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. 19, 1990
Filed:
Sep. 07, 1989
Applicant:
Inventor:
Raymond C Yan, Daly City, CA (US);
Assignee:
Teledyne Industries, Inc., Mountain View, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323314 ; 323907 ;
Abstract
In a circuit for providing a bandgap voltage reference, a first current proportional to the thermal voltage V.sub.T is generated by a first current source. By means of current mirror operation, the first current induces a second current source to generate a proportional second current. The second current source is coupled to means which generates a first voltage which is proportional to the base-emitter junction of a bipolar transistor. The second current generates a second voltage which is then added to the first voltage to give the voltage reference.