JPS59187221U - Automatic gain control circuit in disc playback device - Google Patents
Automatic gain control circuit in disc playback deviceInfo
- Publication number
- JPS59187221U JPS59187221U JP16214082U JP16214082U JPS59187221U JP S59187221 U JPS59187221 U JP S59187221U JP 16214082 U JP16214082 U JP 16214082U JP 16214082 U JP16214082 U JP 16214082U JP S59187221 U JPS59187221 U JP S59187221U
- Authority
- JP
- Japan
- Prior art keywords
- control circuit
- gain control
- voltage
- automatic gain
- playback device
- 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.)
- Granted
Links
Landscapes
- Manipulation Of Pulses (AREA)
- Control Of Amplification And Gain Control (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (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図はディスク情報ピット検出信号の波形整形動作を
示す波形図、第２図はこの考案のＡＧＣ回路１０を組込
んだディスク再生装置を示すブロック図、第３図は第２
図のＡＧＣ回路１０の実施例を示すブロック図、第４図
は第３図の回路の動作の一例を示す波形図である。
１・・・ディスク、２・・・ターンテーブル、３・・・
ディスク回転モータ、５・・・フォーカス制御コイル、
６・・・トラッキング制御コイル、７・・・対物レンズ
、１０・・−ＡＧＣ回路、２０・・・マスククロック発
生回路、２２・・・ディスク回転サーボ回路、４２・・
・表示装置、５０・・・ＶＣＡ、 ５１・・・微分回路
、５２・・・ピーク検出回路。FIG. 1 is a waveform diagram showing the waveform shaping operation of a disc information pit detection signal, FIG. 2 is a block diagram showing a disc playback device incorporating the AGC circuit 10 of this invention, and FIG.
FIG. 4 is a block diagram showing an embodiment of the AGC circuit 10 shown in the figure, and FIG. 4 is a waveform diagram showing an example of the operation of the circuit shown in FIG. 1...disc, 2...turntable, 3...
Disk rotation motor, 5... focus control coil,
6... Tracking control coil, 7... Objective lens, 10...-AGC circuit, 20... Mask clock generation circuit, 22... Disk rotation servo circuit, 42...
-Display device, 50...VCA, 51...differentiation circuit, 52...peak detection circuit.
Claims (1)
に介挿された電圧制御形増幅器と、前記゛ 電圧制御増
幅器の出力信号を微分する微分回路と、前記微分回路の
微分値に応じて前記電圧制御形増幅器のゲインを制御し
、当該電圧制御形増幅器の出力信号の立上り、立下りの
傾斜を一定化する回路とを具えたディス）主装置におけ
る自動利得制御回路。a voltage-controlled amplifier inserted in the signal line of the disk information pit detection signal before waveform shaping; a differentiation circuit for differentiating the output signal of the voltage-controlled amplifier; 1. An automatic gain control circuit in a main device, comprising a circuit for controlling the gain of a voltage-controlled amplifier and for making constant the rising and falling slopes of the output signal of the voltage-controlled amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16214082U JPS59187221U (en) | 1982-10-26 | 1982-10-26 | Automatic gain control circuit in disc playback device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16214082U JPS59187221U (en) | 1982-10-26 | 1982-10-26 | Automatic gain control circuit in disc playback device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59187221U true JPS59187221U (en) | 1984-12-12 |
| JPH021948Y2 JPH021948Y2 (en) | 1990-01-18 |
Family
ID=30356136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16214082U Granted JPS59187221U (en) | 1982-10-26 | 1982-10-26 | Automatic gain control circuit in disc playback device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59187221U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01174123A (en) * | 1987-12-28 | 1989-07-10 | Alpine Electron Inc | Automatic input/output characteristic adjusting method in a/d converter |
-
1982
- 1982-10-26 JP JP16214082U patent/JPS59187221U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01174123A (en) * | 1987-12-28 | 1989-07-10 | Alpine Electron Inc | Automatic input/output characteristic adjusting method in a/d converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH021948Y2 (en) | 1990-01-18 |
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