... | @@ -56,6 +56,20 @@ they clean the edge. As the LC impulse response is linked to the quality |
... | @@ -56,6 +56,20 @@ they clean the edge. As the LC impulse response is linked to the quality |
|
of the pulse, we clean then the damped sine shapes and improve the
|
|
of the pulse, we clean then the damped sine shapes and improve the
|
|
fitting results.
|
|
fitting results.
|
|
|
|
|
|
|
|
Despite the CMOS gates, we still have distortion at the beginning of the
|
|
|
|
pulse (Figure 2). This ramp is due to the fact that our pulse is not a
|
|
|
|
perfect Dirac model. This ramp adds error on the measurements and has to
|
|
|
|
be removed before applying the fitting algorithm. The proposed solution
|
|
|
|
consists in removing these points from the analysed frame before
|
|
|
|
applying the fitting. By doing this, we unfortunately loose some SNR
|
|
|
|
(Signal to Noise Ratio) points. We tried to increase the amplifier gain
|
|
|
|
to have increase the SNR of the points in the used frame.
|
|
|
|
Unfortunatelly, this saturates the ADC. As its recovery time is
|
|
|
|
relatively long, the non linearities decrease the results.
|
|
|
|
|
|
|
|
/4747
|
|
|
|
*Figure 2 - Distorrtion at the beginning of the pulse*
|
|
|
|
|
|
-----
|
|
-----
|
|
|
|
|
|
6th of December 2016 - Nicolas Boucquey
|
|
6th of December 2016 - Nicolas Boucquey
|
... | | ... | |