summary
● An AND gate produces a 1 output when all of its inputs are 1s.
● An AND gate performs the basic operation of multiplication.
● An OR gate produces a 1 output if any of its inputs are 1s.
● An OR gate performs the basic operation of addition.
● A NOT gate performs the function called inversion or complementation.
● A NOT gate converts the input state to an opposite output state.
● A NAND gate is a combination of an AND gate and an inverter.
● A NAND gate produces 1 output when any of the inputs are 0s.
● A NOR gate is a combination of an OR gate and an inverter.
● A NOR gate produces a 1 output only when both inputs are 0s.
● An exclusive OR (XOR) gate produces a 1 output only if both inputs are different.
● An exclusive NOR (XNOR) gate produces a 1 output only when both inputs are the same.
● A buffer isolates conventional gates from other circuitry.
● A buffer provides a high current for heavy loads or fan-outs.
● A three-state buffer has a high-impedance third state.