Uxxxxxxx

Uniform Distributed RC Lines (Lossy): This device is translated as two ideal transformers and one ideal distributed RC line.

Example SPICE Command Line:

u1 1 2 3 URCmodel L=50u N=6
.model URCmodel URC RPERL=rperl CPERL=cperl

SPICE dialect and netlist syntax:

Spice2/3:

uid nin nout nref mname L=len N=lumps

PSpice:

Does not exist

HSpice:

Not supported

ADS Netlist Syntax:

RCLIN:uid nin nout L=len R=rperl C=cperl

OR If node 3 is not ground:

tf:tf1 nin nref net1 0
RCLIN:uid net1 net2 L=len R=rperl C=cperl
tf:tf2 net2 0 nout nref

ADS Schematic Symbol:

Instance Parameters:

uid = Element name
nin, nout = The two element nodes the RC line connects
nref = Node to which the capacitance is connected.
net1, net2 = Nodes inserted to connect RCLIN to transformers.
L = Length of the RC line in meters.
lumps = The number of lumped segments to use in modeling the RC line.
rperl = Resistance per unit length in Ohm/m (default=1000).
cperl = Capacitance per unit length in F/m (default=1.0e-15).

Comments:

N is ignored in translation.

Model parameters are read off the URC model, but no model is placed. Unused parameters are discarded. If the referenced model is not found, the default values specified above are used.

If node 3 is not ground, the transformers are added to float the RCLIN.