Electronically Tunable Quadrature Oscillator Employing Single Differential Difference Transconductance Amplifier

Abstract

In this paper, we present new voltage mode quadrature oscillator, employing single differential difference transconductance amplifier. The proposed oscillator structure consists of two grounded capacitors and a single resistor. The use of grounded capacitors is particularly attractive for integrated circuit implementation. In this way, the frequency of oscillations can be controlled by the biasing current of transconductance stage. Simulation results agree quite well with the theoretical analysis.