Noise countermeasures (2): Ways to consider noise countermeasures
If you design it from the beginning so that it doesn't produce noise, you don't need any noise countermeasures at all. Isn't it? If you can, of course, it's best, but it's not that simple. Its difficulty lies in. .. ..
In digital circuits, some of the signals become noise.
Digital circuits generally use a rectangular wave signal (a quadrilateral wave that reciprocates between two values ​​over a period of time). However, this rectangular wave actually contains a very wide frequency.
Rectangular wave example
Primary: circuit breaker, current transformer, isolating switch, grounding switch, voltage transformer, arrester, electroscope and outlet terminal, etc
Secondary: control cabinet, comprehensive protection, relay and so on
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