sequential (14)

 https://kamchihau.blogspot.com/2022/09/httpskamchihau.html

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Ref: https://wodewangzhishime.blogspot.com/2022/02/the-definition-of-aliens-differing-in.html .

 

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This is a Mosfet.

If the current flow to the left hand-side, left shift at the source, and, left shift at the drain.

If the current flow to the right hand-side, right shift at the source, and, right shift at the drain.