In the circuit,U represents the integrated block. The integrated block can be said to be the main core part of the components of the computer system, in addition to some analog signal processing integrated blocks that can be seen everywhere, such as CPU, RAM, ROM and south and north bridge chips and graphics card chips are integrated blocks. Q stands for transistor.
The integrated block and the commonly said integrated circuit are one concept, and the symbol of the integrated block in the circuit is \"IC\" or \"N\" or \"U\". Q stands for tripipe. The role of the transistor is to amplify or switch or adjust, it is a small number in the computer host, but the number of monitors and some peripherals is not very small.
It can be divided into PNP type and NPN type according to the different semiconductor substrate materials, and the transistor is two diodes combined together. The symbol of the triode in the circuit is \"VT\" or \"Q\" or \"V\".
Different components have different roles in different circuits. For example, resistance limited current, buck protection and other functions, diodes have rectification, single-phase conduction, DC resistance AC and other functions, capacitors have voltage regulation, filtering, power compensation, AC resistance DC and other functions, transistors have amplifier and controlled conduction role, relays have circuit switching and protection, isolation role