Thanks Matt, it's something I've wanted to write for a couple years now, ever since I read Howard Johnson's "High Speed Signal Propagation" and finally found some time. That line connects a W element to the end of the two-port chain. The W element is a lossy transmission line model. The arguments are (kind of similar to the SPICE W-Element model): length -- length of T-Line (inches) L -- inductance per meter (H/m) C -- capacitance per meter (C/m) R0 -- series resistance per meter (Ohm/m) -- default = 0 G0 -- parallel conductance per meter (S/m) -- default = 0 Rs -- skin effect resistance (Ohm/(m*sqrt(Hz)) -- default = 0 Gd -- dielectric loss conductance (S/(m*Hz) -- default = 0 You can use a tool like mmtl (http://mmtl.sourceforge.net/) to calculate the arguments for arbitrary t-line geometries. There is also a simple non-lossy t-line model that's easier to use called "T" with these arguments: length -- length of T-Line (inches) Zc -- characteristic impedance (Ohms) er -- permitivity (unitless) -- default = 4.3 For some more examples you can try: import py2port help(pytport.twoport) help(pytport.W) help(pytport.T) Cheers, Charles Matt Ettus wrote: > Charles Eidsness wrote: >> Hi All, >> >> This isn't eispice news but I just released a new tool called py2port. It >> can be >> used to perform two-port and one-port linear circuit analysis. I thought the >> members on the eispice list might be interested. You can find it here: >> >> http://www.thedigitalmachine.net/py2port.html >> >> If you have any comments, questions, or concerns please let me know. >> > > Charles, > > Very cool work. I like the PRBS part especially. Can you tell me what > this line is: > > |cct += py2port.W(10, 6.35011e-7, 5.10343e-11, 0.0, 0.0, 0.0, 0.0) > > It looks like it adds a component, but I don't know what a W is. > > Matt > > | > > > ------------------------------------------------------------------ > To unsubscribe from the eispice list send an email to: > eispice-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > ------------------------------------------------------------------ To unsubscribe from the eispice list send an email to: eispice-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field