The describing equations for a memoryless linear time-invariant two-port network using
y-parameters is given by
iyvyv
iyvyv
1111122
2211222
=+
=+
693
16.2EQUIVALENT CIRCUITS FOR A TWO-PORT NETWORK
the dependent voltage source in series with R
o
at the second port has been converted
into a dependent current source in parallel with R
o
in both circuits.
We take up the circuit in Fig. 16.1-21(a) first. Two nodes A and B and the corre-
sponding node voltage variables v
x
and v
y
are identified in this circuit. We write the
node equations at these two nodes.
Note that we have substituted for v
d
in terms of v
1
and ...
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