JPH02149114U - - Google Patents

Info

Publication number
JPH02149114U
JPH02149114U JP5703489U JP5703489U JPH02149114U JP H02149114 U JPH02149114 U JP H02149114U JP 5703489 U JP5703489 U JP 5703489U JP 5703489 U JP5703489 U JP 5703489U JP H02149114 U JPH02149114 U JP H02149114U
Authority
JP
Japan
Prior art keywords
circuit
low
tracking servo
servo loop
frequency
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
JP5703489U
Other languages
Japanese (ja)
Other versions
JPH0725856Y2 (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 JP1989057034U priority Critical patent/JPH0725856Y2/en
Publication of JPH02149114U publication Critical patent/JPH02149114U/ja
Application granted granted Critical
Publication of JPH0725856Y2 publication Critical patent/JPH0725856Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Description

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

第１図はこの考案に係るＣＤプレーヤの低域発
振防止回路の実施例を示すブロツク図、第２図ａ
及びｂはトラツキング補正信号の特性図、第３図
は従来例のブロツク図である。 主な符号の説明、１：光学ピツクアツプ、２：
ＲＦアンプ、３，１１：サーボプロセツサ、４，
１０：低域遅れ補償回路、５：デジタル信号処理
回路、６：アクチユエータドライバ、７：トラツ
キングアクチユエータ、８：デイスク、９：マイ
クロコンピユータ。 Fig. 1 is a block diagram showing an embodiment of the low-frequency oscillation prevention circuit for a CD player according to this invention, and Fig. 2a
and b are characteristic diagrams of the tracking correction signal, and FIG. 3 is a block diagram of a conventional example. Explanation of main symbols, 1: Optical pickup, 2:
RF amplifier, 3, 11: Servo processor, 4,
10: Low frequency delay compensation circuit, 5: Digital signal processing circuit, 6: Actuator driver, 7: Tracking actuator, 8: Disk, 9: Microcomputer.

Claims (1)

【実用新案登録請求の範囲】 ＣＤプレーヤの光学ピツクアツプを駆動制御す
るトラツキングサーボループ回路において、 トラツキングサーボループ回路内の低域遅れ補
償回路をＯＮ／ＯＦＦする切替え器と、この切替
え器を低域発振が起きたとき制御するデジタル信
号処理回路とで構成したことを特徴とするＣＤプ
レーヤの低域発振防止回路。[Scope of Claim for Utility Model Registration] In a tracking servo loop circuit that drives and controls the optical pickup of a CD player, a switch for turning on/off a low-frequency delay compensation circuit in the tracking servo loop circuit, and a switch for turning on/off a low-frequency delay compensation circuit in the tracking servo loop circuit; 1. A low-frequency oscillation prevention circuit for a CD player, comprising a digital signal processing circuit that performs control when low-frequency oscillation occurs.
JP1989057034U 1989-05-19 1989-05-19 CD player low frequency oscillation prevention circuit Expired - Lifetime JPH0725856Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989057034U JPH0725856Y2 (en) 1989-05-19 1989-05-19 CD player low frequency oscillation prevention circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989057034U JPH0725856Y2 (en) 1989-05-19 1989-05-19 CD player low frequency oscillation prevention circuit

Publications (2)

Publication Number Publication Date
JPH02149114U true JPH02149114U (en) 1990-12-19
JPH0725856Y2 JPH0725856Y2 (en) 1995-06-07

Family

ID=31581383

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989057034U Expired - Lifetime JPH0725856Y2 (en) 1989-05-19 1989-05-19 CD player low frequency oscillation prevention circuit

Country Status (1)

Country Link
JP (1) JPH0725856Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08293122A (en) * 1996-05-16 1996-11-05 Kenwood Corp Low band oscillation preventive circuit of cd player

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5139011A (en) * 1974-09-27 1976-04-01 Nippon Electric Co JIKI HETSUDOICHIGIMESOCHI
JPS55115102A (en) * 1979-02-23 1980-09-04 Matsushita Electric Ind Co Ltd Control unit
JPS5979475A (en) * 1982-10-29 1984-05-08 Toshiba Corp Protecting device of magnetic head for magnetic disk device
JPS6074129A (en) * 1983-09-30 1985-04-26 Sony Corp Tracking servo-circuit of optical disk
JPS60148605U (en) * 1984-03-13 1985-10-02 パイオニア株式会社 disc playback device
JPS6139274A (en) * 1984-07-27 1986-02-25 Toshiba Corp Pickup servo circuit of disc reproducing device
JPS6186820U (en) * 1984-11-13 1986-06-06
JPS6231034A (en) * 1985-08-01 1987-02-10 Sony Corp Tracking servo device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5139011A (en) * 1974-09-27 1976-04-01 Nippon Electric Co JIKI HETSUDOICHIGIMESOCHI
JPS55115102A (en) * 1979-02-23 1980-09-04 Matsushita Electric Ind Co Ltd Control unit
JPS5979475A (en) * 1982-10-29 1984-05-08 Toshiba Corp Protecting device of magnetic head for magnetic disk device
JPS6074129A (en) * 1983-09-30 1985-04-26 Sony Corp Tracking servo-circuit of optical disk
JPS60148605U (en) * 1984-03-13 1985-10-02 パイオニア株式会社 disc playback device
JPS6139274A (en) * 1984-07-27 1986-02-25 Toshiba Corp Pickup servo circuit of disc reproducing device
JPS6186820U (en) * 1984-11-13 1986-06-06
JPS6231034A (en) * 1985-08-01 1987-02-10 Sony Corp Tracking servo device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08293122A (en) * 1996-05-16 1996-11-05 Kenwood Corp Low band oscillation preventive circuit of cd player

Also Published As

Publication number Publication date
JPH0725856Y2 (en) 1995-06-07

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term