Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1996-03-29
1997-12-30
Issing, Gregory C.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315408, G09G 104, H01J 2970
Patent
active
057034451
ABSTRACT:
In a vertical sawtooth generator, an end time of a retrace portion of a vertical sawtooth signal is controlled by an output signal of a comparator. The comparator has a first input terminal that is responsive to a reference voltage and a second input terminal that is responsive to the sawtooth signal. The reference voltage is coupled to an input terminal of an amplifier of an integrator that generates the sawtooth signal. Any disturbance signal component in the reference voltage is super-imposed on the sawtooth signal. Because the same disturbance signal component is developed simultaneously in both input terminals of the comparator, a high degree of common mode rejection is provided with respect to the disturbance signal component.
REFERENCES:
patent: 4835727 (1989-05-01), Boon et al.
patent: 4945292 (1990-07-01), Ackerson et al.
patent: 5216336 (1993-06-01), Rodriguez-Cavazos
patent: 5250879 (1993-10-01), Koblitz
patent: 5264762 (1993-11-01), Wilber
"A New Video Processor For Color TV" by Y. Yamamoto, et al. pp. 443-451.
Henig Sammy S.
Issing Gregory C.
Laks Joseph J.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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