Practice Objective (4.4.1) - Design and Simulation of Basic Combinational CMOS Logic Gates (NAND/NOR)
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Objective

Practice - Objective - 4.4.1

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Practice Questions

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Question 1 Easy

What is the output of a 2-input NAND gate when both inputs are HIGH?

💡 Hint: Recall the truth table for NAND gates.

Question 2 Easy

How does the configuration of NMOS and PMOS differ in a NAND gate vs a NOR gate?

💡 Hint: Think about the logic functions and how current flows.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the expected output of a NAND gate when both inputs are HIGH?

HIGH
LOW
UNKNOWN

💡 Hint: Refer back to the truth table of the NAND gate.

Question 2

True or False: In a NOR gate, both PMOS transistors are connected in parallel.

True
False

💡 Hint: Revisit the configuration of transistor networks in logic gates.

2 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Given a NAND gate with specific NMOS sizes, calculate how changing NMOS width to meet a 50% decrease in propagation delay would affect the overall circuit performance. What trade-offs should be considered?

💡 Hint: Think about how the increase in width impacts the capacitance and delay.

Challenge 2 Hard

Design a circuit using both NAND and NOR gates for a specific logical function (e.g., an adder). Explain how you would size the transistors and the rationale behind the choices made.

💡 Hint: Consider the logical relationships they're performing and how that affects their gate sizing decisions.

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