Difficulty in putting transconductance value in ideal VCCS 'G' in PSPICE.

[viperpaki007]

Hi All,

I am trying to use VCCS source in PSPICE with specified transconductance value of 50mS. I am using component 'G' in Pspice for that. The problem is, although i am putting 50mS in value column of 'G', it still simulates the circuit with transconductance =1S. I don't know what is the reason. Am i using the right component?

looking forward for your comments

regards

 

[keith1200rs]

It should work. Are you putting 0.05 or 50m as the transconductance (not 50ms)?

Keith.

 

[viperpaki007]

Hi,

Please look at my test circuit and simulation result. It is still showing transconductance of 1S

 

[keith1200rs]

Could you post the netlist you get from the circuit? The circuit certainly looks correct.

Keith

 

[FvM]

It is still showing transconductance of 1S

Looks like. But it's surely not a general PSPICE problem. You may want to inspect the generated netlist. Or post the project files.

 

[atripathi]

Check if you have defined the G device parameter appropriately.
Following circuit should give you desired result

v1 1 0 12
G1 2 0 0 1 50m
R1 2 0 1
.DC LIN v1 0 10 1
.probe
.end

 

[LvW]

In my PSpice version (9.2) there is only one ABM model for a VCCS that is called by GVALUE.
Which version are you using?

---------- Post added at 15:53 ---------- Previous post was at 15:44 ----------

The corresponding line in the netlist looks like this:
G_G1 $N_0001 0 VALUE { V($N_0002, 0)*50m }

 

[keith1200rs]

I thought the VCCS (G source) had 4 nodes, two in, two out. Your line only has two nodes. I cannot check the Pspice documentation at the moment but maybe you can?

Keith

 

[LvW]

I thought the VCCS (G source) had 4 nodes, two in, two out. Your line only has two nodes. I cannot check the Pspice documentation at the moment but maybe you can?

Keith

No, it has 4 nodes.
Both output nodes are given directly with the name of the model ($N_001 and 0) and both input nodes are given with the voltage difference (between nodes $N_002 and 0) to be multiplied by 50m.

 

[keith1200rs]

Yes, my mistake. I was only looking at the first part and reading it like the Hspice syntax.

Keith