Topic: Digital Electronics
The CMOS circuit shown below implements the function
- A. $(A+B)C+D$
- B. $(AB+C)+D$
- C. $\overline{(A+B)C+D}$
- D. $(AB+C)D$
Answer: C. $\overline{(A+B)C+D}$
Explanation: In the pull-down network, transistors A and B are in parallel, which are in series with C, and this entire combination is in parallel with D. Since CMOS logic inherently implements the inverted output, the function is $Y = \overline{(A+B)C+D}$.