... | @@ -40,20 +40,23 @@ filter: |
... | @@ -40,20 +40,23 @@ filter: |
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Measured frequency response - marker at the frequency that is
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Measured frequency response - marker at the frequency that is
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subharmonic of the sampling frequency (no "signal leakage" in FFT).
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subharmonic of the sampling frequency (no "signal leakage" in FFT).
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This is the frequency of our desired input
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This is the frequency of our desired input signal
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signal.
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(the
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![](/uploads/40183edda830c26609c83dfec4912084/P1040720.JPG)
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![](/uploads/40183edda830c26609c83dfec4912084/P1040720.JPG)
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Marker at the second harmonics. Filter's attenuation at this frequency
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Marker at the second harmonics. Filter's attenuation at this frequency
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is 46 dB (-4 dB for the base signal
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is 46 dB (-4 dB for the base signal frequency).
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frequency).
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It matches simulation results very
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well.
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![](/uploads/0c8296bbd8c6e74dc2cc9daabb13448f/P1040721.JPG)
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![](/uploads/0c8296bbd8c6e74dc2cc9daabb13448f/P1040721.JPG)
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SUCCESS\!\!\! FFT of the filtred signal indicates the second harmonics
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*Conclusion**
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level of -90 dB and third harmonics of -80 dB. I don't have to add, that
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these values are much closer to our
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*SUCCESS\!\!\!** FFT of the filtred signal indicates the second
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harmonics level of -90 dB and third harmonics of -80 dB. I don't have to
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add, that these values are much closer to our
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estimations.
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estimations.
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![](/uploads/a52614e977c3f6023551f99645724c06/sine_filter.jpg)
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![](/uploads/a52614e977c3f6023551f99645724c06/sine_filter.jpg)
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