JPS57120266A - Reproducing device for information recording medium - Google Patents

Reproducing device for information recording medium

Info

Publication number
JPS57120266A
JPS57120266A JP56004419A JP441981A JPS57120266A JP S57120266 A JPS57120266 A JP S57120266A JP 56004419 A JP56004419 A JP 56004419A JP 441981 A JP441981 A JP 441981A JP S57120266 A JPS57120266 A JP S57120266A
Authority
JP
Japan
Prior art keywords
signal
frequency
microcomputer
supplied
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.)
Pending
Application number
JP56004419A
Other languages
Japanese (ja)
Inventor
Hiroyuki Sugiyama
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP56004419A priority Critical patent/JPS57120266A/en
Publication of JPS57120266A publication Critical patent/JPS57120266A/en
Pending legal-status Critical Current

Links

Landscapes

  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE: To reduce cost by simplifying a circuit constitution, by enabling the output signal which generates a reference signal for a motorservo circuit to be used as an operation clock signal for a microcomputer.
CONSTITUTION: An output oscillation frequency signal from a quartz oscillator 13 is supplied to a 1/256 frequency divider 14 to have a frequency equal to the horizontal scanning frequency of a color video signal. This signal is further frequency-divided by a programmable frequency divider 15 to be supplied as a reference signal to a phase comparator 17, where it is phase-compared with a rotation detection signal from a rotation detector 10 and applied to a motor 9, whose rotational frequency is controlled. Thus, the output oscillation frequency signal of the quartz oscillator 13 is used as a reference signal for a constant- speed servo circuit for the motor 9, but supplied as a clock signal to a key-input fetching microcomputer 11 and a microcomputer 12 for equipment operation control, thereby operating them.
COPYRIGHT: (C)1982,JPO&Japio
JP56004419A 1981-01-14 1981-01-14 Reproducing device for information recording medium Pending JPS57120266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56004419A JPS57120266A (en) 1981-01-14 1981-01-14 Reproducing device for information recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56004419A JPS57120266A (en) 1981-01-14 1981-01-14 Reproducing device for information recording medium

Publications (1)

Publication Number Publication Date
JPS57120266A true JPS57120266A (en) 1982-07-27

Family

ID=11583755

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56004419A Pending JPS57120266A (en) 1981-01-14 1981-01-14 Reproducing device for information recording medium

Country Status (1)

Country Link
JP (1) JPS57120266A (en)

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