High spectral quality sinusoidal oscillator with energy based amplitude control

Abstract

This paper presents a high spectral quality voltage-controlled sinusoidal quadrature oscillator. The amplitude stabilization of the output signal is based on energy approach. Described voltage-controlled oscillator has potential applications phase locked loops in modulation, detection etc. Most of the sinusoidal oscillators available in open literature are suffering with same problem. The amplitude stabilization is based on output saturation or simple nonlinear circuit which leads to sine wave distortion and therefore generation of spurious spectral lines. So this paper describes new principle of amplitude stabilization based on energy approach and verifies the results by simulation.