1
\$\begingroup\$

I have problem simulating this circuit in Multisim:

(LTSpice)

enter image description here

Here is scheme from Multisim:

enter image description here

When I run transient analysis, I got this:

------ Checking SPICE netlist for Design3 - Saturday, September 26, 2015, 10:58:03 AM ------ ======= SPICE Netlist check completed, 0 error(s), 0 warning(s) ======= Transient time point calculation did not converge Simulation canceled

Any idea what's wrong? Thanks in advance

\$\endgroup\$
9
  • \$\begingroup\$ LTspice and multisim almost certainly have different [default] converge settings. Version 12 of multisim seems to come with a wizard for theese issues. (So what version are you using?) Occasionally I've had to tweak LTspice, but I have no experience with multisim. \$\endgroup\$ Sep 26, 2015 at 10:09
  • \$\begingroup\$ Hi, thanks for reply. I use Multisim Power Pro 14. \$\endgroup\$
    – hari
    Sep 26, 2015 at 10:14
  • \$\begingroup\$ And with previous version I didn't have problems simulating circuits with opamps. It is interesting that if I remove opamp voltage sources, simulation starts without errors. \$\endgroup\$
    – hari
    Sep 26, 2015 at 10:24
  • \$\begingroup\$ Try a different op-amp model and see if it works. \$\endgroup\$
    – Andy aka
    Sep 26, 2015 at 10:30
  • 1
    \$\begingroup\$ Solved. I made stupid mistake, I didn't connect power supplies to opamp correctly. \$\endgroup\$
    – hari
    Sep 26, 2015 at 17:56

1 Answer 1

0
\$\begingroup\$

Power supplies are reversed.

Pin 7 = V+

Pin 4 = V-

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.