Time base error correction system

Details Time base error correction system Time base error correction system

G - Physics

11

B

352/33.12

G11B 3/00 (2006.01) H04N 9/893 (2006.01)

Patent

CA 1116749

RCA 68,004 TIME BASE ERROR CORRECTION SYSTEM Abstract of the Disclosure Means are provided for detecting departures of the relative velocity between a signal pickup and the information track of a video disc from a predetermined value. Signals recovered when relative motion is established between the track of the disc and the signal pickup are subjected to a delay in a charge transfer delay line. The line delay is made to vary in response to the output of the detecting means so as to compensate for signal time base errors engendered through departures of said relative velocity from the predetermined value. Non-linearities of the time delay of the delay line with respect to the output of the detecting means, which are due to large changes in the output frequency of a voltage controlled oscillator utilized for controlling the operation of the delay line, are compensated for by means of a linearizing feedback loop for the oscillator. - 1 -

311432

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