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:
Feb. 27, 2001
Filed:
Apr. 13, 1999
Marcellus R. Chen, Fremont, CA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A system for adaptively trimming the input offset voltage of an op amp employing an input stage with complementary differential pairs provides accurate VD,trimming over the amplifier's entire common-mode input range, by providing an “adaptive” trim signal that varies with the current conducted by one of the complementary pairs. Switching circuitry insures that only one differential pair is active at a time, except in a transition region in which both pairs are partially conducting. The use of an adaptive trim signal enables V,to be kept low over the full range of common-mode input voltages, including in the amplifier's transition region.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile