RESEARCH WORK FOR FREQUENCY TEMPERATURE COMPENSATION TECHNIQUES FOR QUARTZ CRYSTAL OSCILLATORS.

摘要

The different methods of frequency-temperature compensation (varicap,transistor and isolation stage, binistor,and capacitor-diode) are discussed. New techniques and approaches to compensation of crystal oscillators are presented,and mathematical analyses are developed for each. Empirical data is presented indicating the characteristics of each compensation method. A method of obtaining negligible effect of B+voltage changes is presented. Several new approaches to voltage control/networks are discussed,including a bridge voltage and current control/network that is applicable to both the varicap and capacitor-diode method. Aging data on four oscillators is presented which is a continuation of the aging tests started during the first quarter of this contract. The aging oscillators were temperature cycled and the original frequency-temperature characteristics were compared to the characteristics obtained. (Author)