JPS5873620U - variable gain amplifier - Google Patents
variable gain amplifierInfo
- Publication number
- JPS5873620U JPS5873620U JP16712881U JP16712881U JPS5873620U JP S5873620 U JPS5873620 U JP S5873620U JP 16712881 U JP16712881 U JP 16712881U JP 16712881 U JP16712881 U JP 16712881U JP S5873620 U JPS5873620 U JP S5873620U
- Authority
- JP
- Japan
- Prior art keywords
- variable gain
- gain amplifier
- amplifier
- switching means
- drain bias
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案の一実施例を示す回路図、第２図−は本
考案の実施例における入出力特性を示すグラフ、第３図
は本考案の他の実施例を示す回路図である。
１・・・・・・電界効果トランジスタ（ＦＥＴ）、２・
・・・・・ゲートバイアス端子、３・・・・・・ゲート
バイアス回路、４・・・・・・ドレインバイアス端子、
５・・・・・・切換回路、６・・・・・・抵抗回路、６
ａ・・・・・・所定バイアス抵抗、７・・・・・・ドレ
インバイアス回路、８・・・・・・入力端子、９゜１０
・・・・・・コンデンサ、１１・・・・・・出力端子。Fig. 1 is a circuit diagram showing one embodiment of the present invention, Fig. 2 is a graph showing input/output characteristics in the embodiment of the present invention, and Fig. 3 is a circuit diagram showing another embodiment of the present invention. . 1... Field effect transistor (FET), 2.
...Gate bias terminal, 3...Gate bias circuit, 4...Drain bias terminal,
5...Switching circuit, 6...Resistance circuit, 6
a...Predetermined bias resistance, 7...Drain bias circuit, 8...Input terminal, 9°10
...Capacitor, 11...Output terminal.
Claims (2)
切換え手段を設け、該切換え手段により設定されたドレ
インバイアス電圧に対応して該増幅器の動作電圧を変化
させ、利得を可変するよ、 うにしたことを特徴と
する利得可変型増幅器。(1) A switching means is provided for switching the priority use of the drain bias of the FET amplifier, and the operating voltage of the amplifier is varied in accordance with the drain bias voltage set by the switching means, thereby varying the gain. Variable gain amplifier.
器のいずれかを選択してドレインバイアス電圧源間に接
続する切換器とからなる実用新案登録請求の範囲第（１
）項記載の利得可変型増幅器。(2) The switching means comprises a plurality of resistors and a switch that selects one of the resistors and connects it between the drain bias voltage sources.
) The variable gain amplifier described in section 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16712881U JPS5873620U (en) | 1981-11-11 | 1981-11-11 | variable gain amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16712881U JPS5873620U (en) | 1981-11-11 | 1981-11-11 | variable gain amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5873620U true JPS5873620U (en) | 1983-05-18 |
Family
ID=29959239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16712881U Pending JPS5873620U (en) | 1981-11-11 | 1981-11-11 | variable gain amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5873620U (en) |
-
1981
- 1981-11-11 JP JP16712881U patent/JPS5873620U/en active Pending
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