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Electronically Controllable Fully-Uncoupled Explicit Current-Mode Quadrature Oscillator Using VDTAs and Grounded Capacitors
Department of Electronics and Communication Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia, New Delhi, India
Department of Electronics and Communication Engineering, Amity School of Engineering and Technology, Amity University, Noida, India
Department of Electronics and Communication Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia, New Delhi, India
- 1 Department of Electronics and Communication Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia, New Delhi, India
- 2 Department of Electronics and Communication Engineering, Amity School of Engineering and Technology, Amity University, Noida, India
- 3 Department of Electronics and Communication Engineering, Faculty of Engineering and Technology, Jamia Millia Islamia, New Delhi, India
Circuits and Systems·Volume 04 (2013)·Pages 169–172·Published 17 April 2013·DOI10.4236/cs.2013.42023
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Abstract
An electronically controllable fully uncoupled explicit current-mode quadrature oscillator employing Voltage Differ encing Transconductance Amplifiers (VDTAs) as active elements has been presented. The proposed configuration em ploys two VDTAs along with grounded capacitors and offers the following advantageous features 1 ) fully and elec tronically independent control of condition of oscillation (CO) and frequency of oscillation (FO) ; 2 ) explicit current- mode quadrature oscillations ; and 3 ) low active and passive sensitivities. The workability of proposed configuration has been demonstrated by PSPICE simulations with TSMC CMOS 0.18 μm process parameters.
KeywordsVDTAQuadrature OscillatorCurrent-Mode Circuits
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