Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1992-07-10
1993-11-23
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315389, 315403, H01J 2954
Patent
active
052647625
ABSTRACT:
A first voltage-to-current converter responsive to a picture height adjustment control signal generates a first current in a capacitor for producing a trace portion of a sawtooth signal in the capacitor having a rate of change that is adjustable in accordance with an adjustment of the control signal. A second voltage-to-current converter responsive to the control signal generates a second current in a resistor for producing a third signal that is adjustable in accordance with the control signal. The sawtooth and third signals are coupled via a differential amplifier to a vertical deflection winding to produce a vertical deflection current in accordance with a difference between the sawtooth and third signals such that picture height adjustment does not affect vertical centering.
REFERENCES:
patent: 4048544 (1977-09-01), Haferl
patent: 4088931 (1978-05-01), Haferl
patent: 4277729 (1981-07-01), Rodgers
patent: 4645987 (1987-02-01), Kiteley et al.
Appl. Ser. No. 843,061, filed Mar. 2, 1992 the names of Koblitz et al. and entitled Service Adjustment Arrangement For A Sawtooth Generator of a Video Display.
Appl. Ser. No. 911, 421, filed Jul. 10, 1992 in the names of Wilber et al. and entitled Vertical Deflection Arrangement For Zoom and Pan Features.
Appl. Ser. No. 911,605, filed Jul. 10, 1992 in the name of J. A. Wilber and entitled Reduced Dissipation Vertical Deflection Circuit For Zoom Mode Operation.
Appl. Ser. No. 911,600, filed Jul. 10, 1992 in the name of J. A. Wilber and entitled A Vertical Deflection Arrangement With S-Correction.
An article entitled a New Video Processor For Color TV in the names of Yamamoto et al., dated 1988 and published by IEEE.
Blum Theodore M.
Henig Sammy S.
Laks Joseph J.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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