Abstract
A simple noise model for bipolar transistors is adapted to the superconducting base semiconductor isolated transistor (SUBSIT). The model includes two statistically independent shot noise current sources in a lumped element model. For the case where the emitter of the SUBSIT is a normal metal, it is shown that the bipolar model carries over intact. For a SUBSIT with a superconducting emitter as well as base, the noise performance improves tremendously, due to the sharper turn-on characteristic. Noise temperatures in the milli-Kelvin regime are possible, and the energy resolution is likely to be quantum-limited. >
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