Efficient reduction of electromagnetic interference effects in operational amplifiers

Computer simulation; Low pass filters; Mathematical techniques; Operational amplifiers; Topology; DC offsets; Input differential pairs; Pair compensation topology; Signal interference

Abstract :

[en] When subjected to electromagnetic interference, an operational amplifier will generate a DC offset. A thorough comparison between two approaches to reduce this offset is presented. Through mathematical deduction and simulations, it is shown that placing a lowpass filter at the input differential pair is superior to a double differential pair compensation topology. © The Institution of Engineering and Technology 2007.

Disciplines :

Electrical & electronics engineering

Author, co-author :

Walravens, C.; K.U. Leuven, Department of Electrical Engineering - MICAS, Kasteelpark Arenberg, Heverlee (Leuven), Belgium

Van Winckel, S.; K.U. Leuven, Department of Electrical Engineering - MICAS, Kasteelpark Arenberg, Heverlee (Leuven), Belgium

Redouté, Jean-Michel ; Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Systèmes microélectroniques intégrés

Steyaert, M.; K.U. Leuven, Department of Electrical Engineering - MICAS, Kasteelpark Arenberg, Heverlee (Leuven), Belgium

Language :

English

Title :

Efficient reduction of electromagnetic interference effects in operational amplifiers

Publication date :

2007

Journal title :

Electronics Letters

ISSN :

0013-5194

eISSN :

1350-911X

Publisher :

Institute of Electrical Engineers, United Kingdom

Volume :

Issue :

Pages :

84-85

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 04 November 2018

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Bibliography

Abuelma'attit, M.T.: ' Analysis of the effect of radio frequency interference on the DC performance of CMOS operational amplifiers ', Analog integrated circuits and signal processing, (Springer, The Netherlands, 2005), 45, p. 123-130
Fiori, F.: ' Operational amplifier stage robust to EMI ', Electron. Lett., 2001, 37, p. 930-931 10.1049/el:20010651 0013-5194
Sansen, W.: ' Analog design essentials ', (Springer Verlag, 2006)
Fiori, F., and Crovetti, P.S.: ' Nonlinear effects of radio-frequency interference in operational amplifiers ', IEEE Trans. Circuits Syst. I, Fundam. Theory Appl., 2002, 49, p. 367-372 10.1109/81.989173 1057-7122