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. 27, 1998
Filed:
Dec. 21, 1995
Applicant:
Inventors:
Michael F Dries, Chanhassen, MN (US);
Benjamin L Gingerich, Plymouth, MN (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
327539 ; 327538 ; 327 70 ; 327 83 ; 327 99 ; 323313 ;
Abstract
A voltage reference circuit includes at least a first and a second voltage supply having different operating temperature ranges. Output voltages of the two voltage supplies are compared and one of the supplies is selected to provide an optimum voltage reference.