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:
Jul. 25, 2000
Filed:
Apr. 21, 1999
Applicant:
Inventor:
Franz Wachter, Villach, AT;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323315 ; 323314 ;
Abstract
A reference voltage circuit has a bipolar transistor circuit supplying a reference voltage corresponding to a summation voltage formed from a forward voltage of a pn junction through which current flows, and a difference voltage between two forward voltages of pn junctions which are operated with different current densities. The reference voltage circuit includes a calibration device that can be used to change collector currents of the bipolar transistor circuit. This is achieved, in particular, by corrupting the mirroring ratio of a current mirror circuit provided for the bipolar transistor circuit.