A method of Analysis of Fundamental and Overtone Crystal-Oscillator Circuits

An analysis is given of the behaviour of some crystal-oscillator circuits with the aim of finding the most favourable working conditions and the limiting conditions for oscillation. These questions are of special interest at very high frequencies, where overtone oscillators are becoming more and more important. Some overtone circuits are described, and a few problems affecting frequency stability are discussed. A simple and accurate method of measuring the parameters of the crystal equivalent circuit is also described.