The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 1995
Filed:
Oct. 04, 1993
Kishan R Pulluru, Willowbrook, IL (US);
Khosro M Rabii, Arlington Heights, IL (US);
Zenith Electronics Corporation, , DE (US);
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.