CRT focus control circuit

Details CRT focus control circuit CRT focus control circuit

1984-02-02

1985-07-16

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315371, H01J 2958

Patent

active

045299153

ABSTRACT:
A focus control circuit particularly well suited for use with a cathode-ray tube having a quadrapole lens includes automatic tracking focus and astigmatism features to ensure a well-focused display with minimum focus readjustment.

REFERENCES:
patent: 3961223 (1976-06-01), Ray et al.
patent: 4162403 (1979-07-01), Baumgarten
patent: 4249112 (1981-02-01), McKibben

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