Programmable OTA‐Based Multifunction Active Filter | Zendy

Abdulrahman Khalaf Al-Ali | Zendy; Muhammad Taher Abuelma′atti | Zendy; Rizwan Ali Tiwana | Zendy

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Programmable OTA‐Based Multifunction Active Filter

Author(s) -

Abdulrahman Khalaf Al-Ali,

Muhammad Taher Abuelma′atti,

Rizwan Ali Tiwana

Publication year - 1994

Publication title -

active and passive electronic components

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.144

H-Index - 22

eISSN - 1026-7034

pISSN - 0882-7516

DOI - 10.1155/1994/10413

Subject(s) - electronic engineering , filter (signal processing) , active filter , voltage controlled filter , transconductance , operational transconductance amplifier , low pass filter , amplifier , electronic filter , operational amplifier , computer science , transfer function , high pass filter , filter design , cutoff frequency , capacitor , rc circuit , engineering , electrical engineering , cmos , voltage , transistor

A fully programmable multifunction filter is presented. The filter uses four operational transconductanceamplifiers and two capacitors. Analog switches are used to control the filter transfer function througha microcontroller. The user is provided control over the cutoff (or centre) frequency of the filter bycontrolling the auxiliary bias currents of the operational transconductance amplifiers via digital-to-analogconverters. The circuit can simultaneously provide three programmable transfer functions in asingle structure and can realize all the standard second-order filters. The circuit is attractive for VLSIimplementation

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