It is one of the essential
concept for the system designer .By which, we can limit the noise level for our
system. When the people, who are going to interfacing with lot of the boards in the single system, they got ground noise signal.
Generally this noise signal induced by the solid state relay, switching application or any other
motor driver. But a digital signal is never affected by the any ground noise. But an analog signal is getting affected easily. When you are going to take ADC signal about the sampling voltage level mV or uV, you may get noise values.
You can reduce ground noise following
ways,
1. In case your system is having 3 more boards, the power supply for the three boards should be connected with SMPS terminal directly.
2. In case the first rule not
possible, just create a small intermediate stage from SMPS to hub(just kind of small board to distribute power supply). After that all the boards connected with hub's
ground directly.
Semma Blog!!!!
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