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Using Ports in Cadence

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aryajur

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I am using a port symbol for an input source. The input source should be an AC source with a source resistance of 50 ohms. The problem is when I use the port and do an AC Analysis the output is 0 from the port.
So how do I use the port in the AC analysis?
 

aryajur said:
I am using a port symbol for an input source. The input source should be an AC source with a source resistance of 50 ohms. The problem is when I use the port and do an AC Analysis the output is 0 from the port.
So how do I use the port in the AC analysis?
Click to expand...

1) If you want to do an AC analysis then please dont use port!!!!!

use vsin from "analogLib" and make sure u set the internal source resistance to 0 Ohms and add an external resistor or set it to 50 Ohms

2) if you want to run an S-Parameter analysis, then use "psin" from "analogLib"


Hope this helps!
 
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    aryajur

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    anhnha

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In PORT, U must click the "display small signal params", and set proper parameters, remember all values are doubled. the reason is in the ideal of perfect match (half half).
and I dont think that it makes differences whether to use port or Vsin. both can work as long as been set the parameters properly. try it.
 
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