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:
Aug. 14, 1990
Filed:
Oct. 31, 1988
Eugene R Bukowski, Jr, South Bend, IN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Disclosed is a generator and method for using the generator to negate offset voltages in operational amplifiers. The generator includes an operational amplifier (op amp) whose input stage includes a current source coupled to a differential pair of input devices. The physical characteristics of the devices are such that an intentional offset voltage greater than the normal op amp offset voltage is provided in the input stage. The output terminal of the generator op amp is connected to the substrate terminal of one of the input devices. The offset voltages of other op amps can be negated by interconnecting the substrate terminal of one device in each input differential pair to the output terminal of the generator op amp and creating an intentional offset voltage in the input differential pair of each op amp.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile