JPH03130617U - - Google Patents
Info
- Publication number
- JPH03130617U JPH03130617U JP3653090U JP3653090U JPH03130617U JP H03130617 U JPH03130617 U JP H03130617U JP 3653090 U JP3653090 U JP 3653090U JP 3653090 U JP3653090 U JP 3653090U JP H03130617 U JPH03130617 U JP H03130617U
- Authority
- JP
- Japan
- Prior art keywords
- operational amplifier
- output
- detects
- detection circuit
- input terminal
- 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 2
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Amplifiers (AREA)
Description
第１図は本考案に係る自動出力制御回路の一実
施例を示す回路図、第２図は従来の自動出力制御
回路を示す回路図である。
１……入力端子、３……出力端子、Ｒ１０〜Ｒ
１９……抵抗、Ｃ６〜Ｃ１１……コンデンサ、Ｄ
３，Ｄ４……ダイオード、Ｑ５……オペアンプ、
Ｑ６〜Ｑ８……トランジスタ。
FIG. 1 is a circuit diagram showing an embodiment of an automatic output control circuit according to the present invention, and FIG. 2 is a circuit diagram showing a conventional automatic output control circuit. 1...Input terminal, 3...Output terminal, R10~R
19...Resistor, C6-C11...Capacitor, D
3, D4...diode, Q5... operational amplifier,
Q6-Q8...transistor.
Claims (1)
と、 前記入力信号が入力される入力端子と前記オペ
アンプの逆相入力端との間に直列接続され前記オ
ペアンプの利得を決定する第１及び第２の抵抗と
、 前記オペアンプの出力を検波する検波回路と、 前記第１及び第２の抵抗同士の接続点と基準電
位点との間に接続され、前記検波回路の検波レベ
ルが所定値以上になることにより動作して、前記
検波レベルの上昇に伴つて抵抗値が低下するボリ
ユーム回路とを具備したことを特徴とする自動出
力制御回路。[Claims for Utility Model Registration] An operational amplifier for amplifying and outputting an input signal; and an operational amplifier connected in series between an input terminal to which the input signal is input and a negative-phase input terminal of the operational amplifier to adjust the gain of the operational amplifier. a detection circuit that detects the output of the operational amplifier; and a detection circuit that is connected between a connection point between the first and second resistors and a reference potential point, and that detects the output of the operational amplifier. An automatic output control circuit comprising: a volume circuit that is activated when a level exceeds a predetermined value, and whose resistance value decreases as the detected level increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3653090U JPH03130617U (en) | 1990-04-06 | 1990-04-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3653090U JPH03130617U (en) | 1990-04-06 | 1990-04-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03130617U true JPH03130617U (en) | 1991-12-27 |
Family
ID=31542840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3653090U Pending JPH03130617U (en) | 1990-04-06 | 1990-04-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03130617U (en) |
-
1990
- 1990-04-06 JP JP3653090U patent/JPH03130617U/ja active Pending
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