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Title: Multiple-input-multiple-output log-domain universal biquad filter
Authors: Shah, N A
Khanday, F A
Keywords: Analog circuits
Circuit synthesis
Integrated circuits
Signal Processing
Continuous-time filters
Multifunction active filters
Companding filters
Log-Domain filters
Issue Date: Dec-2012
Publisher: NISCAIR-CSIR, India
Abstract: A simple log-domain technique based Multiple-Input-Multiple-Output (MIMO) universal biquad realizing simultaneously all the standard filtering functions viz; Lowpass (LP), Highpass (HP), Bandpass (BP), Bandstop (BS), and Allpass (AP) is presented in this paper. The biquad being designed by log-domain technique offers all its advantages. The circuit besides permitting independent electronic adjustment of pole frequency (ω<sub><span style="mso-bidi-font-style: italic">o</span></sub>) and the Quality factor (<i>Q</i><span style="mso-bidi-font-style: italic">) is: simultaneously Single-Input-Multiple-Output (SIMO) and Multiple-Input-Single-Output (MISO), free from matching conditions, capable of absorbing the shunt parasitic capacitances, amenable for monolithic integration, composed of merely a few exponential transconductor cells and grounded elements. The other features of circuit are its low sensitivity and good linearity. Simulated and experimental results are obtained to prove the theoretical analyses. </span>
Description: 928-934
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.50(12) [December 2012]

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