northumber82
Member level 3
[SOLVED] How to beta tolerance in LTspice?
There is a method to set a percent value tolerance of beta of BJTs models in LTspice?
I used function "Worst Case" and "Monte Carlo" for resistors and capacitors:
Then what for the transistors beta? There is anything?
- - - Updated - - -
Ok sorry, I answer myself because I found the solution 2 minutes later:
Editing the transistor model and put the same function "mc" or "wc" to the parameter "Bf".
Example:
Bf=420
After:
Bf={wc(420,0.05)}
Tolerance of 5%
There is a method to set a percent value tolerance of beta of BJTs models in LTspice?
I used function "Worst Case" and "Monte Carlo" for resistors and capacitors:
Code:
Worst case function:
.func wc(nom,tol) if(flat(1)>0,nom*(1+tol),nom*(1-tol))
Application:
{wc(nom,tol)}
Then run with:
.step param run 1 10 1Then what for the transistors beta? There is anything?
- - - Updated - - -
Ok sorry, I answer myself because I found the solution 2 minutes later:
Editing the transistor model and put the same function "mc" or "wc" to the parameter "Bf".
Example:
Bf=420
After:
Bf={wc(420,0.05)}
Tolerance of 5%