Circuit arrangement for supplying a protection signal for a tele

Details Circuit arrangement for supplying a protection signal for a tele Circuit arrangement for supplying a protection signal for a tele

1978-03-17

1979-11-27

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2952

Patent

active

041763017

ABSTRACT:
To obtain a protection signal, an additional blanking signal is generated during field blanking, this signal being cancelled before the end of the blanking period of the circuit functions in a normal manner. Consequently, checking the proper operation takes place instantaneously in every period and without an external capacitor. If field retrace pulses are absent the electron beam in the picture tube is permamently cut off.

REFERENCES:
patent: 3281623 (1966-10-01), Peterson et al.

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