Capstan drive system for high speed tape duplicator

Details Capstan drive system for high speed tape duplicator Capstan drive system for high speed tape duplicator

G - Physics

11

B

352/31.2, 352/10

G11B 5/86 (2006.01) G11B 27/00 (2006.01)

Patent

CA 1211554

CAPSTAN DRIVE SYSTEM FOR HIGH SPEED TAPE DUPLICATOR ABSTRACT OF THE DISCLOSURE Apparatus and method for controlling the speed of a tape drive having an ingoing capstan and an outgoing cap- stan with a magnetic head therebetween. First and second phase lock loop servo-circuits for driving first and second dc motors which drive the ingoing and outgoing capstans, respectively. A stable reference oscillator providing the reference frequency to one of the phase lock loop servo-cir- cuits and to another phase lock loop circuit which provides the reference frequency to the other phase lock loop servo- circuit. The feedback frequency in the third phase lock loop circuit is adjustable to control the difference in the two reference frequencies to the two servo-circuits for the purpose of controlling the difference in speeds or the in- going and outgoing capstans.

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