JPS6423423A - Optical disk reproducing device - Google Patents

Optical disk reproducing device

Info

Publication number
JPS6423423A
JPS6423423A JP17944987A JP17944987A JPS6423423A JP S6423423 A JPS6423423 A JP S6423423A JP 17944987 A JP17944987 A JP 17944987A JP 17944987 A JP17944987 A JP 17944987A JP S6423423 A JPS6423423 A JP S6423423A
Authority
JP
Japan
Prior art keywords
signal
circuit
gain
data field
recorded data
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
JP17944987A
Other languages
Japanese (ja)
Other versions
JP2516990B2 (en
Inventor
Takashi Inoue
Kunihiko Mototani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62179449A priority Critical patent/JP2516990B2/en
Publication of JPS6423423A publication Critical patent/JPS6423423A/en
Application granted granted Critical
Publication of JP2516990B2 publication Critical patent/JP2516990B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To correctly attain the reproduction of a data without waveform distortion by operating a gain variable amplifier circuit at a fixed gain except a recorded data field. CONSTITUTION:A signal ready by an optical head 2 from a disk 1 is binarized by a comparator 5 via a preamplifier 3 and a gain variable amplifier circuit 8 and demodulated by a demodulator 6. On the other hand, a binarization signal from the comparator 5 is given to an address reproducing circuit 10, from which a read signal of address information in a sector identifier is outputted. Based on the signal, a signal specifying a recorded data field is outputted from a data period generating section 11. This signal and a detection signal for the amplitude from an amplitude detection circuit 9 are given to an amplifier circuit 8 via an AND circuit 12 and the gain of the circuit 8 is made variable at the recorded data field only and is made fixed in other areas.
JP62179449A 1987-07-17 1987-07-17 Optical disc player Expired - Fee Related JP2516990B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62179449A JP2516990B2 (en) 1987-07-17 1987-07-17 Optical disc player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62179449A JP2516990B2 (en) 1987-07-17 1987-07-17 Optical disc player

Publications (2)

Publication Number Publication Date
JPS6423423A true JPS6423423A (en) 1989-01-26
JP2516990B2 JP2516990B2 (en) 1996-07-24

Family

ID=16066051

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62179449A Expired - Fee Related JP2516990B2 (en) 1987-07-17 1987-07-17 Optical disc player

Country Status (1)

Country Link
JP (1) JP2516990B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03102640A (en) * 1989-09-14 1991-04-30 Sharp Corp Automatic gain controller for optical memory device
US5117719A (en) * 1990-03-28 1992-06-02 Brother Kogyo Kabushiki Kaisha End trimming mechanism of tape printer
US5163349A (en) * 1990-04-04 1992-11-17 Brother Kogyo Kabushiki Kaisha Tape cutting apparatus
US5174670A (en) * 1990-03-29 1992-12-29 Brother Kogyo Kabushiki Kaisha Tape printer with end trimming cutter
US5224786A (en) * 1990-03-29 1993-07-06 Brother Kogyo Kabushiki Kaisha Tape printer with end trimming cutter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03102640A (en) * 1989-09-14 1991-04-30 Sharp Corp Automatic gain controller for optical memory device
US5117719A (en) * 1990-03-28 1992-06-02 Brother Kogyo Kabushiki Kaisha End trimming mechanism of tape printer
US5174670A (en) * 1990-03-29 1992-12-29 Brother Kogyo Kabushiki Kaisha Tape printer with end trimming cutter
US5224786A (en) * 1990-03-29 1993-07-06 Brother Kogyo Kabushiki Kaisha Tape printer with end trimming cutter
US5163349A (en) * 1990-04-04 1992-11-17 Brother Kogyo Kabushiki Kaisha Tape cutting apparatus

Also Published As

Publication number Publication date
JP2516990B2 (en) 1996-07-24

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Legal Events

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