The arrival of the intelligent age, not only brings convenience to people's lives, but also has a profound impact on all industries, so the PCB copy board, design put forward higher requirements, professional PCB copy board companies should continue to im
The adoption of high speed PCB design means constitutes the controllability of the design process, only controllable, is reliable, can also be successful!
The main reason of reflection signal: too long running; Transmission lines with unmatched terminations, excess capacitance or inductance, and impedance mismatches.
The generation of grooving can be summarized into the following two cases :1. Grooving caused by power/ground plane segmentation; 2.the through hole is too dense to form grooves.
Grounding should be added when necessary, two adjacent layers of wiring should be vertical to each other, parallel easy to produce parasitic coupling.
Multilayer circuit board, usually through the hole plate, first board, second board, second stack plate these several. Higher level such as three - level board, arbitrary layer interconnection board usually used very little.
unused gate circuits are often used for design improvements later, and they may be converted into circuits. So it is also important that they are tested from the start to ensure that their artifacts are reliable.
There are many aspects of PCB design that need to take into account the safe spacing. It is classified into two categories: one is electrical related safety spacing and the other is non-electrical related safety spacing.
It is best not to use electrolytic capacitors, electrolytic capacitors are two layers of thin film rolled up, this rolled up structure at high frequency performance as inductance, the best use of bile capacitors or polycarbonate gestation capacitors.
In the actual design, the frequency, power rate and gain should be considered comprehensively to decide whether to add shielding plate.
The diode junction capacitance forms high-frequency attenuation oscillation, and the equivalent series inductance of the filter capacitor weakens the function of the filter.
The configuration of decoupling capacitance can suppress the noise caused by load changes, which is a common practice in the reliability design of printed circuit boards.
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