JPH0394623U - - Google Patents

Info

Publication number
JPH0394623U
JPH0394623U JP15310489U JP15310489U JPH0394623U JP H0394623 U JPH0394623 U JP H0394623U JP 15310489 U JP15310489 U JP 15310489U JP 15310489 U JP15310489 U JP 15310489U JP H0394623 U JPH0394623 U JP H0394623U
Authority
JP
Japan
Prior art keywords
inverting buffer
offset voltage
circuit
output
integrating circuit
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
JP15310489U
Other languages
English (en)
Other versions
JP2508615Y2 (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 JP15310489U priority Critical patent/JP2508615Y2/ja
Publication of JPH0394623U publication Critical patent/JPH0394623U/ja
Application granted granted Critical
Publication of JP2508615Y2 publication Critical patent/JP2508615Y2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

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

Description

【図面の簡単な説明】
第１図及び第２図は本考案の一実施例を示し、
第１図はオフセツト電圧注入回路の回路図、第２
図は該回路によるオフセツト電圧の変化を示すグ
ラフであり、第３図乃至第５図は従来例を示し、
第３図は光ピツクアツプの固体差によるフオーカ
スエラー曲線の変化を示すグラフ、第４図はオフ
セツト電圧注入回路の回路図、第５図はフオーカ
スエラー曲線の振幅差によるフオーカスエラーを
説明するグラフである。 ２…可変抵抗器、４…フオーカスサーボループ
、５…オフセツト電圧注入回路、６…積分回路、
１０…非反転バツフア、１１…反転バツフア。

Claims (1)

    【実用新案登録請求の範囲】
  1. 積分回路と、前記積分回路に接続した非反転バ
    ツフアと、前記非反転バツフアの出力を反転する
    反転バツフアとからなり、前記積分回路にフオー
    カス検出信号の和を入力し、前記非反転バツフア
    と反転バツフアとの出力端子間電圧を可変抵抗器
    を介して所定のオフセツト電圧とし、サーボルー
    プに注入するフオーカスサーボ機構のオフセツト
    電圧注入回路。
JP15310489U 1989-12-28 1989-12-28 フオ―カスサ―ボ機構のオフセツト電圧注入回路 Expired - Fee Related JP2508615Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15310489U JP2508615Y2 (ja) 1989-12-28 1989-12-28 フオ―カスサ―ボ機構のオフセツト電圧注入回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15310489U JP2508615Y2 (ja) 1989-12-28 1989-12-28 フオ―カスサ―ボ機構のオフセツト電圧注入回路

Publications (2)

Publication Number Publication Date
JPH0394623U true JPH0394623U (ja) 1991-09-26
JP2508615Y2 JP2508615Y2 (ja) 1996-08-28

Family

ID=31699331

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15310489U Expired - Fee Related JP2508615Y2 (ja) 1989-12-28 1989-12-28 フオ―カスサ―ボ機構のオフセツト電圧注入回路

Country Status (1)

Country Link
JP (1) JP2508615Y2 (ja)

Also Published As

Publication number Publication date
JP2508615Y2 (ja) 1996-08-28

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees