LOW-VOLTAGE LOW-POWER CONTROLLABLE PREAMPLIFIER FOR ELECTRET MICROPHONES

被引：10

作者：

VANDERWOERD, AC

SERDIJN, WA

机构：

[1] The Electronics Research Laboratory, Delft University of Technology

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 1993年 / 28卷 / 10期

关键词：

Control equipment - Electrets - Harmonic analysis - Linear integrated circuits - Microphones - Signal distortion;

D O I：

10.1109/4.237521

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 low-voltage low-power analog controllable preamplifier for electret microphones is presented. It has been designed for a single supply voltage of 1.0 V, whereas its average power consumption amounts to some tens of microwatts. A de current controls its gain directly into decibels. The design meets specifications (listed in Section I) concerning accuracy, bandwidth, noise properties, etc., suitable for most applications in portable telephone equipment, portable transceivers, hearing aids, etc. Much attention has been paid to the dynamic range of the input signal, noise, and offset properties. The circuit has been realized in a semi-custom IC process. Simulation and measurement data of the most important properties are presented.

引用

页码：1052 / 1055

页数：4