A. Solutions to the Problem of the Optimum Noise Performance of Multiterminal Amplifiers
نویسندگان
چکیده
The research on noise in electron devices has two objectives: (i) The study of specific devices, such as the parametric amplifier and the maser, to determine the physical sources of noise and the limitations they impose on the noise performance of the amplifier. The parametric amplifier with coherent input signals at both the signal and idler frequency, and the degenerate parametric amplifier are the impetus for the second objective. (ii) The determination of a measure of the optimum noise performance of multiterminal linear amplifiers. The optimum noise performance of a linear twoport amplifier is known to be expressible in terms of its minimum noise measure, a quantity that is characteristic of the amplifier. The optimum noise performance of a multiterminal pair amplifier excited by a multiterminal pair source is at present under study for the purpose of devoloping an analogous measure for the optimum noise performance of such an amplifier. H. A. Haus, P. Penfield, Jr., R. P. Rafuse
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