And Gate Transistor Level. In other words for a logic and gate any low input will give a low output. The complement of aoi logic is or and invert logic where the or gates precede a nand gate.
The complement of aoi logic is or and invert logic where the or gates precede a nand gate. Often this is done from a def description of the layout. Construction of aoi cells is particularly efficient using cmos technology where the total number of transistor gates can be compared to the same construction using nand logic or nor logic.
Hence for an and gate the output is high only when both the inputs are high.
The relation between input and output values can be explained using the and gate truth table shown below. The base of both the transistors act like inputs and one of the emitter of either of the. The transistors are connected in series and their bases are used as input. The equations output can be easily explained using the and gate boolean equation which is q a x b or q ab.
