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The paper addresses bandwidth widening of an analog signal path, composed of a high-speed infrared photodetector, an amplifier and a transmission line connecting the two. To investigate influence of design variables upon bandwidth a simplified model of the signal path is analyzed first. Several design scenarios are considered, including transmission line length adjustment, but also insertion of a...
We present a simple small-signal parameterized equivalent circuit for HgCdTe photodetectors operating at high temperatures in the middle and long wavelength of the infrared spectrum. This circuit is capable of accurate modeling the impedance of these devices upon bandwidth of several GHz and for a wide range of bias voltage and temperatures. We have implemented this model as a parameterized sub-circuit...
This paper presents a three step procedure for creating a small signal parameterized circuit model of a two-port RF module characterized in frequency domain. First, Vector Fitting is used to find rational approximation of Y matrix entries. Second, RLC equivalent circuits are synthesized for each approximation and complimented with the controlled sources. Finally the RLC components are parameterized...
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