Band gap circuit

US4644257A · kind A · utility

Assignee

• Telefunken Electronic GmbH · DE

Inventors

• Rolf Bohme · Midrand, ZA
• Heinz Rinderle · Heilbronn, DE
• Martin Siegle · Heilbronn, DE

Key dates

• Filing date: Jun 14, 1984
• Grant date: Feb 17, 1987
• Expiry date: Jun 14, 2004

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F3/30
• WIPO field: Control
• WIPO sector: Instruments

Abstract

The present invention relates to a band gap circuit for providing an integral multiplication of an elementary band gap voltage. The circuit comprises a first transistor having its base connected to its collector via a resistor, a second transistor which is connected at its base to the collector of the first transistor, and a third transistor which is connected at its base to the collector of the second transistor, with the emitters of the three transistors being connected to one pole of a supply source. A fourth transistor is provided in emitter follower configuration and connected between the emitter of the fourth transistor and a connection point, is a series connection comprising at least one resistor and at least one diode.