Bidirectional deflector driver for video disc

Details Bidirectional deflector driver for video disc Bidirectional deflector driver for video disc

G - Physics

11

B

352/21.33

G11B 7/00 (2006.01) G11B 21/02 (2006.01) H03K 4/72 (2006.01) H03K 4/94 (2006.01) H03K 17/00 (2006.01)

Patent

CA 1154160

-13- RCA 74,513 Abstract A bidirectional pulse generator for driving a video disc stylus deflector. Responsive to a deflection pulse a charge integrator has its input connected to a polarity selectable current source. The integrator generates a ramped potential output signal having an amplitude proportional to the deflection pulse width and a slope related to the current polarity. Upon termination of the deflection pulse a feedback loop is closed around the integrator to rapidly reset the output potential of the integrator to one of two pre-pulse output amplitudes. A direction control selects the current source polarity and controls the pre-pulse output amplitude and thereby the relative polarity of the output pulse.

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