Protection circuit for a horizontal scanning circuit and CRT

Details Protection circuit for a horizontal scanning circuit and CRT Protection circuit for a horizontal scanning circuit and CRT

1982-02-02

1983-10-25

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315408, 358220, H01J 2970, H01J 2972

Patent

active

044121571

ABSTRACT:
One circuit, providing a feedback signal from the horizontal output transistor to the horizontal drive circuit, prevents damage to the output transistor in the event of a disruption or noise in the input signal, and also prevents "spot burn" of the CRT screen if the input signal should fail while there is still a charge on the CRT.

REFERENCES:
patent: Re27492 (1972-09-01), Wheatley, Jr.
patent: Re27793 (1973-10-01), Burrus
patent: 3641361 (1972-02-01), Limbert et al.
patent: 3774069 (1973-11-01), Yasumatsuya
patent: 4056758 (1977-11-01), Schaas

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