Table of Contents
VLSI Design
Volume 14, Issue 4, Pages 355-361
http://dx.doi.org/10.1080/10655140290011168

A Noise-shaping Accelerometer Interface Circuit for Two-chip Implementation

Electrical and Computer Engineering Department, 220 Owen Hall, Oregon State University, Corvallis, OR 97331-3211, USA

Received 1 May 2000; Revised 5 December 2000

Copyright © 2002 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper introduces a new architecture for sensor interface circuits using a delta–sigma modulator. The three-level force feedback allows the use of a digital compensator to stabilize the loop. A 3rd-order delta–sigma structure shapes the op-amp noise and allows a two-chip implementation with high loop gain at low frequencies.