... | ... | @@ -49,12 +49,12 @@ The actual filter is built with a nickel-zinc ferrite coil with a 1 uH |
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inductance and a 100 pF capacitor X7R.
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It is also mandatory to be independant of the incomming signal shape and
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level. To do that, we use CMOS gates. On one hand they will always give
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the same output once the input becomes higher than the threshold level,
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we will then always have the same damped sine shape. On the other hand,
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they clean the edge. As the LC impulse response is linked to the quality
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of the pulse, we clean then the damped sine shapes and improve the
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fitting results.
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level. To do that, we use CMOS gates (5PB1108). On one hand they will
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always give the same output once the input becomes higher than the
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threshold level, we will then always have the same damped sine shape. On
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the other hand, they clean the edge. As the LC impulse response is
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linked to the quality of the pulse, we clean then the damped sine shapes
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and improve the fitting results.
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Despite the CMOS gates, we still have distortion at the beginning of the
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pulse (Figure 2). This ramp is due to the fact that our pulse is not a
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