Author(s)

Nisha Walde^*, Syed Naseem Ahmad

Department of Electronics & Comm. Engineering, Jamia Millia Islamia, New Delhi, India.

The purpose of this paper is to introduce a new electronically controlled voltage mode sinusoidal oscillator (VMSO) using Voltage Differencing Transconductance Amplifiers (VDTA). The proposed circuit provides electronic control of ω₀ and independent condition of oscillation (CO). It is found that the oscillator works very satisfactorily and pure sinusoidal waveforms are available at the outputs. The PSPICE simulation confirms the theoretical results. The proposed oscillator circuit employs only two VDTAs, along with two grounded capacitor and single grounded resistor. The circuit exhibits low active and passive sensitivities for ω₀. Simulation results are obtained by using PSPICE software with TSMC CMOS 0.18 um process parameters.

Voltage Differencing Transconductance Amplifier (VDTA), Voltage-Mode Circuit, Oscillator

Walde, N. and Ahmad, S. (2015) New Voltage Mode Sinusoidal Oscillator Using Voltage Differencing Transconductance Amplifiers (VDTAs). Circuits and Systems, 6, 173-178. doi: 10.4236/cs.2015.68018.