Title :
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
fDate :
2/1/2000 12:00:00 AM
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 ωo and ωo/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;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
