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89 Threads found on edaboard.com: Convergence Error
In my experience, Some convergence error occurs because simulator cannot find initial state. If you give sources with VDC, try to source (vdd & reference., etc) with rampup. (i.e. start all sources from 0V, then ramp up to your desired value.) for example, If vdd=3.3V, you can use vpulse or vpwl starting from 0V to 3.3V. Regards.
it's the convergence problem. i suggest you use the spectre as simulator to simulate switch cap circuit.
I have a problem I can't solve. Sometimes when I run long-time simulation by Spectre I need to restat the simulation from checkpoint. I did it before with SpectreS without any problem. But after I'm switched to Spectre I can't restart simulation from checkpoint. Spectre always give an error message about convergence. I don't change anything in sch
As far as I know, convergence refers to having a solution which results in an error which is less than the target. In a circuit simulator, the routine is trying to solve for the node voltages while trying to make sure that algebraic sum of currents into that node is zero (Kirchoff's Current Law - KCL). Instead of zero, a small number is usually tak
Hi People, I'm running a simulation for a optical circuit design which consist of a Limiting amplifier and a common mode feedback circuit. I'm facing a problem in cadence simulation, that is while running transient simulation it is giving the convergence error as in the attachment. This error only come when i run at -40 deg and not in (...)
Hi People, I'm running a simulation for a optical circuit design which consist of a Limiting amplifier and a common mode feedback circuit. I'm facing a problem in cadence simulation, that is while running transient simulation it is giving the convergence error as in the attachment. This error only come when i run at -40 deg and not in (...)
Hello, Has anybody worked in PSpice on SG3525? I am getting a convergence error. How do I overcome this? bimbla.
Hi I am using an ideal op amp in inverting configuration as shown in figure (in pspice). The output fails to converge when i increase the value of feedback resistor (R2) above 14.5 KOhms The simulator gives the following error: error -- convergence problem in transient analysis at Time = 708.8E-06 Time step = 582.1E-18, (...)
i am trying to calculate small signal AC gain of a circuit in H-spice but am not able to do it as spice is giving convergence error. Problem is not getting solved even by using PWL in power supply VCC as then it gives some absurd value of gain please help me in solving this convergence problem as it regularly gives head ache during (...)
Hi, I have a peculiar case. I need some CMOS circuits which are facing convergence problems during Spectre simulation. Some generic blocks like Switching regulators do give some convergence problems during simulation. Can anybody give me the schematic of such circuits which are facing convergence problems. thanks sarfraz
for convergence error, you should first check your circuit, then add some option to help convergence. sometimes different hspice version can solve it. lucky!
Hello, I am working on a DC-DC converter. I am using cadence spectre for simulations. My transient analysis is simulating fine but the DC analysis is giving an error saying No DC Solution(No convergence) Can anybody help me how to overcome this. Thanks Kasi
Hi, 1. Check if the port plane is aligned with the coax face and that there is no gap between them. 2. On the transient solver "specials" menu check the box called: "Add electric shielding around port region". 3. Another reason could be your mesh settings. Try to do a little mesh study and see what are the optimal mesh settings in which you ge
sometims when you choose very low values HSPICE convergence problems happend and some values in its iterations went out of its precision and run time error is shown
There should be a topology problems that influences the convergence of the simulation such as high impedance nodes with ver small capacitors, differential floating lines, branch loops etc. It should be increase the harmonic number instead of decreasing to simulator be converged. There may be numbers of problem that distirb convergence efficie
I'm trying to simulate a circuit in simulink. It was working fine upto a certain point. But after adding a mutual inducatnce element I get the following error. error using ==> svd NaN or Inf prevents convergence. The circuit is complete and the error comes no matter what values for the mutual inductance are given. (...)
What results are you looking to get from HFSS? a) Be sure to check the current distribution. Se my posts in: b) Do a convergence analysis by comparing s-parameters of runs with decreasing Delta-S error tolerance AND port error tolerance (if using wave ports). Do this in MWO als
I am experiencing a similar problem with HFSS. I set up the simulation such that at least 5 runs converge. After a while convergence is achieved. Then in the subsequent 3-4 runs, the convergence is achieved. But suddenly at the 4th or 5th run there is an error of %98. Out of 36 runs, none of the 4 runs converged to the same value after one (...)
**error** no convergence in operating point *** *** hspice diagnostic *** nonconvergent voltage failures= 0 nonconvergent element current failures= 1 in such case,how shall I tackle?
Looks like a problem with the MOSFETs -- which are modeled being modeled by the subcircuits (.subckt) definitions. Try the following in your simulation .OPTIONS ITL1=400 This is the number of iterations the simulator will perform before giving up. Let me know what happens. Without seeing your schematic, my guess is that y