Switched mode vertical amplifier with elimination of feedback ri

Details Switched mode vertical amplifier with elimination of feedback ri Switched mode vertical amplifier with elimination of feedback ri

1976-09-20

1978-03-14

Wilbur, Maynard R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315403, 315370, H01J 2956

Patent

active

040792935

ABSTRACT:
A capacitor is coupled to a vertical deflection winding for forming a resonant circuit therewith during retrace. A switched mode vertical deflection amplifier generates trace current in the deflection winding. A feedback resistor samples the current in the deflection winding and provides a feedback voltage to the amplifier. In order to substantially diminish a ringing component of the trace current at the beginning of trace, a cancellation circuit provides the amplifier with a voltage which cancels the feedback voltage during at least the latter portion of retrace.

REFERENCES:
patent: 3947723 (1976-03-01), Thompson

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