Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1997-05-30
1999-09-07
Issing, Gregory C.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315395, 315410, G09G 104, H01J 2974
Patent
active
059492015
ABSTRACT:
A series circuit of first and second damper diodes (4a, 4b) and a series circuit of first and second resonance capacitors (5a, 5b) are connected in parallel between a collector and an emitter of a horizontal transistor (3). A series circuit of a horizontal deflecting winding (6), a capacitor (7) for an S-character correction, a capacitor (8) for blocking a direct current and a winding (9) for pin distortion modulation is connected in parallel between the collector and the emitter of the transistor (3). Further, connecting intermediate points of the damper diodes (4a, 4b), the resonance capacitors (5a, 5b) and the capacitors (7, 8) are connected to one another. A series circuit of a second capacitor (13) for the S-character correction and a switching device (14) formed of e.g., a MOS-FET element is connected in parallel to the capacitor (7) for the S-character correction. The switching device (14) is connected with a driving circuit (16) for supplying an arbitrary control pulse signal thereto from a saw tooth wave generating circuit (15a) and a comparing circuit (15b). According to the above-mentioned arrangement, the linearity and intermediate pin distortion do not become worse even when a deflecting width is changed.
REFERENCES:
patent: 4501995 (1985-02-01), Olmstead et al.
patent: 4533855 (1985-08-01), Willis et al.
patent: 4761586 (1988-08-01), Wharton
patent: 5416389 (1995-05-01), Merlo et al.
patent: 5517090 (1996-05-01), Bando
patent: 5530488 (1996-06-01), Rilly et al.
Kono Eiji
Suzuki Hitoshi
Frommer William S.
Issing Gregory C.
Sony Corporation
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