In all electronic devices, the layout of the components should consider the components of the components, and easy to test, the mechanical dimensions of the board, the position of the socket, etc. also need to be carefully considered.
The elemental arrangement is reasonable is the basic premise of designing high quality PCB. Today we are talking about how the PCB circuit board is designed and layout? What do he have a reference factor?
Installation
Refers to a series of basic applications in the specific application of the board, housing, slot, and spatial interference, short circuit, etc., and make the specified connector in the chassis or housing in the specified position of the chassis or housing. Require.
2.
The board should be able to withstand the various external forces and vibrations of installation and work. For this circuit board, the circuit board should have a reasonable shape, and the positions of various holes (screw holes, shaped holes) on the board are reasonably arranged. The general hole is at least larger than the diameter of the hole and the edge distance. At the same time, pay attention to the thinnest cross section of the plates caused by the shaped wells should also have sufficient flexural strength. The connector of the board directly "stretch" out of the equipment housing is particularly reasonable to ensure long-term use of reliability.
3. Heat
For high power, severe devices, in addition to ensuring heat dissipation conditions, pay attention to place in place. Especially in the precise simulation system, it is necessary to pay special attention to the adverse effects of temperature fields generated by these devices on fragile pre-magnifying circuits. The general power is very large, should be made separately into a module and takes a certain thermal isolation measure with the signal processing circuit.
4. Signal
The most important factor in the interference of the signal in the PCB layout design. Several most basic aspects: weak signal circuits are separated from the strong signal circuit; the AC portion is separated from the DC part; the high frequency portion is separated from the low frequency portion; pay attention to the direction of the signal line; the arrangement of the ground wire; appropriate shielding, filter Waiting for measures. These are a lot of discharging, which is no longer repeated.
5. Beautiful
Not only should I consider the neat and orderly placement of the component, but also consider the beautiful and smooth way. Since the general foreign party sometimes emphasizes the former, in order to evaluate the design of the circuit design, for the image of the product, the former is prioritized when performance requirements are not harsh. However, in high performance occasions, if the double panel has to be used, and the board is also packaged inside, it will be prioritized to emphasize the beauty of the trace.
In summary, the PCB circuit board will take into account various factors in the design to fit the design requirements of our line to create a high-precision component channel set plate.
(Disclaimer: This article is published by the original author. Some articles are derived from the network, and the media reprint, please indicate the source)