Question

The MOSFET circuit implements the function.

• A. A(B+C)
• B. A+BC
• C. \( \overline{A + BC} \)
• D. ABC

Hint:

For CMOS logic, output is the complement of the NMOS pull-down network function.

Answer 1

The Correct Option is C

From the CMOS circuit:
- Pull-down (NMOS) side has M2 and M3 in series (representing AND: BC) and in parallel with M1 (OR with A), giving \( A + BC \).
- Pull-up (PMOS) side is the complement logic.
The output Y is the complement of the NMOS pull-down logic: \[ Y = \overline{A + BC} \] This is a standard CMOS implementation of a NOR-type combination.