Diode modulator with raster width regulation

Details Diode modulator with raster width regulation Diode modulator with raster width regulation

H - Electricity

01

J

355/9

H01J 29/56 (2006.01) H04N 3/233 (2006.01)

Patent

CA 1254667

Abstract A high voltage generator develops an ultor voltage to accelerate an electron beam of a picture tube. The high voltage generator draws a resupply current in accordance with beam current loading by the picture tube. The deflection circuitry generates line and field deflection currents in respective line and field deflection windings to enable the electron beam to scan a raster. A diode modulator, including a differential amplifier input stage and an emitter-follower output stage, modulates the amplitude of the line deflection current to provide side pincushion correction. The voltage at a high voltage resupply current terminal of the high voltage generator is coupled in a nonlinear manner to the differential amplifier for nonlinearly modulating the amplitude of the line deflection current in accordance with beam current loading.

524660

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