Multisync horizontal drive generator

Details Multisync horizontal drive generator Multisync horizontal drive generator

1993-10-04

1995-10-03

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

327132, H01J 2970, H01J 2976

Patent

active

054554934

ABSTRACT:
A multisync horizontal drive generator for use in a television receiver or computer monitor display is operative in response to an applied horizontal scan synchronizing signal. A delay network couples the horizontal sync signal to a gated detector which compares the delayed horizontal sync signal to a differentiated horizontal scan flyback signal to produce an error signal. A gain adjustable error amplifier couples the error signal to a summing network which includes a nominal frequency input. A range control detects the frequency of the horizontal drive signal and applies a range control signal to the summing network. The combined signal inputs are coupled from the summing network to a signal controllable current source which drives a saw forming network to produce a horizontal scan signal. A multiscan decoder controls a pair of current mirrors in response to a multiscan code input to couple the output currents of the current mirror to the saw former to produce horizontal scan drive signals having frequency multiples of the horizontal sync frequency.

REFERENCES:
patent: 4547710 (1985-10-01), Bond et al.

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