Pcb board design layout skills

In the layout of the PCB board design, the unit of the board should be analyzed and the layout design according to the function. When all the components of the circuit are arranged, the following principles should be met:

1. According to the circuit flow, arrange the position of each functional circuit unit to facilitate signal circulation, and keep the signal as consistent as possible.

 2. Center around the core components of each functional unit. The components should be evenly, integrally and compactly placed on the PCB board design to minimize and shorten the connection between the leads and components.

 3. For circuits operating at high frequencies, the distribution parameters between the components should be considered. In general, the circuit should be arranged in parallel as much as possible, which is not only beautiful, but also easy to install and mass-produce.

 Special components and layout design

Special components refer to key components of the high frequency portion, core components in the circuit, components susceptible to interference, high voltage components, high heat value components, and some foreign components. The location of these special components needs to be carefully analyzed and the layout conforms to the circuit function and production requirements. Improper placement of them can lead to circuit compatibility issues and signal integrity issues that can cause the PCB board design to fail.

When designing how to place special components, you should first consider the size of the PCB board design. When the design size of the PCB board is too large, the printed circuit will become longer, the impedance will increase, the drying resistance will be reduced, and the cost will increase. Too small, the heat is not good, and adjacent lines are susceptible to interference. After determining the design size of the PCB board, determine the swing position of the special part. Finally, all components of the circuit are laid out in functional units. The location of special components should generally conform to the following principles when laying out:

 1. Minimize the connection between high frequency components and minimize their distribution parameters and mutual electromagnetic interference. Components that are susceptible to interference should not be too close, and the inputs and outputs should be as far as possible.

 Some components or wires may have a high potential difference, so their distance should be increased to avoid accidental short circuits caused by discharge. High-voltage components should be kept out of reach of the hand.

 3. Parts weighing more than 15G can be fixed by brackets and then welded. Those heavy and hot parts should not be placed on the board, but should be placed on the back plane of the main unit and should be considered for heat dissipation. The thermal element should be kept away from the heating element.

 4. Layout of adjustable components such as potentiometer, adjustable induct or, variable capacitor and micro switch. The structural requirements of the entire wrench should be considered. When the structure allows, some commonly used switches should be placed where the hand is easily accessible. The layout of the components should be balanced and dense, not top-heavy.

 The success of a product depends on its internal quality. But considering the overall aesthetics, both are relatively perfect wrenches to be a successful product.