Elenco Understanding Logic Gates Uživatelský manuál stáhnout pdf (Strana 12)

U19

NOR Gate

NOR gates are used in digital logic circuits to perform an inverted logical add. When one of the inputs is

high (1), the output is low. The output will only be high (1) when both inputs are low.

Input (A) Input (B) Output (Q)

0 0 1

0 1 0

1 0 0

1 1 0

This circuit demonstrates how the NOR Gate

(U19) works. Connect one end of the red and

black jumper wires to the A & B inputs on U19

and the loose ends to either low voltage (denoted

as a “0”) or high voltage (denoted as a “1”). If,

and only if, both input A AND input B are low (0,

both green LEDs are off), then the Q output on

U19 will be high (1), and the red LED (D1) will be

on. The output logic is exactly the opposite of the

OR gate, hence this gate is called the NOT OR or

NOR Gate

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Elenco Understanding Logic Gates Uživatelský manuál Strana 12