Precision reference voltage source

US5258702A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Gerhard Conzelmann · Echterdingen, DE
• Karl Nagel · Gomaringen, DE
• Gerhard Fiedler · Neckartailfingen, DE
• Andreas Junger · Reutlingen, DE

Key dates

• Filing date: Oct 1, 1991
• Grant date: Nov 2, 1993
• Expiry date: Oct 1, 2011

Classification

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

Abstract

A monolithically integrated precision reference voltage source by the bandgap principle, suitable for a wide temperature range, is proposed, in which the parabolic course of the temperature response curve of the reference voltage is linearized by process means available in the monolithic integration, dispensing with additional active components such as transistors or diodes. The precision voltage reference source includes two resistors (21, 22), which are represented by the N-doped emitter diffusion zone.