（1） Classification by functional structure

          According to their different functions and structures, integrated circuits can be divided into analog integrated circuits and digital integrated circuits.

          Analog integrated circuits are used to generate, amplify and process various analog signals (referring to signals whose range varies with time boundary. For example, audio signals of semiconductor radios, tape signals of video recorders, etc.), while digital integrated circuits are used to generate, amplify and process various digital signals (referring to discrete value signals within time and range, audio signals and video signals of VCD and DVD playback).

          The basic analog integrated circuits include operational amplifiers, multipliers, integrated voltage regulators, timers, signal generators, etc. There are many kinds of digital integrated circuits. Miniature integrated circuits have many kinds of gate circuits, namely, no gate, no gate or gate; Medium scale integrated circuit includes data selector, coding decoder, trigger, counter, register, etc. Large or ultra large integrated circuits include PLDs (programmable logic devices) and ASICs (application specific integrated circuits).

          From this point of view, the differences between PLD and ASIC among components, devices, circuits and systems are no longer strict. Moreover, PLD device itself is just a hardware carrier, and different circuit functions can be realized by loading different programs. Therefore, modern equipment is no longer pure hardware. Software equipment and corresponding software electronics have been applied more and more in modern electronic design, and their status is becoming increasingly important.

（2） Classification by production process

          According to the production process, integrated circuits can be divided into semiconductor integrated circuits and thin film integrated circuits.

Film integrated circuits are divided into thick film integrated circuits and thin film integrated circuits.

（3） Classification by Integration

          Integrated circuits can be divided into small-scale integrated circuits (SSI), medium scale integrated circuits (MSI), large-scale integrated circuits (LSI), very large integrated circuits (VLSI), and large integrated circuits (ULSI) according to their scale.

(4) Classification according to different conductive types

          According to the conductive type, integrated circuits can be divided into bipolar integrated circuits and unipolar integrated circuits.

          Bipolar integrated circuits have complex fabrication process and high power consumption. Representative integrated circuits include TTL, ECL, HTL, LST-TL, STTL, etc. Monopole integrated circuits have simple manufacturing process, low power consumption, and are easy to manufacture large-scale integrated circuits, representing CMOS, NMOS, PMOS and other types of integrated circuits.

（5） Classification by use

          Integrated circuits can be divided into TV integrated circuits according to their applications. Audio integrated circuit, optical disc integrated circuit, video integrated circuit, computer (microcomputer) integrated circuit, electronic piano integrated circuit, communication integrated circuit, camera integrated circuit, remote control integrated circuit, language integrated circuit, alarm integrated circuit and various special integrated circuits.

          Integrated circuits for TV include line and field scanning integrated circuits, intermediate amplifier integrated circuits, audio integrated circuits, color decoding integrated circuits, AV/TV conversion integrated circuits, switching power integrated circuits, remote control integrated circuits, liyin decoding integrated circuits, painting processing integrated circuits, microprocessor (CPU) integrated circuits, storage integrated circuits, etc.

          The integrated circuit includes audio AM/FM high and intermediate frequency circuit, stereo decoding circuit, audio pre amplifier circuit, audio operational amplifier integrated circuit, audio power amplifier integrated circuit, surround sound processing integrated circuit, level driving integrated circuit, electronic volume control integrated circuit, delay reverberation integrated circuit, electronic switch integrated circuit, etc.

          Integrated circuit system control integrated circuit, video coding integrated circuit, MPEG decoding integrated circuit, audio signal processing integrated circuit, audio effect integrated circuit RF signal processing integrated circuit, digital signal processing integrated circuit, servo integrated circuit, motor driving integrated circuit, etc.

          Integrated circuits include system control integrated circuit, servo integrated circuit, drive integrated circuit, audio processing integrated circuit and video processing integrated circuit.