Vertical deflection circuit

Details Vertical deflection circuit Vertical deflection circuit

1975-11-12

1977-06-21

Wilbur, Maynard R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315397, H01J 2970, H01J 2976

Patent

active

040314308

ABSTRACT:
This invention relates to improvements in a vertical deflection circuit employing a class D amplifier. The circuit comprises a pulse width modulator for converting a sawtooth waveform signal to a width modulated pulse train, a switch mode power amplifier for amplifying said width modulated pulse train, a demodulating filter circuit for demodulating said width modulated pulse train to the sawtooth waveform, a damping circuit for preventing a significant power loss in said demodulating filter circuit and a deflection yoke coupled to said demodulating filter circuit, thereby making it possible to reduce power dissipation in the circuit.

REFERENCES:
patent: 3456150 (1969-07-01), Attwood
patent: 3939380 (1976-02-01), Peer

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