6.1. Introduction to Digital CMOS Logic Gates

Try these first

1. 1.

   Define a CMOS inverter's operation.

   Hint

   Think about how the output changes when the input is high versus low.

2. 2.

   What does a NAND gate do?

   Hint

   Consider the meaning of 'NAND' in the name.

3. 3.

   What type of logic gate outputs a low signal only when both inputs are high?

   • XOR
   • NAND
   • NOR

   Hint

   Think of the meaning of 'NAND'.

4. 4.

   True or False: An inverter outputs the same value as the input.

   • True
   • False

   Hint

   Recall what an inverter does.

5. 5.

   Design a simple circuit using only NAND gates to create an AND gate. Describe how you would do this.

   Hint

   Think about how NAND gates can be combined to create other gate functionalities.

6. 6.

   Explain the impact of increasing capacitance on the propagation delay in a CMOS gate.

   Hint

   Focus on the relationship between capacitance and time delay.