Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1989-02-21
1990-03-20
Tarcza, Thomas H.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2956
Patent
active
049104411
ABSTRACT:
The power demand of a dynamic audio load is monitored, for example, by sensing the voltage level of the power supplying the audio load. An audio load control signal corresponding to the power demand is generated. The audio load control signal is advantageously applied to a circuit for producing a side pincushion correction current, for modulating the side pincushion correction current by the audio load demand. The audio load modulated side pincushion correction current is used to modulate a horizontal deflection current in order to compensate for both side pincushion distortion and dynamic audio load induced raster width distortion. A filter network may also be provided for removing high frequency signal components from the audio load control signal.
REFERENCES:
patent: 4129806 (1978-12-01), Haferl
patent: 4184104 (1980-01-01), Shouse, Jr.
patent: 4223251 (1980-09-01), Haferl
patent: 4254365 (1981-03-01), Knight
patent: 4298829 (1981-11-01), Luz
patent: 4604556 (1986-08-01), Haferl
Co-pending application Ser. No. 190,983 entitled Raster Size Regulating Circuit--Fernsler.
Co-pending application Ser. No. 273,529 entitled Power Supply Protection Circuit--Wilber, et al.
RCA Field Service Guide, vol. 10, pp. 37 & 43.
Fried Harvey D.
Issing Gregory C.
Laks Joseph J.
Tarcza Thomas H.
Thomson Consumer Electronics Inc.
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