JPH02126421U - - Google Patents
Info
- Publication number
- JPH02126421U JPH02126421U JP3492489U JP3492489U JPH02126421U JP H02126421 U JPH02126421 U JP H02126421U JP 3492489 U JP3492489 U JP 3492489U JP 3492489 U JP3492489 U JP 3492489U JP H02126421 U JPH02126421 U JP H02126421U
- Authority
- JP
- Japan
- Prior art keywords
- output
- gain control
- comparator
- circuit
- frequency power
- 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 3
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の利得制御回路の一実施例を示
す図、第２図は高周波電力増幅用ＩＣの制御用入
力端子に加えられる制御用電圧と出力電圧の関係
を示す図、第３図は従来の利得制御回路を示す図
、第４図は従来の他の利得制御回路を示す図であ
る。
１……入力端子、２……高周波電力増幅用ＩＣ
（集積回路）、３……方向性結合器、４……出力
端子、５……ダイオード、６……抵抗、７……抵
抗、８……バリオーム、９……基準電圧、１０…
…オペアンプ、１２……出力端子、１３，１４…
…トランジスタ、１５……利得制御用入力端子、
１６……入力端子、１７……ツエナーダイオード
、１８……検波手段、１９……比較器、２０……
ダーリントン接続回路。
FIG. 1 is a diagram showing an embodiment of the gain control circuit of the present invention, FIG. 2 is a diagram showing the relationship between the control voltage applied to the control input terminal of the high-frequency power amplification IC and the output voltage, and FIG. 4 is a diagram showing a conventional gain control circuit, and FIG. 4 is a diagram showing another conventional gain control circuit. 1...Input terminal, 2...High frequency power amplification IC
(Integrated circuit), 3... Directional coupler, 4... Output terminal, 5... Diode, 6... Resistor, 7... Resistor, 8... Variohm, 9... Reference voltage, 10...
...Operational amplifier, 12... Output terminal, 13, 14...
...Transistor, 15...Gain control input terminal,
16... Input terminal, 17... Zener diode, 18... Detection means, 19... Comparator, 20...
Darlington connection circuit.
Claims (1)
、 前記高周波電力増幅回路の出力の一部を検波す
る検波手段と、 前記検波手段の検波出力と基準電圧とを比較し
てその差電圧を出力する比較器と、 前記比較器の出力を前記利得制御用端子に入力
する手段と、 を備えた利得制御回路において、 前記比較器の出力端にリミツタ回路を接続した
ことを特徴とする利得制御回路。[Claims for Utility Model Registration] A high-frequency power amplifier circuit having a gain control terminal, a detection means for detecting a part of the output of the high-frequency power amplifier circuit, and a comparison between the detected output of the detection means and a reference voltage. a comparator for outputting a differential voltage therebetween; and means for inputting the output of the comparator to the gain control terminal, wherein a limiter circuit is connected to the output terminal of the comparator. Features a gain control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3492489U JPH02126421U (en) | 1989-03-28 | 1989-03-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3492489U JPH02126421U (en) | 1989-03-28 | 1989-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02126421U true JPH02126421U (en) | 1990-10-18 |
Family
ID=31539826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3492489U Pending JPH02126421U (en) | 1989-03-28 | 1989-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02126421U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2016047090A1 (en) * | 2014-09-26 | 2017-06-22 | Ｎｅｃスペーステクノロジー株式会社 | Output power control device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611221A (en) * | 1979-07-10 | 1981-02-04 | Sekisui Plastics Co Ltd | Thermal adhesion of thermoplastic resin member |
| JPS56109012A (en) * | 1980-02-01 | 1981-08-29 | Nec Corp | Automatic gain control circuit |
-
1989
- 1989-03-28 JP JP3492489U patent/JPH02126421U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611221A (en) * | 1979-07-10 | 1981-02-04 | Sekisui Plastics Co Ltd | Thermal adhesion of thermoplastic resin member |
| JPS56109012A (en) * | 1980-02-01 | 1981-08-29 | Nec Corp | Automatic gain control circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2016047090A1 (en) * | 2014-09-26 | 2017-06-22 | Ｎｅｃスペーステクノロジー株式会社 | Output power control device |