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Upper bound on the rate of entropy increase accompanying noise power flow through linear systems

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1 Author(s)
M. S. Gupta ; Dept. of Electr. Eng. & Comput. Sci., Illinois Univ., Chicago, IL, USA

An upper bound is established for the rate of entropy increase due to noise power flow in a nonisothermal linear network containing n independent noise sources. The bound depends on the net power flows to (or from) the noise sources collectively, the lowest noise temperature in the network, and the efficiency of a Carnot heat engine operating between the highest and the lowest noise temperature occurring in a system. The author's example demonstrates that for a two port, the upper bound is actually reached and therefore a tighter bound cannot be found in general. Based on this example, a previously published bound is interpreted as the statement that the rate of entropy increase in the given n-port system cannot exceed that in a two port, in which the terminations are at the maximum and the minimum temperatures and the power flow equal the net value

Published in:

IEEE Transactions on Circuits and Systems  (Volume:35 ,  Issue: 9 )