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HIGH INPUT AND LOW OUTPUT IMPEDANCE VOLTAGE-MODE LOWPASS, BANDPASS, AND HIGHPASS ACTIVE-R FILTER

NISAR AHMED SHAH

Department of Electronics and Instrumentation Technology, The University of Kashmir, Srinagar 190 006, India

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and

MOHAMMAD FAROOQ RATHER

Department of Electronics and Instrumentation Technology, The University of Kashmir, Srinagar 190 006, India

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https://doi.org/10.1142/S0218126606003313Cited by:1 (Source: Crossref)

Abstract

A novel filtering topology with a single input and three outputs (SITO) employing a single four-terminal current feedback amplifier (CFA) with an external compensation pin, such as AD844, two operational amplifiers (OAs), and as many resistors is presented. The circuit offers the features of simultaneous realization of lowpass (LP), bandpass (BP), and highpass (HP) filtering functions, free from component matching conditions, cascadability due to high input and low output impedances, orthogonal/independent adjustment of the filtering parameters, and low active and passive sensitivities. PSPICE simulation results are included to confirm the theoretical results.

Keywords:

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