Topic
Learning resources
Level
7th - College
Format
Online video/YouTube
A logic gate is an electronic circuit that performs a logical operation on one or more input signals and produces an output signal. The most common types of logic gates are AND, OR, NOT, NAND, and NOR. Logic gates are the building blocks of digital circuits.
Digital circuits are made up of a combination of logic gates. The output of each logic gate is a digital signal either HIGH or LOW. The output of the logic gate depends on the particular type of logic gate and the input signals. The truth table for each type of logic gate shows the output for all possible combinations of input signals.
Logic gates are classified as combinational or sequential based on their timing characteristics. Combinational logic gates change their output immediately in response to a change in input. Sequential logic gates change their output only after a clock signal is received.
Digital circuits are made up of a series of interconnected logic gates. The output of one gate can be connected to the input of another gate, and the output of that second gate can be connected to the input of a third gate, and so on. By connecting the gates in different ways, different logic functions can be performed.
The most basic digital circuit is a NOT gate connected to an input. This circuit will invert the input signal. If the input is 1, the output will be 0, and if the input is 0, the output will be 1.
Digital circuits can be made more complex by adding more gates. For example, a two-input AND gate can be added to the circuit. This will require both inputs to be 1 before the output will be 1.
As digital circuits become more complex, they can perform more sophisticated operations. For example, a circuit can be designed to add two binary numbers. This is known as an adder.
Digital circuits are an important part of modern technology. They are used in computers, cell phones, and many other devices. By understanding how digital circuits work, you can learn to design and build your own circuits.
In digital electronics, a logic gate is an idealized or physical device that performs a Boolean function; that is, it performs a logical operation on one or more binary inputs and produces a single binary output. Depending on the design of the logic gate, the output may be either active-high or active-low.
The three basic types of logic gates are the AND gate, the OR gate, and the NOT gate. More complex logic gates such as NAND gates and NOR gates are created by combining basic gates.
Boolean functions are used to model the behavior of circuit elements like logic gates. A boolean function is a mathematical function that takes one or more boolean inputs and produces a single boolean output.
The most common type of logic gate is the AND gate. An AND gate takes two boolean inputs and produces a single boolean output. If both of the inputs are true, then the output is also true. If one or both of the inputs are false, then the output is false.
The OR gate is similar to the AND gate, except that it takes two boolean inputs and produces a single boolean output. If one or both of the inputs are true, then the output is also true. If both of the inputs are false, then the output is false.
The NOT gate is a special type of logic gate that takes a single boolean input and produces a single boolean output. The output of a NOT gate is the opposite of the input. If the input is true, then the output is false. If the input is false, then the output is true.
NAND and NOR gates are created by combining basic logic gates. A NAND gate is an AND gate with a NOT gate attached to the output. A NOR gate is an OR gate with a NOT gate attached to the output.