An area efficient low noise 100 Hz low-pass filter

Christian Ølgaard; Haoues Sassene; Ivan R. Perch-Nielsen

doi:10.1109/ISCAS.1996.539883

An area efficient low noise 100 Hz low-pass filter

Christian Ølgaard, Haoues Sassene, Ivan R. Perch-Nielsen

Technical University of Denmark

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

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Abstract

A technique based on scaling a filter's capacitor currents to improve the noise performance of low frequency continuous-time filters is presented. Two 100 Hz low-pass filters have been implemented: a traditional low pass filter (as reference), and a filter utilizing the above mentioned current scaling technique. The two filters utilize approximately the same silicon area. The scaled filter implements the scaling by use of a MOS based current conveyor type CCII. Measurements indicate that the current scaled filter results in a noise improvement of approximately 5.5 dB over the reference filter when a class A/B biasing scheme is used in the current divider. Obtaining identical noise performance from the reference filter would require a 3.6 times larger filter capacitor. This would increase the reference filter's die area by 100%. Therefore, the current scaling technique allows filters with improved noise performance/dynamic range, given a fixed silicon area and a fixed power supply

Original language	English
Title of host publication	Proceedings of the IEEE International Symposium on Circuits and Systems
Volume	Volume 1
Publisher	IEEE
Publication date	1996
ISBN (Print)	07-80-33073-0
DOIs	https://doi.org/10.1109/ISCAS.1996.539883
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 = "An area efficient low noise 100 Hz low-pass filter",

abstract = "A technique based on scaling a filter's capacitor currents to improve the noise performance of low frequency continuous-time filters is presented. Two 100 Hz low-pass filters have been implemented: a traditional low pass filter (as reference), and a filter utilizing the above mentioned current scaling technique. The two filters utilize approximately the same silicon area. The scaled filter implements the scaling by use of a MOS based current conveyor type CCII. Measurements indicate that the current scaled filter results in a noise improvement of approximately 5.5 dB over the reference filter when a class A/B biasing scheme is used in the current divider. Obtaining identical noise performance from the reference filter would require a 3.6 times larger filter capacitor. This would increase the reference filter's die area by 100%. Therefore, the current scaling technique allows filters with improved noise performance/dynamic range, given a fixed silicon area and a fixed power supply",

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AU - Ølgaard, Christian

AU - Sassene, Haoues

AU - Perch-Nielsen, Ivan R.

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

Y1 - 1996

N2 - A technique based on scaling a filter's capacitor currents to improve the noise performance of low frequency continuous-time filters is presented. Two 100 Hz low-pass filters have been implemented: a traditional low pass filter (as reference), and a filter utilizing the above mentioned current scaling technique. The two filters utilize approximately the same silicon area. The scaled filter implements the scaling by use of a MOS based current conveyor type CCII. Measurements indicate that the current scaled filter results in a noise improvement of approximately 5.5 dB over the reference filter when a class A/B biasing scheme is used in the current divider. Obtaining identical noise performance from the reference filter would require a 3.6 times larger filter capacitor. This would increase the reference filter's die area by 100%. Therefore, the current scaling technique allows filters with improved noise performance/dynamic range, given a fixed silicon area and a fixed power supply

AB - A technique based on scaling a filter's capacitor currents to improve the noise performance of low frequency continuous-time filters is presented. Two 100 Hz low-pass filters have been implemented: a traditional low pass filter (as reference), and a filter utilizing the above mentioned current scaling technique. The two filters utilize approximately the same silicon area. The scaled filter implements the scaling by use of a MOS based current conveyor type CCII. Measurements indicate that the current scaled filter results in a noise improvement of approximately 5.5 dB over the reference filter when a class A/B biasing scheme is used in the current divider. Obtaining identical noise performance from the reference filter would require a 3.6 times larger filter capacitor. This would increase the reference filter's die area by 100%. Therefore, the current scaling technique allows filters with improved noise performance/dynamic range, given a fixed silicon area and a fixed power supply

U2 - 10.1109/ISCAS.1996.539883

DO - 10.1109/ISCAS.1996.539883

M3 - Article in proceedings

SN - 07-80-33073-0

VL - Volume 1

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

PB - IEEE

T2 - 1996 IEEE International Symposium on Circuits and Systems

Y2 - 12 May 1996 through 15 May 1996

ER -

An area efficient low noise 100 Hz low-pass filter

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