Analysis and synthesis of high-frequency bipolar-transistor oscillators

Several star-type circuit designs of high-frequency oscillators constructed on the basis of bipolar transistors are analyzed. The oscillator parameters are optimized by the criteria of providing the local steady-state isosynchronism and the maximum regeneration in the self-excitation mode. A constraint on the oscillator parameters is introduced into the oscillator synthesis technique in order to take into account the deleterious effect of higher-order harmonics of the collector current on the steady-state characteristics. Various oscillator circuit designs are compared.