Circuit configuration for generating a reference potential

US5969566A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Stephan Weber · Munich, DE
• Udo Matter · Düsseldorf, DE
• Stefan Heinen · Krefeld, DE

Key dates

• Filing date: Jun 20, 1997
• Grant date: Oct 19, 1999
• Expiry date: Jun 20, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F3/222
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A circuit for generating a reference potential includes a first transistor having an emitter connected to a ground potential, a base, and a collector connected to the base; a second transistor having a base connected to the base of the first transistor; a first resistor connected between the collector of the first transistor and an output terminal outputting the reference potential; a second resistor connected between the collector of the second transistor and the output terminal; a third resistor connected between the emitter of the second transistor and ground potential; a third transistor having a base connected to the collector of the second transistor, and an emitter connected to the ground potential; a fourth transistor having a collector connected to a supply potential, an emitter connected to the output terminal, and a base connected to the collector of the third transistor; a first current source connected between the base and the collector of the fourth transistor; and a second current source connected in parallel with the first current source, the second current source generating a compensation current compensating for current fluctuations of the first current source.