Reduction of Electromagnetic Interference Susceptibility in Small-Signal Analog Circuits Using Complementary Split-Ring Resonators

Low-frequency analog and digital electronic circuits are susceptible to electromagnetic interference in the radiofrequency (RF) range. This disturbance is produced when the coupled RF signal is rectified by the nonlinear behavior of the semiconductors used in the small-signal analog input stage of t...

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Bibliographic Details
Published in:IEEE transactions on components, packaging, and manufacturing technology (2011) packaging, and manufacturing technology (2011), 2012-02, Vol.2 (2), p.240-247
Main Authors: Perez, D., Gil, I., Gago, J., Fernandez-Garcia, R., Balcells, J., Gonzalez, D., Berbel, N., Mon, J.
Format: Article
Language:English
Subjects:
Amplifiers
Analog circuits
Applied sciences
Circuit properties
Circuits
Complementary split-ring resonator
Couplings
Demodulation
Digital circuits
Electric, optical and optoelectronic circuits
Electromagnetic interference
Electronic circuits
Electronics
Exact sciences and technology
Frequency modulation
Integrated circuit modeling
Metamaterials
Nonlinearity
operational amplifier
Oscillators, resonators, synthetizers
Printed circuit boards
Radio frequencies
Resonant frequency
Resonators
Semiconductors
Studies
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Summary:Low-frequency analog and digital electronic circuits are susceptible to electromagnetic interference in the radiofrequency (RF) range. This disturbance is produced when the coupled RF signal is rectified by the nonlinear behavior of the semiconductors used in the small-signal analog input stage of the electronic system. Circuits based on operational amplifiers are usually employed for such input stages. These circuits present an amplitude modulation demodulation produced by the nonlinearity of internal transistors. Such a phenomenon generates demodulated signals in the low-frequency range. In this paper, this effect is suppressed by combining the conventional printed circuit board layout with complementary split-ring resonators (CSRRs). CSRRs are constitutive elements for the synthesis of metamaterials with negative effective permittivity, which are mainly excited to the host line by means of electric coupling. Electromagnetic simulations and experimental results show an effective rejection of the undesired RF demodulation effect with no extra cost in terms of the device area or manufacturing process.
ISSN:2156-3950
2156-3985
DOI:10.1109/TCPMT.2011.2172442