[Multisim] Transient time point calculation did not converge

AI Thread Summary
The user experienced a convergence issue during transient analysis in Multisim, receiving a message that the transient time point calculation did not converge. They attempted various op-amp models and modifications to the circuit without success. Suggestions included cutting voltage values in half, grounding the output, and performing AC analysis to check for a stable DC operating point. Ultimately, the problem was resolved by correctly connecting the power supplies to the op-amp. Proper connections are crucial for successful simulations in Multisim.
etf
Messages
179
Reaction score
2
Hi. I have problem simulating this circuit in Multisim:

(LTSpice)

2cwms6h.png


Here is scheme from Multisim:

2nhkwvp.png


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
 
Engineering news on Phys.org
I tried different models of opamp and I got same error. Here is my version of software:

2n8detf.jpg
 
cut v4 and v1 in half or set to 0 just to see what happens. Add a 10k to ground on the output to see what happens.

Do you get a stable dc operating point?

Have you tried AC analysis?
 
  • Like
Likes etf
Solved, I didn't connect power supplies to op amp correctly :)
 

Thread 'What happens if shielded cable has a short to the shield?'

While I was rolling out a shielded cable, a though came to my mind - what happens to the current flow in the cable if there came a short between the wire and the shield in both ends of the cable? For simplicity, lets assume a 1-wire copper wire wrapped in an aluminum shield. The wire and the shield has the same cross section area. There are insulating material between them, and in both ends there is a short between them. My first thought, the total resistance of the cable would be reduced...
View full post »

Thread 'How might electronics be different if AC voltage was 72V at 45 Hz?'

Hey guys. I have a question related to electricity and alternating current. Say an alien fictional society developed electricity, and settled on a standard like 73V AC current at 46 Hz. How would appliances be designed, and what impact would the lower frequency and voltage have on transformers, wiring, TVs, computers, LEDs, motors, and heating, assuming the laws of physics and technology are the same as on Earth?
View full post »

Thread 'Why does the amperage go real high if there is a low voltage short?'

I used to be an HVAC technician. One time I had a service call in which there was no power to the thermostat. The thermostat did not have power because the fuse in the air handler was blown. The fuse in the air handler was blown because there was a low voltage short. The rubber coating on one of the thermostat wires was chewed off by a rodent. The exposed metal in the thermostat wire was touching the metal cabinet of the air handler. This was a low voltage short. This low voltage...
View full post »

Similar threads

Engineering Multisim Transient Analysis for LC parallell circuit
Replies
7
Views
4K
Transient Response RLC: Calculating Vc(t) for a Series Circuit | 9121 Problem
Replies
2
Views
3K
I Numerical calculations of a railgun yielded disappointing results
Replies
4
Views
978
I Average number of times a random walk passes a point
Replies
10
Views
2K
Help with Pspice Capture Bias Point Calculation Errors
Replies
9
Views
17K
Calculate the speed of a point based on a graph
Replies
40
Views
4K
Calculating the Moment from a Different Vantage Point
Replies
4
Views
1K
Finding slip-off angle for mass off of sphere?
Replies
7
Views
1K
B Length contraction and Time dilation calculation
Replies
27
Views
3K
CR Transient Problem: Calculate VC at 3 Times
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top