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In the CMOS stick diagrams the n and p transistors are separated by :

  • A.Thick black line
  • B.Dotted blue line
  • C.Thick yellow line
  • D.Dotted brown line

Answer: D

The n and p transistors are separated by a dotted brown line.

In the colour code used for CMOS stick diagrams (as in Pucknell and Eshraghian's Basic VLSI Design), the n-well or demarcation line that divides the region of n-transistors from the region of p-transistors is drawn in brown.

The other colours have their own meanings in the same scheme: blue is metal, yellow is p-diffusion, and black marks contact cuts. None of them is the demarcation line.

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