Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1992-10-08
1993-10-05
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315389, 315387, H01J 2970, H01J 2976
Patent
active
052508790
ABSTRACT:
In a vertical sawtooth generator of a vertical deflection circuit, a first comparator generates an output signal when a retrace portion of a sawtooth signal is at a first magnitude to initiate a vertical trace portion of the sawtooth signal. An amplifier responsive to the sawtooth signal generates a feedback current at a time that occurs more than one-half of the length of vertical trace portion after vertical trace is initiated. The feedback current is coupled to a capacitor to develop a capacitor voltage. The capacitor voltage is applied via a voltage-to-current converter to an integrating capacitor to develop in the integrating capacitor the trace portion of the sawtooth signal.
REFERENCES:
patent: 4277729 (1981-07-01), Rodgers, III
patent: 4314183 (1982-02-01), Heuze et al.
patent: 4490653 (1984-12-01), Olmstead
patent: 4686432 (1987-08-01), Berland et al.
patent: 4737691 (1988-04-01), den Hollander et al.
An article entitled A New Video Process for Color TV in the names of Yamamoto et al., dated 1988 and publ. by IEEE.
Appl. Ser. No. 843,074, filed Mar. 2, 1992 in the names of Wilber et al. and entitled Resistor-Matched Deflection Apparatus for a Video Display.
Appl. Ser. No. 843,062, filed Mar. 2, 1992 in the names of Koblitz et al. and entitled Service Switch for Video Display Deflection Apparatus.
Appl. Ser. No. 843,061, filed Mar. 2, 1992 in the names of Koblitz et al. and entitled Service Adjustment Arrangement for a Sawtooth Generator of a Video Display.
Appl. Ser. No. 843,075, filed Mar. 2, 1992 in the name of E. Rodriquez-Cavazos and entitled A Generator for Sawtooth Signal with Selectable Retrace Slope for a Deflection Apparatus.
Blum Theodore M.
Henig Sammy S.
Laks Joseph J.
Thomson Consumer Electronics S.A.
Tripoli Joseph S.
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