An EMI susceptibility study of different integrated operational transconductance amplifiers

This paper presents a comparative EMI susceptibility study of different integrated operational transconductance amplifier (OTA) topologies. We analyzed conventional well-known amplifier topologies based on the Miller OTA and folded cascode concepts with lower power consumption. The output dc voltage...

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Bibliographic Details
Published inJournal of Electrical Engineering Vol. 74; no. 1; pp. 13 - 22
Main Authors Krolák, David, Horský, Pavel
Format Journal Article
LanguageEnglish
Published Bratislava Sciendo 01.02.2023
De Gruyter Poland
Subjects
Circuits
CMRR
common mode
Computer engineering
dc voltage shift
Electrical engineering
EMC
EMI
folded cascode
HF immunity
low power
Miller
open loop gain
Operational amplifiers
operational transconductance amplifier
OTA
Power consumption
Power supply
PSRR
Receivers & amplifiers
Topology
Transconductance
Transistors
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Summary:This paper presents a comparative EMI susceptibility study of different integrated operational transconductance amplifier (OTA) topologies. We analyzed conventional well-known amplifier topologies based on the Miller OTA and folded cascode concepts with lower power consumption. The output dc voltage shifts induced by power supply and input common mode high frequency disturbances are presented. On top of the EMI susceptibility comparison, we discuss PSRR and CMRR within large and small excitation signal with a new simulation setup. Even more, the back-gate connections of differential MOS pair in OTA input stage are investigated for EMI susceptibility impact as well.
ISSN:1339-309X
1335-3632
1339-309X
DOI:10.2478/jee-2023-0002