Quantum noise minimization in transistor amplifiers.
General quantum restrictions on the noise performance of linear transistor amplifiers are used to identify the region in parameter space where the quantum-limited performance is achievable and to construct a practical procedure for approaching it experimentally using only the knowledge of directly measurable quantities: the gain, (differential) conductance, and the output noise. A specific example of resonant barrier transistors is discussed.
Gavish
U
U
Institute for Theoretical Physics, University of Innsbruck, Innsbruck A-6020, Austria.
Yurke
B
B
Imry
Y
Y