JPS59194113U - Automatic gain control circuit for tape recorder - Google Patents
Automatic gain control circuit for tape recorderInfo
- Publication number
- JPS59194113U JPS59194113U JP8737183U JP8737183U JPS59194113U JP S59194113 U JPS59194113 U JP S59194113U JP 8737183 U JP8737183 U JP 8737183U JP 8737183 U JP8737183 U JP 8737183U JP S59194113 U JPS59194113 U JP S59194113U
- Authority
- JP
- Japan
- Prior art keywords
- tape recorder
- control circuit
- gain control
- automatic gain
- preamplifier
- 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
- Signal Processing Not Specific To The Method Of Recording And Reproducing (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図は従来の自動利得制御回路を示す回路図、第２図
は本考案の一実施例を示す回路図、第３図はＡＧＣアン
プの出力変化の従来と本考案の場合を示すグラフ。第４
図はプリアンプの入力信号を示す波形図、第５図はプリ
アンプの出力の従来例を示す波形図、第６図は本考案に
おけるプリアンプの出力を示す波形図である。
１・・・プリアンプＩＣ，５・・・プリアンプ、６・・
・バッファアンプ、７・・・ＡＧＣアンプ、ＳＷ４・・
・スイッチ、十Ｂ・・・電源、Ｒ１，Ｒ２，Ｒ３・・・
抵抗、ＤＩ。
Ｄ２・・・ダイオード、Ｃ１・・・コンデンサ。FIG. 1 is a circuit diagram showing a conventional automatic gain control circuit, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is a graph showing changes in the output of an AGC amplifier in the conventional case and the present invention. Fourth
5 is a waveform diagram showing the input signal of the preamplifier, FIG. 5 is a waveform diagram showing a conventional example of the output of the preamplifier, and FIG. 6 is a waveform diagram showing the output of the preamplifier according to the present invention. 1... Preamplifier IC, 5... Preamplifier, 6...
・Buffer amplifier, 7...AGC amplifier, SW4...
・Switch, 10B...Power supply, R1, R2, R3...
Resistance, D.I. D2...diode, C1...capacitor.
Claims (1)
応じてこのプリアンプの利得を制御するための信号を出
力する増幅器を備えたテープレコーダの自動利得制御回
路において、テープレコーダの再生時に上記増幅器の入
力端子に上記プリアンプの利得が変化しないレベルの所
定電圧を印加する手段を備えたことを特徴とするテープ
レコーダの自動利得制御回路。In an automatic gain control circuit for a tape recorder equipped with an amplifier that outputs a signal for controlling the gain of the preamplifier according to the output of the preamplifier for recording and playback of the tape recorder, the input terminal of the amplifier is connected during playback of the tape recorder. An automatic gain control circuit for a tape recorder, comprising means for applying a predetermined voltage at a level that does not change the gain of the preamplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8737183U JPS59194113U (en) | 1983-06-08 | 1983-06-08 | Automatic gain control circuit for tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8737183U JPS59194113U (en) | 1983-06-08 | 1983-06-08 | Automatic gain control circuit for tape recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59194113U true JPS59194113U (en) | 1984-12-24 |
Family
ID=30217285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8737183U Pending JPS59194113U (en) | 1983-06-08 | 1983-06-08 | Automatic gain control circuit for tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59194113U (en) |
-
1983
- 1983-06-08 JP JP8737183U patent/JPS59194113U/en active Pending
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