Sigma delta modulator

US7423568B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wolfgang Hellwig · Hahnheim, DE
• Martin Wrede · Reutlingen, DE
• Gerhard Wucher · Reutlingen, DE
• Dirk Droste · Lörrach, DE
• Thomas Walker · Tübingen, DE

Key dates

• Filing date: May 31, 2005
• Grant date: Sep 9, 2008
• Expiry date: May 31, 2025

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M3/456
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A circuit for converting the capacitive signal change of a differential capacitor into digital signals, the circuit including a sigma delta modulator. The differential capacitor is a component of the signal feed structure and the reference feedback structure of the sigma delta modulator.