Vertical deflection circuit

Details Vertical deflection circuit Vertical deflection circuit

1979-01-17

1980-05-13

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315397, H01J 2970

Patent

active

042030560

ABSTRACT:
Disclosed is a vertical deflection circuit in which first and second NPN output transistors are connected in series to make up a single-ended push-pull circuit. A vertical deflection coil and a low-value resistor are connected in series between the output terminal of the push-pull circuit and the earth. The second NPN output transistor is driven by a driving transistor which amplifies the oscillated signal produced from a vertical oscillation stage. The voltage generated at the junction point of the vertical deflection coil and the low-value resistor is fed back to the driving transistor. An emitter resistor is inserted between the emitter of the second NPN output transistor and the earth, while a resistor for differentiating the amount of feedback in the former and latter halves of the vertical scanning period is inserted between the emitter of the second NPN transistor and the junction point.

REFERENCES:
patent: 3426245 (1969-02-01), Yurasek et al.
patent: 3781589 (1973-12-01), Brockmann
patent: 3986077 (1976-10-01), Araz
patent: 4023069 (1977-05-01), Peer
patent: 4119891 (1978-10-01), Soldner et al.

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