A low-noise/low-power preamplifier for capacitive microphones

Claus Erdmann Fürst

doi:10.1109/ISCAS.1996.539988

A low-noise/low-power preamplifier for capacitive microphones

Claus Erdmann Fürst

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Abstract

A design for a microphone preamplifier for application in hearing aids is presented. The amplifier operates at a supply of 1-1.5 V, the current drain is 40 μA. The maximum sound level allowed is more than 120 dB SPL (Sound Pressure Level), with a typical noise level of 25 dB(A) SPL (A-weighted). The amplifier is optimized for a capacitive microphone with a capacitance of 1.2 pF. The amplifier is fully integrated in a 0.7 μm n-well CMOS technology. Design details concerning noise performance are analytically described

Original language	English
Title of host publication	Proceedings of the IEEE International Symposium on Circuits and Systems : Connecting the World
Place of Publication	Piscataway
Publisher	IEEE
Publication date	1996
Pages	477-480
DOIs	https://doi.org/10.1109/ISCAS.1996.539988
Publication status	Published - 1996
Event	1996 IEEE International Symposium on Circuits and Systems - Atlanta, GA, United States Duration: 12 May 1996 → 15 May 1996 http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=3834

Conference

Conference	1996 IEEE International Symposium on Circuits and Systems
Country/Territory	United States
City	Atlanta, GA
Period	12/05/1996 → 15/05/1996
Internet address	http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=3834

Bibliographical note

Copyright 1996 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

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title = "A low-noise/low-power preamplifier for capacitive microphones",

abstract = "A design for a microphone preamplifier for application in hearing aids is presented. The amplifier operates at a supply of 1-1.5 V, the current drain is 40 μA. The maximum sound level allowed is more than 120 dB SPL (Sound Pressure Level), with a typical noise level of 25 dB(A) SPL (A-weighted). The amplifier is optimized for a capacitive microphone with a capacitance of 1.2 pF. The amplifier is fully integrated in a 0.7 μm n-well CMOS technology. Design details concerning noise performance are analytically described",

author = "F{\"u}rst, {Claus Erdmann}",

note = "Copyright 1996 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.; 1996 IEEE International Symposium on Circuits and Systems, ISCAS'96 ; Conference date: 12-05-1996 Through 15-05-1996",

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N1 - Copyright 1996 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

PY - 1996

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N2 - A design for a microphone preamplifier for application in hearing aids is presented. The amplifier operates at a supply of 1-1.5 V, the current drain is 40 μA. The maximum sound level allowed is more than 120 dB SPL (Sound Pressure Level), with a typical noise level of 25 dB(A) SPL (A-weighted). The amplifier is optimized for a capacitive microphone with a capacitance of 1.2 pF. The amplifier is fully integrated in a 0.7 μm n-well CMOS technology. Design details concerning noise performance are analytically described

AB - A design for a microphone preamplifier for application in hearing aids is presented. The amplifier operates at a supply of 1-1.5 V, the current drain is 40 μA. The maximum sound level allowed is more than 120 dB SPL (Sound Pressure Level), with a typical noise level of 25 dB(A) SPL (A-weighted). The amplifier is optimized for a capacitive microphone with a capacitance of 1.2 pF. The amplifier is fully integrated in a 0.7 μm n-well CMOS technology. Design details concerning noise performance are analytically described

U2 - 10.1109/ISCAS.1996.539988

DO - 10.1109/ISCAS.1996.539988

M3 - Article in proceedings

SP - 477

EP - 480

BT - Proceedings of the IEEE International Symposium on Circuits and Systems

PB - IEEE

CY - Piscataway

T2 - 1996 IEEE International Symposium on Circuits and Systems

Y2 - 12 May 1996 through 15 May 1996

ER -

A low-noise/low-power preamplifier for capacitive microphones

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Bibliographical note

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