Degaussing circuit for television receiver having switched mode

Details Degaussing circuit for television receiver having switched mode Degaussing circuit for television receiver having switched mode

1982-11-26

1984-04-03

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Pulse storing

361150, H04N 929

Patent

active

044410522

ABSTRACT:
A switched mode power supply for a remote controlled television receiver incorporates a degaussing circuit having a relay that is required to be energized in order to permit operation of the degaussing circuit. Power to energize the relay is derived from a power supply switch transistor protection circuit which removes residual stored energy from the power transformer primary winding. This stored energy is used to charge a capacitor during the time the switch transistor is nonconductive. The capacitor is discharged to provide current to energize the deguassing circuit relay in order to permit ac mains current to flow through the degaussing coil.

REFERENCES:
patent: 3358182 (1967-12-01), Bohnstedt
patent: 3784868 (1974-01-01), Shinkai et al.
patent: 3947632 (1976-03-01), Giger et al.
patent: 3955115 (1976-05-01), Manske
patent: 3986075 (1976-10-01), Manske
patent: 4262232 (1981-04-01), Willis
patent: 4295078 (1981-10-01), Wilmarth

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