I have limited knowledge in hardware design, where i get caught in the following noise issue.
We found out that 1 of a switching regulator we used is interfering our data waveforms as below:
Yellow colour is data waveform and blue colour is waveform form 20V switching regulator.
As seen in the picture, there is a very huge spike that make our data waveform not really smooth.
Switching frequency we set in the regulator (Rt) is 0.6MHz Previously we did a wrong inductance calculation, now we change the inductance value to 20uH to suit our 20V design and it wont help much.
Is there any method we can use to filter the spike?