Volume 14, Issue 4 132807 pp. 355-361
Article
Open Access

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

Tetsuya Kajita

Tetsuya Kajita

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

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Un-Ku Moon

Un-Ku Moon

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

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Gabor C. Temes

Corresponding Author

Gabor C. Temes

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

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First published: 05 December 2000

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.

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