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:
Jan. 01, 2002
Filed:
May. 11, 2000
Applicant:
Inventor:
Bruce Michael Furman, Palo Alto, CA (US);
Assignee:
Maxim Integrated Products, Inc., Sunnyvale, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 3/04 ; H03F 3/45 ;
U.S. Cl.
CPC ...
H03F 3/04 ; H03F 3/45 ;
Abstract
A balanced input circuit which is used with an operational amplifier to obtain the difference between two input signals. In a temperature sensor application, one input signal is proportional to absolute temperature (PTAT) and one signal is complimentary to absolute temperature (CTAT) with the CTAT signal being the base-emitter voltage (V ) of a bipolar transistor. In this application the operational amplifier output is the PTAT signal minus V times a scale factor determined by the feedback loop of the operational amplifier.