Active-RC filters using two-stage OTAs with and without feed-forward compensation

D. V. Kamat, P. V. Ananda Mohan, K. Gopalakrishna Prabhu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this study, the design of active-RC filters using opamps with and without feed-forward-compensation is considered. Accurate analysis of the passive compensation scheme suggested in literature for lossless and lossy integrators using feed-forward-compensated opamps is carried out. The compensation for the lossy and lossless integrators using negative impedance converter for active filters using two cascaded gms in place of opamps is explored. Novel building blocks for realising the negative capacitance needed for exact compensation are proposed. To study the efficacy of the proposed compensation technique, a two-integrator loop biquad is considered. The PSPICE simulation results of Tow-Thomas biquad are presented to highlight the performance improvement obtained using the proposed compensation techniques.

Original languageEnglish
Pages (from-to)527-535
Number of pages9
JournalIET Circuits, Devices and Systems
Volume5
Issue number6
DOIs
Publication statusPublished - 11-2011

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Operational amplifiers
Negative impedance converters
Active filters
SPICE
Compensation and Redress
Capacitance

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

Kamat, D. V. ; Ananda Mohan, P. V. ; Gopalakrishna Prabhu, K. / Active-RC filters using two-stage OTAs with and without feed-forward compensation. In: IET Circuits, Devices and Systems. 2011 ; Vol. 5, No. 6. pp. 527-535.
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Active-RC filters using two-stage OTAs with and without feed-forward compensation. / Kamat, D. V.; Ananda Mohan, P. V.; Gopalakrishna Prabhu, K.

In: IET Circuits, Devices and Systems, Vol. 5, No. 6, 11.2011, p. 527-535.

Research output: Contribution to journalArticle

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