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:
Jun. 13, 1995
Filed:
Aug. 27, 1993
Alex Gusinov, Brighton, MA (US);
A Paul Brokaw, Burlington, MA (US);
Douglas W Babcock, Manchester, NH (US);
Lewis Counts, Lexington, MA (US);
Lawrence DeVito, Tewksbury, MA (US);
Robert A Duris, Hubbardston, MA (US);
Scott Wurcer, Cambridge, MA (US);
Analog Devices Inc., Norwood, MA (US);
Abstract
A circuit for varying the temperature of a first bipolar transistor in order to thermally compensate for self-heating effects of an associated device in a common signal path with the first transistor, the first transistor being configured within an isolated collector region. The circuit includes a second bipolar transistor provided within the isolated collector region and thermally coupled to the first transistor, the second transistor operable for providing heat to the first transistor to alter the temperature to a predetermined level, thus changing the operational voltage characteristics of the first transistor so as to minimize shifts in offset voltage.