Smallsignal analysis ofresonant tunnel diodes inthebistable mode
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Thesmallsignal impedance ofGaAs/Al(Ga)As double-barrier resonanttunnel diodeshasbeenmeasured andanalyzed over a widerangeoffrequencies andfor various d.c.biasvalues.The RTD equivalent circuit elements were obtained by measuring theimpedance inthebistable region. Thecut-off frequency andthe self-resonant frequency were calculated andcompared withdirect measurements.