GX4201 Video Crosspoint Switch


Posted on Dec 8, 2012

In order to assist the video design engineer in using Gennum's GX4201 video crosspoint, an AC equivalent circuit has been created. A PSpice® netlist of the circuit has been generated and is available on floppy disk. The equivalent circuit is for AC steady state and transient analysis only. Noise and distortion or DC characteristics cannot be predicted with this model. The data accurately predicts the input and output impedances and transfer characteristics of the devices up to 500 MHz with load capacitances ranging from 10 pF to 100 pF.



The signal source for the network is specified as a voltage generator and a source impedance. This source impedance is 25 W or the equivalent output impedance of an amplifier driving the input. Figure 1 shows this set up. The output must be loaded wit




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