The principle of the board - it is so capricious

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Guide: The circuit board believes that everyone is familiar, but you know the principle of the board ? If you don't know, just look at it and enrich your knowledge base~~~

1. Circuit Board Principles - Introduction

Printed Circuit Board ( PCB ), also known as circuit board, PCB board, aluminum substrate, high frequency board, ultra-thin circuit board, ultra-thin circuit board, printing (copper etching technology) circuit board, etc., is important. The electronic component is a support for the electronic component and is a provider of the circuit connection of the electronic component. The traditional circuit board uses the method of printing etch resist to make the circuit and the surface of the circuit, so it is called a printed circuit board or a printed circuit board. Due to the ever-increasing miniaturization and refinement of electronic products, most of the current boards use adhesive etch resists (filming or coating), and after exposure and development, the boards are etched.

2. Circuit board principle - structure

The board is mainly composed of pads, vias, mounting holes, wires, components, connectors, pads, electrical boundaries, and the like. Common laminar structures include Single Layer PCB , Double Layer PCB, and Multi Layer PCB. The main functions of each component are as follows:

Pad: A metal hole used to solder the component leads.

Via: There are metal vias and non-metal vias, where metal vias are used to connect the component leads between layers.

Mounting hole: used to fix the board.

Wire: An electrical network copper film used to connect component leads.

Connector: A component used to connect between boards.

Filling: Copper for the grounding network can effectively reduce the impedance.

Electrical Boundary: Used to determine the size of the board, and all components on the board must not exceed this boundary.

3. Circuit board principle

The working principle of the circuit board is to isolate the surface copper foil conductive layer by using the board-based insulating material, so that the current flows along various pre-designed routes in various components such as work, amplification, attenuation, modulation, demodulation, and coding. And other functions.

On the most basic PCB, the parts are concentrated on one side and the wires are concentrated on the other side. Since the wire only appears on one side, this PCB is called a single panel. Multilayer boards, with multiple layers of wires, must have appropriate electrical connections between the two layers. The bridge between such circuits is called a via. The basic design process of a board can be divided into the following four steps:

(1) The design of the circuit schematic diagram---The design of the circuit schematic diagram is mainly to draw the schematic diagram by using the schematic editor of Protel DXP.

(2) Generate network report---Network report is a report showing the relationship between circuit principle and each component. It is the bridge and link connecting the circuit schematic design and circuit board design, and the network report through the circuit schematic diagram. The connection between components can be quickly found to facilitate the design of the back PCB.

(3) Design of printed circuit board---The design of printed circuit board is what we usually call PCB design, which is the final form of circuit schematic conversion. The design of this part is larger than the design of circuit schematic. Difficulty, we can use the powerful design features of Protel DXP to complete this part of the design.

(4) Generate printed circuit board report---After the printed circuit board design is completed, various reports need to be generated, such as generating pin report, circuit board information report, network status report, etc., and finally printing the printed circuit diagram.

The principle of the circuit board is introduced here. Here are a few articles related to it. If you are interested, please come and see it~~~~~

1. PCB Design Cheats: teach you how to quickly make a board

2. Circuit board madman's town house treasure

3. How to make a homemade circuit board

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