Three-phase, voltage controlled sinusoidal oscillator

Abstract

A method allowing the making of any multiphase, voltage-controlled, sinusoidal signal generator is presented. To prove its feasibility, a three-phase, voltage controlled, sine wave signal generator was built. The differences between the three phase sine waves are kept precisely at 120° and a perfect matching of the signal magnitudes is obtained whatever the frequency value. A very low distortion rate and a wide frequency range can be obtained. The described circuit is particularly attractive to build low or ultralow frequency multiphase sinusoidal oscillators.