A MICROPOWER-COMPATIBLE TIME-MULTIPLEXED SC SPEECH SPECTRUM ANALYZER DESIGN

被引：23

作者：

CHANG, JS ^{[1
]}

TONG, YC ^{[1
]}

机构：

[1] UNIV MELBOURNE,DEPT OTOLARYNGOL,HUMAN COMMUN RES CTR,MELBOURNE,VIC 3002,AUSTRALIA

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 1993年 / 28卷 / 01期

基金：

英国医学研究理事会; 美国国家卫生研究院;

关键词：

D O I：

10.1109/4.179201

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A micropower-compatible time-multiplexed SC speech spectrum analyzer embodying several new design methodologies is described. In the bandpass filter (BPF) section, the dc offset differences between channels are reduced by a careful biquadratic filter design, and a capacitor sharing technique is employed to reduce chip area. A new time-multiplexed full-wave rectifier (FWR) is also proposed. Expressions for the errors that limit the accuracy of the running spectrum due to nonidealities are formulated. An experimental four-channel spectrum analyzer has been fabricated and measurements from prototypes showed that the proposed design methodologies are satisfactory in achieving the design specifications.

引用

页码：40 / 48

页数：9

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