A High-Resolution Lowpass Sigma-Delta Modulator Applied in Micro-Gyroscope-Reference-Cited by-同舟云学术

A High-Resolution Lowpass Sigma-Delta Modulator Applied in Micro-Gyroscope

Published:2014-04 Issue: Volume:609-610 Page:964-967
ISSN:1662-9795
Container-title:Key Engineering Materials
language:
Short-container-title:KEM

Author:

Zhou Jia Jun¹,Wang Di¹,Zhao Ying Kai¹,Xu Hong Lin¹,Liu Xiao Wei¹

Affiliation:

1. Harbin Institute of Technology

Abstract

In this paper, in order to enhance resolution and guarantee the stability of the micro-gyroscope, a high-resolution lowpass sigma-delta modulator is proposed. It employs single-loop fourth-order and full differential structure. The simulated result on the Simulink platform shows that the SNDR is 105.4dB and the effective number of bits (ENOB) is 17.22bits. The entire circuits are implemented with 0.5μm CMOS process. The simulated result on Cadence shows that the SNDR is 99.7dB. The modulator operates at a sampling frequency of 25.6MHz and the signal bandwidth is 100kHz with 128 oversampling ratio (OSR). The dynamic range (DR) is 120 dB approximately and the SNDR changes linearly with the input level.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.scientific.net/KEM.609-610.964.pdf

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