What Is a Digital Circuit?

A circuit that uses digital signals to perform arithmetic and logical operations on digital quantities is called a digital circuit, or digital system. Because it has logic operation and logic processing functions, it is also called digital logic circuit. Modern digital circuits are constructed from several digital integrated devices made by semiconductor processes. Logic gates are the basic unit of digital logic circuits. Memory is a digital circuit used to store binary data. On the whole, digital circuits can be divided into two categories: combinational logic circuits and sequential logic circuits.

Digital circuits

(Circuits that perform arithmetic and logic operations)

From the previous introduction, everyone has learned that digital circuits are based on binary digital logic, and their working signals are discrete digital signals. The electronic transistor in the circuit works in the switching state, sometimes

Divided by function:

1, with both arithmetic and logical operations

The digital circuit is

Digital circuits and digital electronics are widely used in televisions,

The main research object of digital circuits is the logical relationship between the output and input of the circuit, so it cannot be used in digital circuits.

Digital circuits must be rigorously tested before they are properly designed and installed before they can be used. In fact, digital circuit testing should be considered during the logic design phase. If the purpose of the test of the circuit is only to check whether the circuit has failed, this test is called the failure detection of the digital circuit; the test of the logical function of the circuit is called

The main problem studied in digital circuits is the logical relationship between the state of the output signal ("0" or "1") and the input signal ("0" or "1"), that is, the logical function of the circuit.

The research method of digital circuit is

The reasons for electronic devices to process information from analog to digital are mainly in the following areas:

Good stability: Digital circuits are not as susceptible to noise interference as analog circuits.

High reliability: Digital circuits only need to distinguish the presence or absence of signals, so the component parameters of the circuit can allow a larger range of change (drift).

Long-term storage: Digital information can be stored for a long period of time using some medium, such as magnetic tape, magnetic disks, and optical disks.

Convenient for computer processing: In addition to the advantages of intuitive and accurate digital signal output, the most important thing is to facilitate the use of electronic computers for information processing.

Facilitate high integration: Because the structure of the basic unit circuit in digital circuits is relatively simple, and the components are allowed to have greater dispersion, this allows us not only to make many basic units on the same silicon chip, but also to To achieve the yield required for mass production.