準値とを比較し、両者が等しくなる
ようにバイアス電圧を増減する制御である。そして電力
の基準値は温度信号の示す周囲温度が低くなれば出力電
力の制御目標値が低くなるように変更される。この様な
制御は、例えば、出力電力信号の電圧と温度信号の電圧
との比が一定値を保つように出力電力目標値を変更する
ことによって実現される。The control in the bias control circuit 24 is a control in which the output power signal is compared with its reference value, and the bias voltage is increased / decreased so that they are equal. Then, the reference value of the electric power is changed so that the control target value of the output electric power becomes lower as the ambient temperature indicated by the temperature signal becomes lower. Such control is realized, for example, by changing the output power target value so that the ratio of the voltage of the output power signal and the voltage of the temperature signal maintains a constant value.
【００１１】図２は温度検出器２０の具体的な構成の一
例を表わす回路図である。サーミスタＲｅｎは温度上昇
とともにその抵抗値が指数関数的に減少する特性を有す
るものであるが、Ｒ1 ，Ｒ2 ，Ｒ3 とで図２に示すよう
な抵抗ネットワークを構成し、定電圧Ｖｃｃを与えてや
れば出力電圧ＶT は温度上昇に対して直線的に上昇する
ようになる。FIG. 2 is a circuit diagram showing an example of a specific structure of the temperature detector 20. The thermistor Ren has a characteristic that its resistance value decreases exponentially as the temperature rises. However, a resistance network as shown in FIG. 2 is formed with R 1 , R 2 and R 3, and a constant voltage Vcc is obtained. If given, the output voltage V T will increase linearly with increasing temperature.
【００１２】図３は出力電力検出器２２の具体的な構成
を表わす図である。ダイオードＤ１は出力の交流信号を
整流するとともに、その非線形な特性に従って、信号の
振幅の２乗に比例した電流を流す。抵抗Ｒ4 はその電流
を電圧に変換するものであり、その結果、出力電圧ＶP
は出力信号の電力に比例した電圧となる。好適な実施例
においては、図２および図３に示した構成の温度検出器
２０および出力電力検出器２２がそれぞれ出力するＶT
およびＶP の比が一定となるように、制御目標電力が設
定され、その値によりバイアス電圧が制御される。しか
しながらこれに限らず、検出された周囲温度に対する制
御目標電力の関係が単調増加関数となるような制御であ
れば、任意に選択することができる。FIG. 3 is a diagram showing a specific configuration of the output power detector 22. The diode D1 rectifies the output AC signal and causes a current proportional to the square of the signal amplitude to flow according to its non-linear characteristic. The resistor R 4 converts the current into a voltage, and as a result, the output voltage V P
Is a voltage proportional to the power of the output signal. In the preferred embodiment, V T output by the temperature detector 20 and the output power detector 22 having the configurations shown in FIGS. 2 and 3, respectively.
The control target power is set so that the ratio of V P and V P becomes constant, and the bias voltage is controlled by the value. However, the control is not limited to this, and any control can be arbitrarily selected as long as the control target power has a monotonically increasing function with respect to the detected ambient temperature.
【００１３】図４は本発明の効果を具体的に示す実測値
のグラフである。破線は常に一定のバイアス電圧を供給
した場合の結果を示す。温度の低下とともに出力電力が
増加し、消費電力はそれ以上に増加している。一方実線
で示したように、本発明による制御を行なえば、出力電
力の変動を小さくし、消費電力を最低レベルに抑えるこ
とができ、効率が最大となる。FIG. 4 is a graph of actually measured values showing the effect of the present invention. The broken line shows the result when a constant bias voltage is always supplied. The output power increases as the temperature decreases, and the power consumption further increases. On the other hand, as shown by the solid line, when the control according to the present invention is performed, the fluctuation of the output power can be reduced, the power consumption can be suppressed to the minimum level, and the efficiency becomes maximum.
【００１４】[0014]
【発明の効果】以上説明したように本発明によれば、周
囲温度が著しく変化する環境においても、出力信号の変
動が少なく、かつ消費電力を大幅に低減することができ
る増幅装置が提供される。As described above, according to the present invention, there is provided an amplifying device capable of reducing the fluctuation of the output signal and drastically reducing the power consumption even in the environment where the ambient temperature changes remarkably. ..
【図１】本発明の一実施例を表わす図である。FIG. 1 is a diagram showing an embodiment of the present invention.
【図２】温度検出器２０の具体的構成の一例を表わす回
路図である。FIG. 2 is a circuit diagram showing an example of a specific configuration of temperature detector 20.
【図３】出力電力検出器２２の具体的構成の一例を表わ
す回路図である。FIG. 3 is a circuit diagram showing an example of a specific configuration of output power detector 22.
【図４】本発明の効果を説明するための図である。FIG. 4 is a diagram for explaining the effect of the present invention.
【図５】従来の増幅装置を表わす図である。FIG. 5 is a diagram showing a conventional amplification device.
１０…増幅器 １４…出力端子 ２０…温度検出器 ２２…出力電力検出器 ２４…バイアス制御回路 10 ... Amplifier 14 ... Output terminal 20 ... Temperature detector 22 ... Output power detector 24 ... Bias control circuit
Claims (3)
する温度信号を出力する温度検出器と、 該増幅器の出力電力を検出して該出力電力に応じて変化
する出力電力信号を出力する出力電力検出器と、 該温度信号および出力電力信号に応じて該増幅器へのバ
イアス電圧を制御するバイアス電圧制御器とを具備する
ことを特徴とする増幅装置。1. An amplifier that amplifies and outputs an input signal, a temperature detector that detects an ambient temperature of the amplifier and outputs a temperature signal that changes according to the ambient temperature, and an output power of the amplifier. And an output power detector that outputs an output power signal that changes according to the output power, and a bias voltage controller that controls a bias voltage to the amplifier according to the temperature signal and the output power signal. An amplification device characterized by.
号が示す周囲温度が下がると前記出力電力信号が示す出
力電力が下がり、周囲温度が上がると出力電力が上がる
ようなバイアス電圧の制御を行なう請求項１記載の増幅
装置。2. The bias voltage controller controls the bias voltage such that the output power indicated by the output power signal decreases when the ambient temperature indicated by the temperature signal decreases and the output power rises when the ambient temperature rises. The amplification device according to claim 1.
記出力電力検出器は前記増幅器の出力信号の電圧の変化
に対して非線形な関係で変化する電流を流すダイオード
と、該ダイオードに流れる電流に比例した電圧を前記出
力電力信号として出力する抵抗器とを含む請求項２記載
の増幅装置。3. The temperature detector includes a thermistor, and the output power detector includes a diode that supplies a current that changes in a non-linear relationship with a change in the voltage of the output signal of the amplifier, and a current that flows in the diode. The amplifier device according to claim 2, further comprising a resistor that outputs a proportional voltage as the output power signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3237950A JPH0575352A (en) | 1991-09-18 | 1991-09-18 | Amplifier device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3237950A JPH0575352A (en) | 1991-09-18 | 1991-09-18 | Amplifier device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0575352A true JPH0575352A (en) | 1993-03-26 |
Family
ID=17022870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3237950A Withdrawn JPH0575352A (en) | 1991-09-18 | 1991-09-18 | Amplifier device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0575352A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009536483A (en) * | 2006-05-05 | 2009-10-08 | アストリウム・リミテッド | High frequency power amplifier |
| US9853608B2 (en) * | 2015-06-19 | 2017-12-26 | Qorvo Us, Inc. | Temperature compensation technique for envelope tracking system |
-
1991
- 1991-09-18 JP JP3237950A patent/JPH0575352A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009536483A (en) * | 2006-05-05 | 2009-10-08 | アストリウム・リミテッド | High frequency power amplifier |
| US8208874B2 (en) | 2006-05-05 | 2012-06-26 | Astrium Limited | RF power amplifiers |
| US9853608B2 (en) * | 2015-06-19 | 2017-12-26 | Qorvo Us, Inc. | Temperature compensation technique for envelope tracking system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6369554B1 (en) | Linear regulator which provides stabilized current flow | |
| US5652547A (en) | Current comparator automatic output control | |
| US5917639A (en) | Optical receiver | |
| US6667660B2 (en) | Temperature sensor and circuit configuration for controlling the gain of an amplifier circuit | |
| US5291073A (en) | Thermal power sensor | |
| US7400197B2 (en) | Gain control circuit capable of reducing change in gain due to variation of ambient temperature | |
| EP1756943A1 (en) | Automatic current reduction biasing technique for rf amplifier | |
| JPH05206771A (en) | Automatic output power control circuit | |
| JPH09121125A (en) | Bias current control circuit for amplifier | |
| JPH0575352A (en) | Amplifier device | |
| CN116436418A (en) | Protection circuit and amplifying circuit | |
| US7102435B2 (en) | Amplifier arrangement and control loop having the amplifier arrangement | |
| JP3403195B2 (en) | In particular, a MESFET power amplifier mounted on a satellite for microwave signal amplification and its power supply unit | |
| JPS60198907A (en) | Transformerless push-pull output circuit | |
| US7834602B2 (en) | Feedback power control system for an electrical component | |
| KR100426150B1 (en) | Power supply for individually controlling discharge current and absorbing current as output current supplied to load | |
| JP2877945B2 (en) | Transmitter with transmission power control function | |
| US20030174011A1 (en) | Method of stabilization of operating conditions in electronic devices | |
| EP0825709A1 (en) | Grounded-emitter amplifier circuit with an attenuator | |
| JPH04252606A (en) | Transmission power amplifier circuit | |
| RU2209407C2 (en) | Temperature-sensitive element built on transistors with current output | |
| JPH05115120A (en) | Power source circuit | |
| KR950002095Y1 (en) | Automatic gaincontrol circuit of optical magnetic drive | |
| JPH0753295Y2 (en) | Antenna amplifier power supply circuit | |
| JPH0537530Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19981203 |