Sequential (100) delay circuit d

https://wodewangzhishime.blogspot.com/2023/12/sequential-99.html

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Ref : https://wodewangzhishime.blogspot.com/2023/12/sequential-99.html
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Me: This article (https://wodewangzhishime.blogspot.com/2023/12/blog-post_11.html) mention that if I input 3-2-1-4, it stack overflow. Becuase 3-2 are too close to each other. . .

John: It is the problem of frequency.

Me: Yes, . . Look at the 1st picture of this article. . It is an RJ45 circuit. .  This circuit use a capacitor and an inductor to form a filter.

John: What's the filter for??

Me: For filtering signal. . . It let the signal within the boundary of frequency pass through.

John: That mean, it let 3-2 enter the ground.

Me: Yes,