Circuit for generating a deflection current through the field de

Details Circuit for generating a deflection current through the field de Circuit for generating a deflection current through the field de

1984-01-31

1985-08-20

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315403, H01J 2970, H01J 2972

Patent

active

045366829

ABSTRACT:
A circuit for generating a deflection current through the field deflection coil of a picture display device having a sawtooth generator, a combining stage, a multiplying circuit and an amplifier. Applied to the combining stage is a sawtooth signal generated by the sawtooth generator and a sawtooth signal originating from feedback. The combining stage generates three linear combinations of these input signals. Two linear combinations are applied to the multiplying circuit for obtaining a parabolic signal which is applied to a signal input terminal of the amplifier, whereas the third linear combination is applied to the feedback input terminal of the amplifier. The series arrangement of the deflection coil and a separating capacitor is coupled to the output terminal of the amplifier, a feedback network being included between the said series network and the combining stage.

REFERENCES:
patent: 4147963 (1979-04-01), Shiotani
patent: 4176300 (1979-11-01), Waehner
patent: 4289994 (1981-09-01), Beaumont et al.

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