Summary
International Technical Conference on Circuits/Systems, Computers and Communications
2008
Session Number:P2
Session:
Number:P2-1
Electronically Tunable Multiple-Mode Biquadratic Circuit Employing OTAs and Grounded Capacitors
Hiroki Kawakami, Takao Tsukutani, Noboru Yabuki, Yasuaki Sumi,
pp.-
Publication Date:2008/7/7
Online ISSN:2188-5079
Summary:
This paper introduces an electronically tunable multiple-mode biquadratic circuit employing operational transconductance amplifiers (OTAs) and grounded capacitors. The basic circuit configuration is obtained from a second-order integrator loop structure consisting of loss-less and lossy integrators. The multiple-mode biquadratic circuit can realize low-pass, band-pass, high-pass, band-stop and all-pass transfer functions by suitably choosing the current output terminals. Additionally, the circuit parameters ?0, Q and H can be set orthogonally through adjusting the bias currents of the OTAs. The biquadratic circuits enjoy very low sensitivities with respect to the circuit components. Some examples are given together with simulated results by PSPICE.