On-Chip Active Filter for Electrocardiographic Signals Through CMOS Pseudo Resistors

This brief describes the conception, analysis, and design of a 20.89-hertz band-pass front-end analog filter tailored for biopotential signals. The principle of operation considers the integration of active circuits exhibiting large time-constant networks by CMOS pseudo resistances. A strategic loca...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Vol. 72; no. 7; pp. 883 - 887
Main Author: Gonzalez-Diaz, Victor R. Gonzalez
Format: Journal Article
Language:English
Published: New York IEEE 01.07.2025
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Analog filter
Analogue filters
Artificial intelligence
Band-pass filters
Bandpass filters
Bandwidth
biopotential
Capacitance
Circuits
CMOS
electrocardiographic
Figure of merit
Filtering
Integrated circuits
low-transconductance
MOS devices
pseudo resistance
Resistors
Transconductance
Transistors
ISSN:1549-7747, 1558-3791
Online Access:Get full text
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Description
Summary:This brief describes the conception, analysis, and design of a 20.89-hertz band-pass front-end analog filter tailored for biopotential signals. The principle of operation considers the integration of active circuits exhibiting large time-constant networks by CMOS pseudo resistances. A strategic location of these pseudo resistances enables the filter to achieve the corresponding design specifications with no external capacitors. The experimental results with a CMOS 180 nanometer integrated circuit prototype achieve a competitive Figure of Merit in a 0.06 square millimeters area, exhibiting advantages in area and system performance.
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ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2025.3574263