Electronically Controllable Fully-Uncoupled Explicit Current-Mode Quadrature Oscillator Using VDTAs and Grounded Capacitors

Dinesh Prasad, Mayank Srivastava, Data Ram Bhaskar

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.

DOI: 10.4236/cs.2013.42023                

Abstract

An electronically controllable fully uncoupled explicit current-mode quadrature oscillator employing Voltage Differencing Transconductance Amplifiers (VDTAs) as active elements has been presented. The proposed configuration employs two VDTAs along with grounded capacitors and offers the following advantageous features 1) fully and electronically 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.

Keywords

VDTA; Quadrature Oscillator; Current-Mode Circuits

Conflicts of Interest

The authors declare no conflicts of interest.

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