线路板布线规则（Circuit board wiring rule）.docVIP

线路板布线规则（Circuit board wiring rule） Even if the processing PCB routing rules detailed 2007-09-18 08:441 power and ground in the PCB board wiring done are very good, but due to the interference of power and ground the inconsiderate and cause, will make the product performance Decline, and sometimes even affect the success rate of the product. Therefore, the wiring of the electric power and ground wire should be taken seriously, and the noise interference generated by the electric wire and ground wire will be reduced to a minimum Product quality. For all engineers engaged in the design of electronic products, the reasons for the noise between the ground wire and the power line are understood As stated: it is well known that a coupling capacitor is added between the power source and the ground wire. Try to broaden the power and ground width, preferably the ground wire than the power line width, and their relationship is: Earth wire power line signal line, usually signal width is: 0.2 ~ 0.3mm, the most fine width can reach 0.05 ~ 0.07mm, the power line is 1.2 ~ 2.5 mm, the PCB of digital circuit can A circuit consisting of wide ground wires that makes up a ground grid for use (where the analog circuit cannot be used) uses a large copper layer as ground wire and is not used on the printed board The ground is connected to the ground as a ground. Or make a multilayer board, The power supply and ground wire occupy one floor each. 2, the digital circuit and analog circuit common treatment, there are many PCB is no longer a single function circuit (digital or analog circuit), but by digital circuits and analog circuits mixed Constitutive. Therefore, in wiring, it is necessary to consider the interference between them, especially the noise interference on the ground. The high frequency of digital circuits, the sensitivity of analog circuits Strong, the signal line, the high frequency signal line as far as possible from the circuit simulation of sensitivity, to the ground, the