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How to force node voltage (analog) in AMS simulation.

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findsriharsha

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Hello,

I need to set the node voltage to a particular analog value throughout my AMS sim. Does anyone know how to do that?

I have done the same thing using "force" statement for digital signal in AMS and it had worked. I tried this for analog signal, it didnt work. Please help!

I dont think .NODESET or .IC will work as they are used to just set the initial condition for convergence. Suggest me if I am wrong..

Thanks in advance..
 

You can just add a voltage source to the node. As a SPICE line, it would look like this:

VFORCE NodeName 0 5

This line forces node "NodeName" to 5V above Ground, by adding a voltage source called "VFORCE"

Hope this helps.
 

Hi Zeker,

Thanks for the quick response. I am running this AMS sim from a snapshot. Can I use this VFORCE command in the AMS script?

Please let me know if my question does not make any sense, I will try rephrasing it :)

Thanks!
 

I'm not sure how AMS works, but it's pretty standard SPICE notation. If you can enter other standard SPICE commands like .NODESET and .IC, I would imagine you should be able to enter this line too.
 

ZekeR said:
I'm not sure how AMS works, but it's pretty standard SPICE notation. If you can enter other standard SPICE commands like .NODESET and .IC, I would imagine you should be able to enter this line too.
Click to expand...

I tried VFORCE, it does not work in cadence environment. Does anyone else have any suggestion?
 

Okay, perhaps that's just standard syntax for LTspice. According to **broken link removed**, the netlist uses this sort of syntax:

V4 (NodeName GND) vsource dc=5 type=dc

Let me know if this works for you.
 

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