pancho_hideboo
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”cline” is included in “rfTlineLib”.In my virtuso analoglib there is no cline.
Show me netlist.Is it possible for you to show me how to use tline for the example I attached.
Show me netlist.
I will correct your netlist.
PORT2 (net06 0) port r=75 x=-60 type=dc
PORT0 (net05 0) port type=dc
T6 (0 net06 0 net05) tline z0=75 f=40G nl=.149
T0 (0 net010 0 net06) tline z0=75 f=40G nl=.126
PORT2 (net06 0) port r=75 x=-60 type=dc
PORT0 (net05 0) port type=dc
T6 (0 net06 0 net05) tline z0=75 f=40G nl=.149
T0 (0 0 0 net06) tline z0=75 f=40G nl=.126
Shunt Open StubCode:PORT2 (net06 0) port r=75 x=-60 type=dc PORT0 (net05 0) port type=dc T6 (0 net06 0 net05) tline z0=75 f=40G nl=.149 T0 (0 net010 0 net06) tline z0=75 f=40G nl=.126
Why don’t you set reference impedance of port0 ?
Right.Even after setting the port0 reference impedance to 50 ohm, I got the same.
However, I think that it shouldn't impact the impedance seen into the network.
What frequency do you apply for evaluation of Zin ?
OK.Is it still okay even If I don't get exact 15+j30?
>> Zload=75-j*60;
>> Y1=1/Zload+j*tan(2*pi*0.126)/75;
>> S1=(1/Y1-75)/(1/Y1+75);
>> S2=S1*exp(-j*4*pi*0.149);
>> Zin=75*(1+S2)/(1-S2)
Zin =
15.2275 +30.4832i
Why don’t you set reference impedance of port0 ?
What tool do you use ?by the way, setting something in the port is changing what impedance we see at the input of the network.
What tool do you use ?I see Zin as 5.74+j*2.63 ohm when no reference impedance is set in the port
and Zin is 5.74+j*5.42 when reference impedance is 5.5+j*2.8.
CadenceWhat tool do you use ?
Thanks for the suggestion, so far I just used GUI, maybe I should take advantage of coding.Instead, use skill function directly.
How to evaluate Zin ?
What do you want to mean ?Cadence
What do you want to mean ?maybe I should take advantage of coding.
What do you want to mean ?I keep a port wherever I want to find impedance and run s-parameter simulation.
This is the only way I know.
Direct Plot in ADE use OCEAN function "zm()".
However it is not valid for complex reference impedance.
Calculate Zin based on correct theory by primitive Skill function without using "zm()".
Thanks for the guidelines,The followings are general notes for you.
- Always describe correct tool's name and vendor's name which you use as tool or simulator.
- Describe in detail and correctly with using correct terminologies.
- Warnigns are different from Errors.
- ADS is not name of simulator.
- There is no tool which name is Cadence.
- Don't use Direct Plot of Cadence ADE blindly without knowing definition.
- Don't mix up Simulation with Post Processing. They are completely different phase.
- MATLAB are different from Simulink.
It gives correct value if port impedance is pure real number.Oh ..I plot real and imaginary parts from ZM function in Direct plot,
Is it not equal to Complex impedance looking into the port?
Wrong. Cadence is a name of Company.1. I know ADS and Cadence are Electronic design systems.
Needless to say, very wrong.You say they are not tools, but I think they are software tools for electronic design.
There is no tool whose name is Keysight, Synopsys, Mentor, etc.Can you tell me why they are not tools?
Right.2. I know Spectre is a simulator,
Wrong.Virtuoso is Schematic editor.
Cadence Virtuoso is managed by Skill Language.3. I don't know exactly what is Skill and OCEAN but I think they are CAD scripting languages.
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