Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1977-09-06
1978-12-12
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
H01J 2956
Patent
active
041298063
ABSTRACT:
A horizontal deflection circuit drives a load such as an ultor voltage generator which is subject to load variations. Raster distortion is corrected by a switched pincushion correction circuit. Further raster distortion due to load-dependent retrace time modulation is corrected by a corrective circuit which includes a retrace duration sensing circuit for generating a control signal representative of the horizontal retrace pulse duration. The control signal is coupled to the pincushion correction circuit so that it acts additionally in a manner to compensate the load-dependent raster size variations.
REFERENCES:
patent: 3968403 (1976-07-01), Ogawara
Blum Theodore M.
Meise William H.
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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