Generalized noise analysis technique for four-port linear networks
ABSTRACT In this paper, we present and discuss a general and modular semi-analytical analysis method for the electrical and the noise characterization of noisy linear four-port circuits. The analysis method presented builds upon the concept of noise correlation matrices and is valid for both two-port and four-port electrical networks. We also consider a four-port active transversal filter case study for which we compare the measured results with those obtained from the analysis presented here. The analytical results are in very good agreement with measured results.
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ABSTRACT: This brief describes the influences of the source and load impedance matrices on the main small-signal and noise characteristics of a multiple-input-port and multiple-output-port (MIPMOP) device. Expressions for the noise figures of an MIPMOP device are provided in the impedance and admittance representations. We define the natural noise figures as the noise figures evaluated in the case where the multiport source behaves like a noisy passive network at the temperature T <sub>0</sub>. This theory is applied to a multiple-input and multiple-output series-series feedback amplifier (MIMO-SSFA), some characteristics of which are computed and measured.Circuits and Systems II: Express Briefs, IEEE Transactions on 07/2009; · 1.41 Impact Factor