The stationary regime equations for a single-circuit feedback oscillator with additional unidirectional delay feedback channel are obtained by means of the harmonic balance method. Stability conditions of the different single-frequency oscillation conditions are analyzed and relations between the amplitude and frequency characteristics of the system and the system parameters are obtained by means of numerical methods. Theoretical results are confirmed in a highly qualitative manner by an experiment performed using an electro-acoustic feedback oscillator model with ultrasonic delay line.
Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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