Television receiver high voltage protection circuit

Details Television receiver high voltage protection circuit Television receiver high voltage protection circuit

1981-06-24

1983-10-25

Murray, Richard

Facsimile and static presentation processing

Facsimile

Recording apparatus

315411, H04N 568

Patent

active

044122543

ABSTRACT:
A high voltage holddown circuit is used in a television receiver which derives high voltage potential from horizontal flyback pulses and which provides horizontal rate signals to the horizontal deflection circuit via a high frequency countdown arrangement. The holddown circuit operates by changing the divider modulus of the countdown circuitry during an overvoltage condition which reduces the amplitude of the flyback pulses and consequently reduces the high voltage.

REFERENCES:
patent: 3611002 (1971-10-01), Wedam
patent: 3688031 (1972-08-01), Fitzgerald, Jr. et al.
patent: 3692932 (1972-09-01), Wilmarth
patent: 3789260 (1974-01-01), Ahrens
patent: 3813580 (1974-05-01), Norman
patent: 3885201 (1975-05-01), Fernsler
patent: 4058754 (1977-11-01), Ohnishi et al.
patent: 4074323 (1978-02-01), Griffey

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