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A Generic EMI-Immune Technique for Differential Amplifiers With Single-Ended Output.

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Title: A Generic EMI-Immune Technique for Differential Amplifiers With Single-Ended Output.
Authors: Pudi N S, Anjan Kumar1, Redoute, Jean-Michel2, Baghini, Maryam Shojaei3
Source: IEEE Transactions on Electromagnetic Compatibility. Aug2018, Vol. 60 Issue 4, p958-964. 7p.
Subjects: Differential amplifiers, Immunity testing (Electronics), Electromagnetic interference, Electric capacity, Mathematical analysis, Logic circuits
Abstract: This paper presents a unique methodology to calculate the filtering capacitances of the OpAmp already reported in the literature. The methodology aims to show that there is an optimal solution that can be used to increase the electromagnetic interference (EMI) immunity of any OpAmp for a wide range of frequencies. By using this proposed methodology, an OpAmp structure that reduces the EMI effect is designed in standard 0.18\ \mu \textm mixed-mode CMOS technology. Detailed mathematical analyses and simulation results are presented and discussed. Simulation results show that the maximum EMI-induced offset voltage in the frequency range from 1 MHz to 1 GHz for the OpAmp is 4.4 mV. In contrast, the standard Miller OpAmp exhibits a maximum EMI-induced offset voltage of 92.4 mV under the same operating conditions. [ABSTRACT FROM PUBLISHER]
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Database: Engineering Source
Description
Abstract:This paper presents a unique methodology to calculate the filtering capacitances of the OpAmp already reported in the literature. The methodology aims to show that there is an optimal solution that can be used to increase the electromagnetic interference (EMI) immunity of any OpAmp for a wide range of frequencies. By using this proposed methodology, an OpAmp structure that reduces the EMI effect is designed in standard 0.18\ \mu \textm mixed-mode CMOS technology. Detailed mathematical analyses and simulation results are presented and discussed. Simulation results show that the maximum EMI-induced offset voltage in the frequency range from 1 MHz to 1 GHz for the OpAmp is 4.4 mV. In contrast, the standard Miller OpAmp exhibits a maximum EMI-induced offset voltage of 92.4 mV under the same operating conditions. [ABSTRACT FROM PUBLISHER]
ISSN:00189375
DOI:10.1109/TEMC.2017.2759785