PCB design on the "hole cover oil" and "hole open window" usage distinction
Many customers use pad(plug-in holes) to represent conductive holes, thus causing your conductive holes to open the window. Then please check your document design!
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How does Mentor's PCB design software handle differential line teams?
In the real world, in addition to considering signal quality, power source plane coupling (using adjacent ground planes to reduce AC impedance of the power plane) and layered symmetry are all factors to be considered.
In high speed PCB design, designers should consider from what aspects EMC, EMI rules?
When selecting the driver chip, in addition to ensuring that it basically matches the load and that the signal edge meets the requirements (generally, the clock is an effective signal along the clock), the time delay of the clock in the driver chip should
Can ground be added in the middle of differential signal line?
RC filtering is that the resistance itself consumes energy and has poor efficiency, and attention should be paid to the power that the selected resistance can withstand.
Questions and Answers about experience sharing in high frequency PCB circuit design
one is that two lines walk on the same layer (side-by-side), the other is that two lines walk on two adjacent layers (over-under). Generally, there are many ways to implement the former side-by-side.
Design performance requirements of PCB multi-substrate
In order to minimize the chance of PCB board distortion and obtain a flat finished board, the layering of the multi-substrate board should be kept symmetrical.
Multiple logic level threshold crossing errors
Causes of reflected signals: excessively long lines, unterminated transmission lines, excessive capacitance or inductance, and impedance mismatch.
High speed PCB design
The main reason of reflection signal: too long running; Transmission lines with unmatched terminations, excess capacitance or inductance, and impedance mismatches.
Design of controllability and electromagnetic compatibility of high speed PCB
There is a little bit of short circuiting between digital and analog, but note that there is only one connection point. There are also differences on the PCB, which is determined by the system design.
Methods of eliminating crosstalk in PCB design
The size of inductive crosstalk depends on the proximity of two loops, the size of the loop area, and the impedance of the load affected.
There are several ways to eliminate crosstalk in PCB design coupling
High speed devices are particularly sensitive to this, and will thus receive high speed false signals, while low speed devices will ignore such false signals.
Research on Anti-interference of high frequency PCB
The reflection of the signal back to the signal source will increase the system noise, making it more difficult for the receiver to distinguish the noise from the signal,
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