Horizontal deflection circuit with timing correction

Details Horizontal deflection circuit with timing correction Horizontal deflection circuit with timing correction

1976-11-19

1977-12-13

Wilbur, Maynard R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358159, 315387, H01J 2956

Patent

active

040631338

ABSTRACT:
A horizontal deflection circuit comprises a deflection winding, an output deflection circuit for generating deflection current and retrace pulses, an oscillator and driver circuit for providing drive signals to the output deflection circuit, a frequency and phase control circuit for synchronizing the deflection current with incoming sync pulses, and a correction circuit. The correction circuit corrects for variations in initiation of retrace which are not adjusted by the frequency and phase control circuit, such as caused by variations in storage time delay of an output transistor. The correction circuit includes a sawtooth generator for obtaining a sawtooth voltage from a retrace pulse and a peak separator to which the sawtooth voltage is coupled for generating voltage pulses for providing a correction voltage to the oscillator and driver circuit.

REFERENCES:
patent: 4009426 (1977-02-01), Bohringer
patent: 4013923 (1977-03-01), Den Hollander

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