Dynamic focus system cascode amplifier

Details Dynamic focus system cascode amplifier Dynamic focus system cascode amplifier

1985-09-03

1986-11-11

Mullins, James B.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

330156, 330311, H01J 2958

Patent

active

046224980

ABSTRACT:
Dynamic focus system utilizing an improved cascode amplifier is provided wherein the amplifier provides substantial voltage gain for a composite horizontal and vertical parabola signal and the output of the cascode amplifier is provided to the focus control electrode of a cathode ray tube. Undesired phase shift of the output of the cascode amplifier is prevented by AC coupling a signal corresponding to the noninverted input signal applied to the cascode amplifier to the base of the second transistor of the cascode amplifier.

REFERENCES:
patent: 3239773 (1966-03-01), Kaufman
patent: 4079336 (1978-03-01), Gross
patent: 4214188 (1980-07-01), Bafaro et al.
patent: 4230972 (1980-10-01), Bafaro
patent: 4270126 (1981-05-01), Bafaro
patent: 4473780 (1984-09-01), Gent
patent: 4484147 (1984-11-01), Metz
"Disc Preamp," Elektor, vol. 4, No. 7-8, Jul./Aug. 1978, pp. 7-71.
IBM Technical Disclosure Bulletin, G. E. Beers, vol. 22, No. 6, Nov. 1979.
Electronic Engineering, D. Ivekovic, Dec., 1967, p. 739.

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