Iamalearner
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Posts: 5
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Hi thanks for the reply, I seek help but for that i need to specify the problem in detail. Here is the detail ..
I have a differential LNA with output pins as out+ and out-. At the outputs I have stuck in two "psin" ports, one at each differential output.
At the input side, again i have two "psin" ports , one at each differential input.
Now I do "sp" analysis. If I highlight "NO" in the "Do Noise" field, the sp analysis works and i am able to plot S11, S22 etc.
But the problem starts when i highlight "YES" in the "Do Noise". When i do that, It prompts me to specify the "output Port" and "input Port". Now I amstuck, since I have two output ports and two input ports. Therefore, without much knowing, I click on the "psin" port corresponding to "out+" and specify it as output port in do-noise. Similarly, I click on "psin" port corresponding to "In+" and specify it as "input port" in do-noise.
this is how the completed form looks like : *********************************** Sweep Variable (frequency highlighted)
Sweep range (Start-Stop highlighted) Start : 800M Stop: 5G
Sweep Type (linear selected) Number of steps : 40
Do Noise ("yes" highlighted") and output and input ports specifiedas explained above. *******************************************
Now when the simulation is run, I get this error : "Error found by spectre at freq = 800 MHz during SP analysis `sp'. 'iprobe' or 'oprobe' did not appear in the first or the second entry in 'ports' parameter. Respecify 'ports' parameter and start again.
This is the problem and Any help is highly appreciated Thankyou very much
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