The generation of microwave frequencies by the heterostructure hot-electron diode (H/sup 2/ED) is discussed. At 77 K, self-oscillation has been produced over a broad frequency range from direct current to 10.5 GHz, limited by the parasitic series resistance and capacitance. Considerations of the bias polarity required to produce oscillations and of their high-frequency response support a model of switching from tunneling to thermionic emission.>
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Kolodzey et al. (1988) studied this question.
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