Electronically tunable dual-OTA second-order sinusoidal oscillators/filters with non-interacting controls: a systematic synthesis approach

Author

Tao, Yufei ; Fidler, J. Kel

Author_Institution

Dept. of Electron., York Univ., UK

Volume

47

Issue

2

fYear

2000

fDate

2/1/2000 12:00:00 AM

Firstpage

117

Lastpage

129

Abstract

In this paper a novel method of generating canonic sinusoidal oscillators with two operational transconductance amplifiers (OTAs), two grounded capacitors (GCs), and a small number of resistors is introduced. Noninteracting control of the frequency of oscillation (FO) and the condition of oscillation (CO) are realized with the transconductance parameters of the two OTAs respectively. Bandpass (BP) and lowpass (LP) filter functions can also be realized with the same topologies. The independent tuning of the natural frequency ω_o and ω_o/Q of most filters can be realized without changing the topologies

Keywords

active filters; band-pass filters; circuit tuning; low-pass filters; operational amplifiers; variable-frequency oscillators; bandpass filter functions; canonic sinusoidal oscillators; condition of oscillation; dual-OTA second-order sinusoidal oscillators; electronically tunable oscillators; frequency of oscillation; grounded capacitors; lowpass filter functions; natural frequency; noninteracting controls; operational transconductance amplifiers; systematic synthesis; transconductance parameters; Band pass filters; Capacitors; Circuit synthesis; Control system synthesis; Frequency; Operational amplifiers; Oscillators; Resistors; Topology; Transconductance;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/81.828566

Filename

828566