Substracting (and comparison) inaccuracy in .dll C++ code

QSPICE
1

Hi all, I am aware of the possible inaccuracies we may encounter when subtracting double variables (voltages/currents) inside the .dll file, but I cannot find a solution to the problem. For example, consider a if statement:
if {Vin - Vout < 10}{Do This!} where Vin and Vout variables are defined as doubles. The subtraction gives back a very inaccurate result which ruins the if condition (It also depends on the range of Vin and Vout — for my case, they might be micro volts). Any solution will be appreciated! Thanks

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You can upload .qsch and .cpp in this forum for review.

3

Hi, Amir.

Make sure that your input port values are of “float(64-bit double)” data type to ensure that you’re getting as much precision as possible from the circuit side.

Like @KSKelvin suggested, maybe upload an example of the problem.

–robert

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Hi @RDunn and @KSKelvin,

Thanks for the help. My bad! problem is solved.

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