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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