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:
Aug. 12, 1997
Filed:
Sep. 26, 1996
Wilhelm Wilhelm, Munich, DE;
Josef Hoelzle, Bad Woerishofen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
Circuit arrangement for generating a bias potential includes a first transistor connected on a collector side thereof to a supply potential, a first resistor connected between a base and the collector of the first transistor, a first current source connected between the base of the first transistor and a reference potential, a second current source connected between an emitter of the first transistor and the reference potential, a second transistor connected on a collector side thereof to the supply potential and on a base side thereof to the emitter of the first transistor, a third current source connected between the emitter of the second transistor and the reference potential, a third transistor carrying the bias potential on a collector side thereof, a second resistor connected between the emitter of the second transistor and a base of the third transistor, a third resistor connected between the collector of the third transistor and the supply potential, a first diode connected in the forward direction thereof between the base of the third transistor and the reference potential, and a fourth resistor connected between an emitter of the third transistor and the reference potential, the second and the third resistors having equal resistances and the fourth resistor having half the resistance of the second and the third resistors, respectively, and second and third current sources supplying a current which is dependent upon a collector current of the third transistor.