The switch diagrams help clarify these rules but we’ll switch to logic gates now to use a more modern representation. NOT, OR and AND Truth Table Truth tables are a representation that defines ...

An AND gate usually has two inputs. AND tells us that both Input A AND Input B have to be 1 (or ON) in order for the output to be 1. Otherwise the output is 0.

When a logic circuit is given, the Boolean expression describing that logic circuit can be obtained by combining the input variables in accordance with the logic gate functions ... it with a ...

Logic gates have one or two 0 or 1 inputs but only one 0 or 1 output as in the following examples. Transistors make up gates, gates make up circuits, and circuits make up electronic systems.

Here’s another entry in the 7400 Logic contest. [Circuitchef] used gates and a few flip-flops ... He provides a nice block diagram which helps to understand the game’s design.

From the logic diagram of Figure 7.23(a), , that is, the logic diagram represents an XOR gate implemented with NAND gates. The timing diagram for the output C is shown in Figure 7.24. Figure 7.24: ...