JPH0320030U - - Google Patents

Info

Publication number
JPH0320030U
JPH0320030U JP7699489U JP7699489U JPH0320030U JP H0320030 U JPH0320030 U JP H0320030U JP 7699489 U JP7699489 U JP 7699489U JP 7699489 U JP7699489 U JP 7699489U JP H0320030 U JPH0320030 U JP H0320030U
Authority
JP
Japan
Prior art keywords
tracking servo
servo circuit
inverting
output
peak hold
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
Application number
JP7699489U
Other languages
Japanese (ja)
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 JP7699489U priority Critical patent/JPH0320030U/ja
Publication of JPH0320030U publication Critical patent/JPH0320030U/ja
Pending legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)

Description

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

第１図はこの考案の一実施例の構成を示す回路
図。第２図はこの考案の一実施例の作用の説明に
供するタイミング図。第３図は従来例の構成を示
す回路図。 Ａ１……差動増幅器、Ａ２……位相補償増幅器
、Ａ３……定電流増幅器、ＶＲ１……可変抵抗器
、Ｔ……トラツキングアクチユエータ、Ａ４……
加算器、Ｑ１およびＱ２……トランジスタ、Ｐ…
…ピークホールド回路。 FIG. 1 is a circuit diagram showing the configuration of an embodiment of this invention. FIG. 2 is a timing diagram for explaining the operation of one embodiment of this invention. FIG. 3 is a circuit diagram showing the configuration of a conventional example. A 1 ... Differential amplifier, A 2 ... Phase compensation amplifier, A 3 ... Constant current amplifier, VR 1 ... Variable resistor, T ... Tracking actuator, A 4 ...
Adder, Q 1 and Q 2 ...transistor, P...
...Peak hold circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 光デイスクプレーヤのトラツキングサーボ回路
において、ピツクアツプのメインスポツト用検出
器からの４出力を加算した加算出力を反転する反
転手段と、反転手段からの出力をピークホールド
するピークホールド手段と、ピークホールド手段
の出力が所定閾値を超えたときトラツクングサー
ボ回路のゲインを低下させるゲイン変更手段とを
備えたことを特徴とするトラツキングサーボ回路
。 In a tracking servo circuit of an optical disc player, an inverting means for inverting a summed output obtained by adding four outputs from a main spot detector of a pickup, a peak hold means for peak-holding the output from the inverting means, and a peak hold means. A tracking servo circuit comprising: gain changing means for reducing the gain of the tracking servo circuit when the output of the tracking servo circuit exceeds a predetermined threshold.
JP7699489U 1989-07-01 1989-07-01 Pending JPH0320030U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7699489U JPH0320030U (en) 1989-07-01 1989-07-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7699489U JPH0320030U (en) 1989-07-01 1989-07-01

Publications (1)

Publication Number Publication Date
JPH0320030U true JPH0320030U (en) 1991-02-27

Family

ID=31618962

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7699489U Pending JPH0320030U (en) 1989-07-01 1989-07-01

Country Status (1)

Country Link
JP (1) JPH0320030U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6120230A (en) * 1984-07-06 1986-01-29 Toshiba Corp Optical disk reproducing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6120230A (en) * 1984-07-06 1986-01-29 Toshiba Corp Optical disk reproducing device

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