doAnalyses: Iteration limit reached Error & time step too small

[yukoj2004]

Hello everyone

i want simulation  Sallen-Key Second-Order Low-Pass Filter

0.25Hz

how to solve the error

thanks

[Miguel_V]

Hello,

This seems to do with the opamp component that you chose to use. Beside the fact that the component is not a single rail supply unit, switching it out for a simple ad opamp or a virtual opamp seems to make your circuit run properly.

Kind regards,

[yukoj2004]

---

Miguel_V 已寫：

Hello,

This seems to do with the opamp component that you chose to use. Beside the fact that the component is not a single rail supply unit, switching it out for a simple ad opamp or a virtual opamp seems to make your circuit run properly.

Kind regards,

---

Thank you for response

but my circuit use the opa

so i how to solve the error?

[Miguel_V]

Hey,

So I found out the problem with the model. Seems that when this instrument you created was made, the supply pins were switched. So you created a model with the -VS pin to be the input for positive voltage and the +VS pin with the input for the negative voltage. I would recommend double clicking on the model, Value » Edit component in DB » Symbol » Edit and change the position of VS+ and VS-. Or simply to test your circuit switch the supply and ground.

Cheers,

[yukoj2004]

---

Miguel_V 已寫：

Hey,

So I found out the problem with the model. Seems that when this instrument you created was made, the supply pins were switched. So you created a model with the -VS pin to be the input for positive voltage and the +VS pin with the input for the negative voltage. I would recommend double clicking on the model, Value » Edit component in DB » Symbol » Edit and change the position of VS+ and VS-. Or simply to test your circuit switch the supply and ground.

Cheers,

---

HI 

thanks you respond

i use TLC2274MN spice model with work