Automatic tracking apparatus

Details Automatic tracking apparatus Automatic tracking apparatus

G - Physics

11

B

352/21.33

G11B 5/592 (2006.01) G11B 5/55 (2006.01) G11B 21/10 (2006.01)

Patent

CA 1270947

ABSTRACT An automatic tracking apparatus for use in a video tape recorder including a magnetic head mounted on a piezo-electric element. The automatic tracking apparatus includes a driving pulse generator which generates a driving pulse signal causing the piezo-electric element to drive the magnetic head. The driving pulse signal has a waveform including a jumping portion causing the magnetic head to jump from one recording track to another recording track, which generates ringing vibrations in the piezo-electric element in a change-speed reproduction mode. An inflection point is imposed on the jumping portion of the driving pulse signal waveform. The position of the inflection point is determined in accordance with the amplitude level of the ringing vibrations so as to minimize the amplitude level of the ringing vibrations.

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