Horizontal deflection circuit

Details Horizontal deflection circuit Horizontal deflection circuit

1991-07-15

1993-05-18

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358188, 358190, H04N 327

Patent

active

052125521

ABSTRACT:
A variable horizontal oscillator oscillates at a frequency dependent on a first control voltage. A horizontal output circuit generates a horizontal deflection current which is synchronous with an oscillation output signal from the variable horizontal oscillator. The horizontal sync frequency of an input video signal is detected. Second and third control voltages are generated which depend on the detected horizontal sync frequency. A dependence of the second control voltage upon the detected horizontal sync frequency differs from a dependence of the third control voltage upon the detected horizontal sync frequency. A power supply voltage to the horizontal output circuit is varied in accordance with the second control voltage. The third control voltage is applied to the variable horizontal oscillator as the first control voltage.

REFERENCES:
patent: 4673984 (1987-06-01), Kikuchi et al.
patent: 5124792 (1992-06-01), Shimaoka

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