TRANSISTOR DEVICES CONFIGURED TO OPERATE ABOVE A FIRST CUTOFF FREQUENCY

摘要

Transistor devices are provided configured to operate at frequencies above a typical first cutoff frequency. In one aspect, a method Ls provided for configuring a transistor device to operate above a first cutoff frequency. The method comprises selecting a desired operating frequency range and a desired output power for a transistor associated with the transistor device, analyzing the effects of phase velocity mismatch on the overall gain of a plurality of different sized transistors, and evaluating the primary and secondary gain regions of the plurality of different sized transistors, The method further comprises selecting a transistor sized to provide the desired output power at or close Io the desired operating frequency range based on the analysis of the phase velocity mismatch and the evaluation of the primary and secondary gain regions.