**NMOS AND-OR-Invert Gate Circuit**

NMOS AOI Gate Circuit |

*AB*and

*CD*. These two AND gates are connected in parallel so that they perform an ORing operation. This AND-OR function is then NOTed to produce the function

*Z*= (

*AB*+

*CD*)′. As shown in Fig. 3.25, transistors

*T*

_{1 }and

*T*

_{2}form one AND operation and

*T*

_{3}and

*T*

_{4}form the other. The parallel combination of these two pairs will produce the desired AOI output.

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