Computer Simulation of Anomalous-Mode Oscillation in Silicon Avalanche Diodes (Correspondence)

Computer simulations of the free-running oscillation of an avalanche diode inserted at one end of a multifrequency coaxial-line resonator are presented. The obtained transient behaviors indicate that for triggering of the anomalous-mode oscillation, a large-signal IMPATT-mode oscillation is not always necessary. The waveform of the anomalous mode under steady-state conditions can be constructed by the superposition of a sawtooth and a positive spike waveform.