[SOLVED] PSPICE node parameter

[sk614]

Hello,
I want to set the current source I1 as a function of node "VO", how can I do as a parameter? such that I1=60/(Vo+1)?
View attachment SCHEMATIC1 _ PAGE1.pdf


**** INCLUDING SCHEMATIC1.net ****
* source BASSOSIMS
C_C1 N14434 VO 1u TC=0,0
R_R1 0 N14434 .5 TC=0,0
R_R2 N14403 N14423 .1 TC=0,0
L_L1 N14423 VO 100u IC=0
I_I1 VO 0 DC {60/(V(VO)+1)}
---------------------$
ERROR(ORPSIM-16318): Missing or invalid expression
V_V2 N14403 0
+PULSE 150 130 0 10n 10n 10m

**** RESUMING simac.cir ****
.END

Error code.


 

[BigBoss]

You should use Voltage Controlled Current Source ( VCCS )
Syntax :
Linear Voltage-Controlled Current Sources
General form:
GXXXXXXX N+ N- NC+ NC- VALUE

Examples:
G1 2 0 5 0 0.1MMHO

N+ and N- are the positive and negative nodes, respectively. Current flow is from the positive node, through the source, to the negative node. NC+ and NC- are the positive and negative controlling nodes, respectively. VALUE is the transconductance (in mhos)

 

[FvM]

Use controlled current source with behavioral expression, e.g.

 G_I1 VO 0 VALUE = {60/(V(VO)+1)}

Review reference manual for details.

 

[sk614]

Use controlled current source with behavioral expression, e.g.

 G_I1 VO 0 VALUE = {60/(V(VO)+1)}

Review reference manual for details.

This is exactly what I want but I cant find the part for it. The closest is "GVALUE" is that right?

my netlist came out as

G_G1         VO 0 VALUE { 60/(V(VO, 0)+1) }

. It'll run now but I have convergence issues on GVALUE

 

[FvM]

If you prefer schematic entry, you can use GVALUE with a respective behavioral expression. Or more generally an ABM block (e.g. ABM1) in combination with a voltage controlled current source G.

- - - Updated - - -

Convergence issues are just expectable with a division operation. Need to add value constraints or modify the behavioral expression.

 

[sk614]

Or more generally an ABM block (e.g. ABM1) in combination with a voltage controlled current source G.

View attachment SCHEMATIC1 _ PAGE2.pdf
Like so?

 

[FvM]

Like so?

You flipped current source in- and output.