Transmission line model for twisted pair cable/backplane

[vaibhavar]

twisted pair transmission line

Dear all,
I need a transmission line model for twisted pair cable or a backplane trace (differential) for typical lengths, which i can use to simultate with my designed I/O transmitter circuit.
Any help/guidance is appreciated.


Thanking You
Vaibhav

 

[FvM]

twisted pair model

Basic transmission line operation can be modelled by SPICE models quite good. Common mode and differential part has to be modelled by mutiple components.

Lossy line modelling is more complex, it depends on how exactly the waveform distortions should be reproduced. To my opinion, the best lossy line models have been designed for the APLAC simulator. See e.g. **broken link removed**