TY - JOUR
T1 - High frequency amplification in quantum well oscillators
AU - Jogai, B.
AU - Wang, K. L.
AU - Brown, K. W.
N1 - Funding Information:
Acknowledgement-This work is in part supported by the office of Naval Research and the Army Research office. K.W. Brown acknowledges the support of Aerospace Sponsored Research Funds.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1986
Y1 - 1986
N2 - We have calculated the frequency limit of negative differential resistance and a.c. amplification of quantum well oscillators. From the time development of resonant tunneling, negative resistance is expected to occur at very high frequencies. However, the large device impedance results in a resistive cut-off frequency that is several orders of magnitude below that predicted from transit time considerations. This cut-off frequency is estimated from an equivalent circuit model, and the power of an oscillator as a function of frequency and negative resistance is found from a transmission line model.
AB - We have calculated the frequency limit of negative differential resistance and a.c. amplification of quantum well oscillators. From the time development of resonant tunneling, negative resistance is expected to occur at very high frequencies. However, the large device impedance results in a resistive cut-off frequency that is several orders of magnitude below that predicted from transit time considerations. This cut-off frequency is estimated from an equivalent circuit model, and the power of an oscillator as a function of frequency and negative resistance is found from a transmission line model.
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U2 - 10.1016/0749-6036(86)90029-7
DO - 10.1016/0749-6036(86)90029-7
M3 - Article
AN - SCOPUS:0022603402
VL - 2
SP - 259
EP - 265
JO - Superlattices and Microstructures
JF - Superlattices and Microstructures
SN - 0749-6036
IS - 3
ER -