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:
Jul. 26, 1983
Filed:
Dec. 23, 1980
Robert Hornung, Mennecy, FR;
Gerard Lebesnerais, Perthes En Gatinis, FR;
International Business Machines Corp., Armonk, NY (US);
Abstract
A system is disclosed for compensating for the offset voltage problem which occurs in certain types of differential amplifiers; a differential amplifier, in the form of an operational amplifier, is provided with two generators of input signals whose difference is to be amplified; further included is an offset voltage compensation loop comprising a comparator, an n-bit up/down counter and a digital analog converter means; the output of said means being connected to said generators of input signals so as to modulate the input signals; and said digital analog converter means including first and second n-1 bit digital analog converters.