ROTATION CONTROLLER OF INFORMATION RECORDING MEDIUM DISC

Title:

ROTATION CONTROLLER OF INFORMATION RECORDING MEDIUM DISC

Document Type and Number:

Japanese Patent JPS5971168

Kind Code:

A

Abstract:

PURPOSE: To attain stable pull in of the 2nd control loop performing control operation, by providing a control loop performing the phase comparison between a signal from a means generating a signal equal to a prescribed number of revolutions of a disc and a rotating signal generated from a frequency generator.

CONSTITUTION: The 1st control loop consists of a loop comprising a motor M →frequency generator FG → 2nd phase comparator PCOM2 → signal operating circuit → phase compensating circuit PC → motor drive circuit MDA → motor M. The 1st control loop performs control operation so that the 2nd error signal as the result of the phase comparison at the 2nd phase comparator PCOM2 between the 2nd reference signal in frequency (fr) generated at the generating means DIV of the 2nd reference signal and a signal generated from a frequency generator FG is zero.

Inventors:

KOTAKE EIICHI
ENAMI TAKESHI
WADA KINZOU

Application Number:

JP18104682A

Publication Date:

April 21, 1984

Filing Date:

October 15, 1982

Export Citation:

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Assignee:

VICTOR COMPANY OF JAPAN

International Classes:

G11B19/20; G11B19/28; (IPC1-7): G11B19/28

Domestic Patent References:

JPS5694548A	1981-07-31
JPS5694547A	1981-07-31
JPS5787371A	1982-05-31

Attorney, Agent or Firm:

Takama Imama

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