Cathode ray tube deflection circuit with solid state switch

Details Cathode ray tube deflection circuit with solid state switch Cathode ray tube deflection circuit with solid state switch

1989-06-27

1990-03-06

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315397, H01J 2970, H01J 2976

Patent

active

049069047

ABSTRACT:
A solid-state switch in a deflection circuit includes a plurality of field-effect transistors (Q7, Q8, and Q9) connected in series. Each of the transistors (Q7, Q8, and Q9) is part of a switching module (20, 22, and 24) in the form of a three-terminal transistor circuit. Two of the modules (20 and 22) are connected to a common gating terminal (12) solely by diodes (D6 and D7) oriented so as (a) to conduct current in the direction required to provide a turn-on signal for the transistors (Q7 and Q8) but (b) to isolate the common gating terminal (12) from the high voltages experienced by the transistors (Q7 and Q8) when they are in their non-conducting states.

REFERENCES:
patent: 4242714 (1980-12-01), Yoshida et al.
patent: 4487457 (1984-12-01), Janutka
patent: 4500801 (1985-02-01), Janutka
patent: 4535273 (1985-08-01), Midland
patent: 4556825 (1985-12-01), Thomas
patent: 4580063 (1986-04-01), Torelli et al.
patent: 4692693 (1987-09-01), Tokunaga et al.
patent: 4751408 (1988-06-01), Rambert
patent: 4777387 (1988-10-01), Collins

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