JPS6144925U - automatic gain control amplifier circuit - Google Patents
automatic gain control amplifier circuitInfo
- Publication number
- JPS6144925U JPS6144925U JP12870384U JP12870384U JPS6144925U JP S6144925 U JPS6144925 U JP S6144925U JP 12870384 U JP12870384 U JP 12870384U JP 12870384 U JP12870384 U JP 12870384U JP S6144925 U JPS6144925 U JP S6144925U
- Authority
- JP
- Japan
- Prior art keywords
- amplifier circuit
- gain control
- thermistors
- automatic gain
- control amplifier
- 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
Landscapes
- Control Of Amplification And Gain Control (AREA)
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図は本考案の利得制御増幅回路の実施例のブロック
構成図。
第２図は従来の自動利得制御増幅回路のブロック構成図
。
第３図は従来の自動利得制御増幅回路の動作説明図。
１・・・・・・利得可変増幅回路、２・・・・・・信号
レベル振幅検出回路、３，４・・・・・・サーミスタ、
５・・・・・・パイパスコンデンサ、６・・・・・・信
号レベル振幅検出回路出力。FIG. 1 is a block diagram of an embodiment of the gain control amplifier circuit of the present invention. FIG. 2 is a block diagram of a conventional automatic gain control amplifier circuit. FIG. 3 is an explanatory diagram of the operation of a conventional automatic gain control amplifier circuit. 1...Variable gain amplifier circuit, 2...Signal level amplitude detection circuit, 3, 4...Thermistor,
5... Bypass capacitor, 6... Signal level amplitude detection circuit output.
Claims (1)
対応して利得が変化する利得可変増幅回路と、 この増幅回路の出力信号レベルを検出して、その出力信
号レベルが一定になるように上記利得制御入力端子に制
御信号を与える信号レベル振幅検出回路と、 を備えた自動利得制御増幅回路において、上記信号レベ
ル振幅検出回路は、 直列接続された２個のサーミスタと、 この２個のサーミスタに直流バイアス電圧を印加する手
段と、 上記２個のサーミスタの一方に並列に接続され上記出力
信号周波数に対して低いインピーダンスを示す値のコン
デンサと を備え、 上記増幅回路の出力信号レベルに比例する電圧が上記２
個の直列接続されたサーミスタに印加され、上記コンデ
ンサの端子電圧に比例する電圧が上記制御信号として利
用されるように接続されたことを特徴とする自動利得制
御増幅回路。[Claims for Utility Model Registration] A variable gain amplifier circuit that includes a gain control input terminal and whose gain changes in accordance with the voltage applied to this terminal; A signal level amplitude detection circuit that applies a control signal to the gain control input terminal so that the level is constant; In an automatic gain control amplifier circuit, the signal level amplitude detection circuit includes two thermistors connected in series. and means for applying a DC bias voltage to the two thermistors, and a capacitor connected in parallel to one of the two thermistors and having a value that exhibits a low impedance with respect to the output signal frequency, the amplifier circuit The voltage proportional to the output signal level of
An automatic gain control amplifier circuit, characterized in that the circuit is connected so that a voltage applied to the thermistors connected in series and proportional to the terminal voltage of the capacitor is used as the control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12870384U JPS6144925U (en) | 1984-08-24 | 1984-08-24 | automatic gain control amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12870384U JPS6144925U (en) | 1984-08-24 | 1984-08-24 | automatic gain control amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6144925U true JPS6144925U (en) | 1986-03-25 |
Family
ID=30687328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12870384U Pending JPS6144925U (en) | 1984-08-24 | 1984-08-24 | automatic gain control amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6144925U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63107282U (en) * | 1986-12-29 | 1988-07-11 | ||
| JPS63126176U (en) * | 1987-02-12 | 1988-08-17 |
-
1984
- 1984-08-24 JP JP12870384U patent/JPS6144925U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63107282U (en) * | 1986-12-29 | 1988-07-11 | ||
| JPS63126176U (en) * | 1987-02-12 | 1988-08-17 |
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