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:
Nov. 22, 1994
Filed:
Oct. 30, 1992
Khosro M Rabii, Arlington Heights, IL (US);
Zenith Electronics Corp., Glenview, IL (US);
Abstract
A geometry correction waveform synthesizer includes a plurality of DC controlled multipliers each coupled to respective sources of complimentary geometry correction signals. The DC controlled multipliers are coupled to respective gain control voltage sources as well as null adjustment voltage sources to provide a variable amplitude and polarity correction signal output. The individual correction signal outputs of the DC controlled multipliers are combined to form a composite geometry correction signal which is applied to a gain control circuit. The individual gain control signals used by the DC controlled multipliers are added to form a combined gain control signal which is used to control the composite correction signal amplitude and maintain correction signal amplitude within a predetermined range. An overall gain control couples the composite geometry correction signal to the scan system.