On the effect of amplitude modulated EMI injected on a PLL active filter

Author

Dubois, T. ; Laurin, J.-J. ; Raoult, J. ; Jarrix, S.

Author_Institution

Poly-Grames Res. Center, Ecole Polytech., Montreal, QC, Canada

fYear

2011

fDate

6-9 Nov. 2011

Firstpage

170

Lastpage

175

Abstract

In this paper, the effect of an Electromagnetic Interference (EMI) modulated in amplitude on an Operational Amplifier (Op. Amp.), first as a standalone circuit and then integrated in a microwave Phase-Locked Loop (PLL) is studied. In both cases, the EMI is injected through a magnetic near field probe. First, a CW sinusoidal EMI is injected on the input tracks of the Op. Amp. alone in order to determine resonance frequencies. Then, these resonance frequencies are used as carriers to inject amplitude modulated EMI. Then, the Op. Amp. is integrated into a PLL. The susceptibility of the PLL when an EMI modulated in amplitude is injected on the Op. Amp. is carried out. Parameters of the modulated signal leading to the most sensitive perturbation effects are presented.

Keywords

active filters; electromagnetic interference; microwave amplifiers; operational amplifiers; phase locked loops; EMI; OpAmp; PLL; active filter; electromagnetic interference; microwave phase-locked loop; operational amplifier; Electromagnetic interference; Frequency measurement; Frequency modulation; Phase locked loops; Probes; Resonant frequency; Voltage-controlled oscillators; EMI; Op. Amp.; PLL; demodulation; near field probe; phase modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility of Integrated Circuits (EMC Compo), 2011 8th Workshop on

Conference_Location

Dubrovnik

Print_ISBN

978-1-4577-0862-6

Type

conf

Filename

6130058