Transmission Line Model txl

Fahim
2013-03-24
2013-06-12
  • Fahim
    Fahim
    2013-03-24

    Hi,

    I want to use lossy transmission line in NgSpice. I got the model txl in manual as below.

    Y1 1 0 2 0 ymod LEN=2
    .MODEL ymod txl R= 12 . 45 L = 8.972e−9 G=0 C= 0.468e−12 length =16

    I am confused with len and length as it is not properly explained in manual.

    Also as we are already specifying value of R,L,G and C so I am assuming that it will calculate delay on its own depending upon value of this component. Please let me know if my assumption is wrong.

    Regards,
    Fahim

     
  • Fahim,
    in a first glance I would say that your RLGC model will describe a 16m line and you are using 2 parts of them, means 32m.
    But I saw in simulation the scaling is not exchangable.

    These kspice models are in experimental state. Make your own experiments and share your experiences.

    BR
    Dietmar

     
  • Fahim
    Fahim
    2013-03-25

    Thanks !!!!!

    We are actually trying to model lossy tranmission line.

    Does the reolution limit is only 1ps in transient analysis?

    Regards,
    Fahim