Method and circuit arrangement for offset correction of a measurement bridge

US7075448B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Rasmus Rettig · Gerlingen, DE
• Emma Axten · Stuttgart, DE

Key dates

• Filing date: Aug 5, 2004
• Grant date: Jul 11, 2006
• Expiry date: Jan 19, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D3/021
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In the method and circuit arrangement for offset correction of the measurement bridge, the full bridge signal and half bridge signal of the measuring bridge are measured; a self-adjustment of the half bridge signal path to an output signal of the full bridge signal bath is performed to adjust the half bridge signal to the full bridge signal for each measurement cycle between turn on and turn off of the measurement bridge; and an offset value of the half bridge signal path is determined at a time of turning on and the offset value is kept constant during a given measurement cycle.