Feedback arrangement in a deflection circuit

Details Feedback arrangement in a deflection circuit Feedback arrangement in a deflection circuit

1991-03-15

1992-02-11

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315387, 315408, H01J 2970, H01J 2972

Patent

active

050878638

ABSTRACT:
A driver stage of a horizontal deflection output transistor includes a transformer having a first winding coupled to a collector of a second, driver transistor responsive to an input signal at a horizontal deflection frequency. A second winding of the transformer is coupled across a base-emitter junction of the output transistor and a third winding is coupled to the emitter of and in series with the output transistor. The third winding couples the emitter current to the base of the output transistor for supplying a substantial portion of the base current during the second half of trace. A feedback network is coupled between a trace capacitor coupled to a horizontal deflection winding and the collector of the driver transistor for preventing abnormal steady state operation in the output transistor.

REFERENCES:
patent: 3174073 (1965-03-01), Massman et al.
patent: 3512040 (1970-05-01), Lester
patent: 4028589 (1977-06-01), Verbeij
patent: 4272705 (1981-06-01), Beaumont
patent: 4323825 (1982-04-01), Hayes
patent: 4412157 (1983-10-01), Gamboa
patent: 4468593 (1984-08-01), Haferl
patent: 4647823 (1987-03-01), Luz
A schematic diagram of a Chassis B-6510 of a television receiver Appollo 2550.
U.S. patent application Ser. No. 481,426, filed 04/21/89 in the name of B. E. Hennig.

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