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Modeling equation in Orcad

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hakhamanesh

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I want to circuit modeling rate equation using pspice.
For example :
c1*dv1/dt = v1/a - v2/b + c*v1*v2
that each term refer to a current and v1 and v2 refer as node voltage.
c1*dv1/dt ====> current of a capacitor
v1/a====> current of a resistor
v2/a====> current of a resistor
and my question:
how can I model the last term?
can we use a VCCS that depend on 2 nodes?
thanks for your attention
 

Hspice allows for such a behavioral construct as
Gxxx node1 node0 cur = '(v1/a - v2/b + c*v1*v2)'
Don't know if this is also possible within Orcad's Pspice? Just try it!
 

What about ABM blocks in pspice. For example EMUL, ESUM, GMUL and GSUM?
 

What about ABM blocks in pspice. For example EMUL, ESUM, GMUL and GSUM?
Yes, should work if you have Pspice A/D. I think you'd need
2*EVALUE (for v1/a and v2/b), 1*EMULT (v1*v2), another EVALUE to get (c*v1*v2), and then 1*GSUM to add/subtract the 3 terms.
 
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