Active filter design using operational transconductance amplifiers: A tutorial

Author

Geiger, Randall L. ; Sânchez-Sinencio, Edgar

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

1

Issue

2

fYear

1985

fDate

3/1/1985 12:00:00 AM

Firstpage

20

Lastpage

32

Abstract

Basic properties of the operational transconductance amplifier (OTA) are discussed. Applications of the OTA in voltage-controlled amplifiers, filters, and impedances are presented. A versatile family of voltage-controlled filter sections suitable for systematic design requirements is described. The total number of components used in these circuits is small, and the design equations and voltage-control characteristics are attractive. Limitations as well as practical considerations of OTA-based filters using commercially available bipolar OTAs are discussed. Applications of OTAs in continuous-time monolithic filters are considered.

Keywords

active filters; active networks; operational amplifiers; active filter design; commercial bipolar OTA; continuous-time monolithic filters; first order structures; impedances; operational transconductance amplifiers; second-order structures; voltage-controlled amplifiers; Active filters; Gain; Impedance; Operational amplifiers; Resistors; Transconductance; Voltage control;

fLanguage

English

Journal_Title

Circuits and Devices Magazine, IEEE

Publisher

ieee

ISSN

8755-3996

Type

jour

DOI

10.1109/MCD.1985.6311946

Filename

6311946