This paper presents a broadband-noise circuit model for a cold-FET (Vds = 0 V) with a reverse-biased gate. The noise model includes two intrinsic uncorrelated noise-current sources whose spectral densities are determined from measurement of the device's S parameters and noise powers. The model is used to characterize the device's excess noise ratio (ENR) for application to full receiver-noise calibration. Experimental results up to 40 GHz are given.
CitationMaya, M. C.; Lázaro, A.; Pradell, L. Noise model of a reverse-biased cold-FET applied to the characterization of its ENR. Microwave and optical technology letters, 2004, vol. 40, núm. 4, p. 326-330.
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