Printed Circuit Board Layout

Dated:2018-02-09      Popularity:1188


Simply speaking, PCB layout just means placing components on a printed circuit board reasonably. At this time if the preparatory work is done, then you can generate a network table on the schematic (Design-> Create Netlist), after that, import the network table (Design-> Load Nets) on the PCB. General layout principles are as follows:

1.Classify according to the electrical performance, generally divided into: digital circuit area (that is, afraid of interference, but also produce interference), analog circuit area (afraid of interference), and power-driven area (sources of interference);

2.Complete the same function of the circuit, and put them as close as possible, then adjust the components to ensure the most concise connection;

3.For high-quality components, the installation location and installation strength should be considered; heating components should be placed separately from the temperature-sensitive components, if necessary, should also consider the heat convection measures;

4.Keep the I/O driver as close to the printed circuit board as possible, and near the lead-out connector;

5.Clock generator (such as crystal or clock oscillator) should be put as close as possible to the device that uses the clock;

6.A decoupling capacitor (usually a high-frequency performance monolithic capacitor) should be put between each integrated circuit power input pin and ground; if the circuit board space is tight, a tantalum capacitor can be placed around several integrated circuits;

7.A discharge diode (1N4148 is ok) should be put around the relay coil;

8.Components on PCB layout should be balanced, dense and orderly.

PCB Layout  

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