Digital Circuit 02 AND-gate

Explaination how an AND-gate works in CMOS technology.

The AND-gate is one of the three fundamental elements of digital electronics, together with the NOT-gate and the OR-gate.

← Back to all courses

an AND-gate has two inputs and one output.

watch on youtube

It has two inputs, here the purple and the orange nodes. In this example, both inputs are controlled by rectangle voltage sources.

The output in this example is the green node...

high output only when both inputs are high

Only if both inputs are high, then the red node is pulled to ground,
because the two NMOS-transistors between ground and the red node conduct therefor pull the red node to ground, and the two PMOS-transistors between the positive node and the red node both block.

An AND-Gate consists of three PMOS transistors and three NMOS transistors.

1/9

The images and descriptions of the circuit on this page are public domain.

You may download it, copy it, modify it, distribute it, even if you do not cite the source.

Nevertheless, you might want to cite correctly:

Title=Digital Circuit 02 AND-gate

Author=Benedikt Sessler

Date=25.Sept 2020

Link=https://www.cirnavsys.com/courses/digital-circuit-02-and-gate

The Circuit Navigation System

The Circuit Navigation System

Circuit Navigation System.

Understand electric circuits intuitively.

Digital Circuit 02 AND-gate

high output only when both inputs are high

Second digital circuit: The AND-Gate