Sine wave deflection circuit for bidirectional scanning of a cat

Details Sine wave deflection circuit for bidirectional scanning of a cat Sine wave deflection circuit for bidirectional scanning of a cat

1984-03-29

1987-01-06

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

H01J 2976

Patent

active

046349405

ABSTRACT:
A capacitively coupled square wave generator provides a steady state sinusoidal current flow in a deflection winding of a cathode ray tube. The deflection winding, the capacitive coupling and an additional capacitor form a tank circuit which filters out the odd harmonics of the square wave generator to provide a sinusoidal current in the deflection winding to produce bidirectional scanning.

REFERENCES:
patent: 3026486 (1962-03-01), Pintell
patent: 3209231 (1965-09-01), Pintell
patent: 3247468 (1966-04-01), Pintell
patent: 3809947 (1974-05-01), Ambrico et al.
IBM Technical Disclosure Bulletin, vol. 14, No. 4, dated Sep. 1971, entitled Amplitude Regulation of a Sine-Wave Deflection System by Pulse Width Modulation, by S. G. Katsafouros.
IBM Technical Disclosure Bulletin vol. 21 No. 12, dated May 1979, entitled Bidirectional Scan for CRT by A. S. Murphy.

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