JPH0376220U - - Google Patents

Info

Publication number
JPH0376220U
JPH0376220U JP13685589U JP13685589U JPH0376220U JP H0376220 U JPH0376220 U JP H0376220U JP 13685589 U JP13685589 U JP 13685589U JP 13685589 U JP13685589 U JP 13685589U JP H0376220 U JPH0376220 U JP H0376220U
Authority
JP
Japan
Prior art keywords
circuit
limiter
noise reduction
limiter circuit
optical pickup
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
Application number
JP13685589U
Other languages
Japanese (ja)
Other versions
JP2503768Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1989136855U priority Critical patent/JP2503768Y2/en
Publication of JPH0376220U publication Critical patent/JPH0376220U/ja
Application granted granted Critical
Publication of JP2503768Y2 publication Critical patent/JP2503768Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Optical Recording Or Reproduction (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図乃至第５図はこの考案に係るノイズ低減
回路の実施例を示し、第１図はこの考案のブロツ
ク図、第２図はハードリミツタ回路の回路図、第
３図はソフトリミツタ回路の回路図、第４図はス
パイクノイズの波形図、第５図はノイズ低減され
たスパイクノイズの波形図である。 主な符号の説明、１……光学ピツクアツプ出力
の入力信号端子、２……エラー信号を検出する差
動アンプ、３……ゲイン調整器、４……サーボア
ンプ、５……リミツタ回路、６……バツフア回路
、７……アクチユエータコイル。 Figures 1 to 5 show examples of the noise reduction circuit according to this invention. Figure 1 is a block diagram of this invention, Figure 2 is a circuit diagram of a hard limiter circuit, and Figure 3 is a circuit diagram of a soft limiter circuit. , FIG. 4 is a waveform diagram of spike noise, and FIG. 5 is a waveform diagram of noise-reduced spike noise. Explanation of main symbols: 1...Input signal terminal for optical pickup output, 2...Differential amplifier for detecting error signals, 3...Gain adjuster, 4...Servo amplifier, 5...Limiter circuit, 6... ... Buffer circuit, 7... Actuator coil.

Claims (1)

【実用新案登録請求の範囲】 １ フオーカス及びトラツキングサーボ系により
駆動する光学ピツクアツプと、この光学ピツクア
ツプで光学デイスクの情報を読み取つて信号処理
をする光学式記録再生システムにおいて、 少なくともフオーカスサーボ系ループにリミツ
タ回路を設け、光学ピツクアツプからのノイズを
低減するように構成したことを特徴とするノイズ
低減回路。 ２ 上記リミツタ回路にダイオードで構成したハ
ードリミツタ回路を設けたことを特徴とする請求
項１記載のノイズ低減回路。 ３ 上記リミツタ回路にリミツタとフイルタで構
成したソフトリミツタ回路を設けたことを特徴と
する請求項１記載のノイズ低減回路。[Claims for Utility Model Registration] 1. In an optical pickup driven by a focus and tracking servo system, and an optical recording and reproducing system in which the optical pickup reads information on an optical disk and processes signals, at least the focus servo system loop 1. A noise reduction circuit characterized in that a limiter circuit is provided in the circuit to reduce noise from an optical pickup. 2. The noise reduction circuit according to claim 1, wherein the limiter circuit is provided with a hard limiter circuit constituted by a diode. 3. The noise reduction circuit according to claim 1, wherein the limiter circuit is provided with a soft limiter circuit composed of a limiter and a filter.
JP1989136855U 1989-11-28 1989-11-28 Noise reduction circuit Expired - Lifetime JP2503768Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989136855U JP2503768Y2 (en) 1989-11-28 1989-11-28 Noise reduction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989136855U JP2503768Y2 (en) 1989-11-28 1989-11-28 Noise reduction circuit

Publications (2)

Publication Number Publication Date
JPH0376220U true JPH0376220U (en) 1991-07-31
JP2503768Y2 JP2503768Y2 (en) 1996-07-03

Family

ID=31684041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989136855U Expired - Lifetime JP2503768Y2 (en) 1989-11-28 1989-11-28 Noise reduction circuit

Country Status (1)

Country Link
JP (1) JP2503768Y2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59223977A (en) * 1983-06-01 1984-12-15 Mitsubishi Electric Corp Reproducing device of information recorded disk
JPS6074220U (en) * 1983-10-24 1985-05-24 萬世工業株式会社 Control device for optical information reproducing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59223977A (en) * 1983-06-01 1984-12-15 Mitsubishi Electric Corp Reproducing device of information recorded disk
JPS6074220U (en) * 1983-10-24 1985-05-24 萬世工業株式会社 Control device for optical information reproducing device

Also Published As

Publication number Publication date
JP2503768Y2 (en) 1996-07-03

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