Other Logic Functions

• Other logic functions can be realized from these three gates.
• For example, the AND function can be realized by
  • combining a NAND gate followed by an inverter,
  • using inverters at the input of a NOR gate.
• The AND function can be summarized by the following table:
  

  V1	V2	Output
  Low	Low	LOW
  Low	High	Low
  High	Low	Low
  High	High	High

• Similarly, the OR function can be realized by
  • combining a NOR gate followed by an inverter,
  • using inverters at the input of a NAND gate.

  

Figure 3.5: AND gate constructed from standard gates