VERY HIGH FREQUENCY CRYSTAL OSCILLATOR CIRCUITS 3rd Quarterly Progress Report Signal Corps Contract No.DA-36-039-sc-64609

摘要

Experimental and analytical results of Grounded Grid and Cathode Coupled crystal oscillators operating at 120, 135, and 150 megacycles are reported, completing a preliminary investigation of oscillator operation in the frequency range of 75 to 150 megacycles. Evaluation and comparison of the circuits are made with respect to specific parameters, which include poser output, crystal driving power, power ratios, operating frequency and stability. Careful attention is paid to experimental data in view of applying this information to the development of a design method for oscillators operating in the desired frequency range. A discussion and analysis is made of the effects on circuit performance of plate tank detuning and variations in the Q of the tank inductance. Methods of crystal parameter measurements are included. The effect on operating frequency of using a shunt compensating inductance across the crystal unit is discussed, and equations for loop gain and stability are presented.