Pickup driving device for disk player

Details Pickup driving device for disk player Pickup driving device for disk player

1990-02-08

1991-04-23

Shoop, Jr., William M.

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

388810, 388910, H02P 500

Patent

active

050105825

ABSTRACT:
A pickup driving device for a disk player is provided, wherein the gain of a negative feedback circuit for driving a slider motor is made variable and the gain is changed correspondingly to the operation mode of a disk player, which made it possible to increase the moving speed of a slider motor in a search mode without sacrificing the stability against external disturbances.

REFERENCES:
patent: 3950683 (1976-04-01), Lamsin
patent: 4007428 (1977-02-01), Brown et al.
patent: 4185248 (1980-01-01), Namura et al.
patent: 4303873 (1981-12-01), Hawkins
patent: 4471276 (1984-09-01), Cudlitz
patent: 4510423 (1985-04-01), Iwasama
patent: 4774474 (1988-09-01), Beauducel et al.

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