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How to improve the anti-interference ability and electromagnetic compatibility when developing electronic products with processors?

How to improve the anti-interference ability and electromagnetic compatibility when developing electronic products with processors?

  • 2020-06-05
  • Views:0

How to improve the anti-interference ability and electromagnetic compatibility when developing electronic products with processors?

(Summary description)

  • Categories:NEWS
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  • 2020-06-05
  • Views:0
Information

1. Pay special attention to anti-EMI for the following systems:
(1) The microcontroller has a particularly high clock frequency and a particularly fast bus cycle.
(2) The system contains high-power, high-current drive circuits, such as spark generating relays, high-current switches, etc.
(3) System containing weak analog signal circuit and high precision A/D transform circuit.
2. To increase the anti-emi capability of the system, the following measures shall be taken:
(1) Select the microcontroller with low frequency:
Selecting the microcontroller with low external clock frequency can effectively reduce the noise and improve the anti-interference ability of the system. Square waves and sine waves of the same frequency have much more high-frequency components than sine waves. Although the amplitude of the high frequency component of the square wave is smaller than that of the fundamental wave, the higher the frequency is, the more likely it is to emit noise source. The most influential high frequency noise produced by the microcontroller is about 3 times of the clock frequency.
(2) Reduce the distortion in signal transmission
In the process of equipment development, still maintain a strong vitality.

 

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