JPH01160709U - - Google Patents
Info
- Publication number
- JPH01160709U JPH01160709U JP5625388U JP5625388U JPH01160709U JP H01160709 U JPH01160709 U JP H01160709U JP 5625388 U JP5625388 U JP 5625388U JP 5625388 U JP5625388 U JP 5625388U JP H01160709 U JPH01160709 U JP H01160709U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- gaasfet
- gate
- detection
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
- Transmitters (AREA)
Description
第１図は本考案の一実施例における自動電力制
御回路の構成を示す図、第２図は同回路の動作説
明に使用するタイミング図、第３図および第４図
はそれぞれ従来の異なる自動電力制御回路の構成
を示す図である。
２…検出回路、３…演算増幅器、５…ＤＣ―Ｄ
Ｃコンバータ、６…オフセツト回路、６１…電圧
発生回路、１０…電力増幅器、１１…電源回路、
１２…遅延回路。
Fig. 1 is a diagram showing the configuration of an automatic power control circuit according to an embodiment of the present invention, Fig. 2 is a timing diagram used to explain the operation of the circuit, and Figs. 3 and 4 are diagrams showing different conventional automatic power control circuits. FIG. 3 is a diagram showing the configuration of a control circuit. 2...Detection circuit, 3...Operation amplifier, 5...DC-D
C converter, 6...offset circuit, 61...voltage generation circuit, 10...power amplifier, 11...power supply circuit,
12...Delay circuit.
Claims (1)
増幅器の出力電力を前記ＧａＡｓＦＥＴのゲート
電圧を可変することにより制御する自動電力制御
回路において、前記電力増幅器の出力レベルを検
出する検出回路と、この検出回路の検出電圧を基
準電圧と比較する比較回路と、この比較回路の比
較出力に応じて前記ＧａＡｓＦＥＴのゲート制御
電圧を発生する制御電圧発生回路と、前記電力増
幅器の増幅動作の開始に先立ち前記比較回路に所
定のオフセツト電圧を前記検出電圧に重畳して供
給し前記ゲート制御電圧を負電圧に設定するオフ
セツト回路とを具備したことを特徴とする自動電
力制御回路。 An automatic power control circuit that controls the output power of a power amplifier using a GaAsFET as an amplification element by varying the gate voltage of the GaAsFET, comprising: a detection circuit that detects the output level of the power amplifier; and a detection voltage of the detection circuit. a control voltage generation circuit that generates a gate control voltage for the GaAsFET according to the comparison output of the comparison circuit; An automatic power control circuit comprising: an offset circuit that supplies an offset voltage superimposed on the detected voltage and sets the gate control voltage to a negative voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5625388U JPH01160709U (en) | 1988-04-26 | 1988-04-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5625388U JPH01160709U (en) | 1988-04-26 | 1988-04-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01160709U true JPH01160709U (en) | 1989-11-08 |
Family
ID=31282134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5625388U Pending JPH01160709U (en) | 1988-04-26 | 1988-04-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01160709U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04255119A (en) * | 1991-02-07 | 1992-09-10 | Fujitsu Ltd | Transmission power adjustment circuit |
-
1988
- 1988-04-26 JP JP5625388U patent/JPH01160709U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04255119A (en) * | 1991-02-07 | 1992-09-10 | Fujitsu Ltd | Transmission power adjustment circuit |