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:
Dec. 09, 1986
Filed:
Jul. 31, 1985
Applicant:
Inventors:
Mark S Birrittella, Phoenix, AZ (US);
Robert R Marley, Phoenix, AZ (US);
Keith D Nootbaar, Chandler, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323314 ; 323316 ; 323907 ;
Abstract
An all NPN bandgap voltage reference is provided that includes a Widlar type temperature coefficient compensation circuit. A pair of NPN differentially connected transistors maintain a constant current in the Widlar circuit over variations in power supply voltage V.sub.EE while causing an increase in current in the Widlar circuit as temperature increases for maintaining a constant output voltage.