FreeLists / si-list / [SI-LIST] Reference when interconnect is an S-parameter file

["Zanella, Fabrizio" <fzanella@xxxxxxxxxxxxx>]

I'm using a Touchstone .s4p file (4 port S-parameter) as my channel in a
backplane serdes simulation in Hspice.  There's no ground reference for
the touchstone file; my simulation deck basically looks like this:
 

Xdriver  inp inn vcc vss txp txn tx_model $ plus pre-emphasis settings

S1 txp txn   rxp  rxn   mname=s_model  

Xreceiver rxp rxn vcc vss  input_model

 

My question is does it make sense to keep the same return node, vss, for
the driver and receiver circuits or should I add in  LCR circuitry to
account for card1-connector-backplane-connector-card2 path it takes?  

 

Thanks and regards,

Fabrizio Zanella

Signal Integrity

Enterasys Networks

Andover, MA

Phone:  978-684-1340

fzanella@xxxxxxxxxxxxx

 


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