Circuitry for automatically switching the control speed of a pha

Details Circuitry for automatically switching the control speed of a pha Circuitry for automatically switching the control speed of a pha

1988-05-11

1989-08-22

Blum, Theodore M.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

331 20, H03L 700, H04N 504

Patent

active

048601020

ABSTRACT:
1. Circuitry for automatically switching the control speed of a phase-control circuit.
2.1. The switching is, especially in conjunction with different signal sources employed with a television receiver, either difficult or possible only by reserving prescribed program locations. The advantage of the invention is that it becomes possible to switch over without great expenditure to the higher control speed only while necessary and back to the low speed when it no longer needs to be high.
2.2. The invention is characterized in that a control circuit 12 increases the control speed, independent of whatever signal source is being employed to produce the picture, only during vertical flyback.
2.3. The circuit can be employed in television receivers to reproduce both broadcast television signals and video signals from a recorder connected to the receiver.

REFERENCES:
patent: 4461999 (1984-07-01), Wolf et al.
patent: 4553163 (1985-11-01), Sauer

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