Op. Paixao et Ak. Jastrzebski, ANALYSIS AND SENSITIVITIES OF NOISY NETWORKS USING NODAL APPROACH, IEEE transactions on microwave theory and techniques, 42(7), 1994, pp. 1254-1260
An enhancement of nodal noise analysis of electrical networks is prese
nted by computing noise sensitivities with respect to network paramete
rs. The noise figure and spot noise parameters sensitivities of the re
duced two-port network are obtained from the partial inversion of the
nodal admittance matrix. Analytical formulas are derived to calculate
first- and second-order noise sensitivities directly, rather than usin
g a computer-time intensive perturbation method. Expressions for noise
sensitivities of cascaded networks are also given. Numerical results
for an actively matched amplifier are shown to illustrate the advantag
es of the proposed technique.