Pulse driven control circuit for moving a transducer across a ro

Details Pulse driven control circuit for moving a transducer across a ro Pulse driven control circuit for moving a transducer across a ro

1981-03-23

1984-09-04

Cardillo, Jr., Raymond F.

Facsimile and static presentation processing

Facsimile

Recording apparatus

360 101, 360 102, 369 43, H04N 576, G11B 2112

Patent

active

044700784

ABSTRACT:
A control circuit causes a reproducing transducer feeding motor to move the transducer radially across a disc having a video signal recorded thereon. The video signal is recorded along a spiral track, together with first, second, and third reference signals which control the transducer tracking. A feed pulse forming circuit forms a number of feed pulses according to the number of switching pulses which are generated due to the reproduction of the third reference signal. A number of kick pulses are required for shifting the reproducing transducer element from one track turn to another track turn as it moves toward a center of the rotary recording medium, with the movement occurring at a position where the third reference signal is recorded. The control circuit causes a rotation of the motor for moving the reproducing transducer along the radial direction of the disc, according to the number of feed pulses that are obtained from the feed pulse forming circuit.

REFERENCES:
patent: 4190859 (1980-02-01), Kinso
patent: 4247741 (1981-01-01), Tatsuguchi et al.
patent: 4322748 (1982-03-01), Tatsuguchi
patent: 4330879 (1982-03-01), Wine
patent: 4331976 (1982-05-01), Kinjo et al.
patent: 4340907 (1982-07-01), Hirata et al.

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