Delayed kinescope blanking pulse generator

Details Delayed kinescope blanking pulse generator Delayed kinescope blanking pulse generator

1977-08-31

1978-11-21

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2952

Patent

active

041268156

ABSTRACT:
A delayed transition kinescope blanking pulse generator has a capacitor supplied with charging current from a first current source. A switched second current source controlled by the blanking cycle initiation pulse provides a discharging current greater than the charging current. The capacitor is initially uncharged. When the blanking cycle is initiated the second controlled current source is turned off and the capacitor charges. When the capacitor ramp voltage reaches a particular value after a charging delay a voltage-sensitive switch produces a kinescope blanking pulse. When the blanking cycle initiation pulse ends, the second current source turns on and discharges the capacitor. A current-sensitive switch responsive to the discharge current maintains the kinescope blanking pulse until the capacitor is discharged.

REFERENCES:
patent: 3931545 (1976-01-01), Marino

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