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Integrate and Derivate Sine


MrrM

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Hi,
I've a PXI-7841R (FPGA).
My VI needs to send the derivative of a sine wave (volts) to an external card and acquire a sine wave input (velocity) that I have to integrate. 

The sine wave later become with two harmonics.
When the frequency is too high, I notice aliasing problems and the sine's derivative  amplitude and integral are not exact.

 

Checking with simulink, for example with a sinusoid of amplitude 1, the integral should have amplitude 2 and the derivative 1.

 

I have attached a screenshot of simulink and VI simple to check if the integral and the derivative values are corrected, by changing the frequency.

 

Any help would be appreciated.

 

Regards

post-51276-0-69453600-1395745097_thumb.j

dev int simulate - Copia.vi

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sorry

 

"......Checking with simulink, for example with a sinusoid of amplitude 1, the integral should have amplitude 1 and the derivative 1...."

 

The problem is in Labview when I change frequency the sine's derivative amplitude and integral are not exact.

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