Self adjusting blanking signal generator

Details Self adjusting blanking signal generator Self adjusting blanking signal generator

1992-08-31

1994-04-05

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315386, G09G 104, H01J 2970

Patent

active

053008650

ABSTRACT:
A scanning circuit which utilizes blanking pulses between flyback pulses in a display device includes a line blanking circuit which prevents the generation of spurious blanking pulses by ringing in the blanking pulses. The line blanking circuit includes a capacitor for storing a reference voltage. A comparator is responsive to the reference voltage and to the flyback pulses and provides the blanking pulses when the flyback pulses exceed the reference voltage. The comparator is prevented from resetting for a preselected time period after the falling edge of the blanking pulse and spurious blanking pulses can not be generated during the preselected time period.

REFERENCES:
patent: 4134046 (1979-01-01), Ahmed
patent: 4260935 (1981-04-01), Colombo
patent: 4942471 (1990-07-01), Chikuma et al.

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