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IJPAP Vol.50(12) [December 2012] >

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 (ωo) and the Quality factor (Q) 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.
Page(s): 928-934
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.50(12) [December 2012]

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