PCB布线出现直角对电路的影响(Influence of PCB wiring right angle on circuit)

1.正常走线的信号线在遇到直角时,线宽变成了直角的对角长度。线路的阻抗因为线宽的变化变得不再连续(锐角和钝角也一样),阻抗的不连续会带来信号的反射。

2.传输线直角形成的寄生电容,会减缓信号的上升时间。

3.直角处在高速信号传输时,相当于天线,会造成EMI干扰

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1. When the signal line of normal routing meets a right angle, < strong > line width < / strong > becomes the diagonal length of the right angle. The impedance of the line becomes discontinuous due to the change of line width (the same is true for acute angle and obtuse angle), and the discontinuity of impedance will bring the reflection of signal.

2. The < strong > parasitic capacitance < / strong > formed by the right angle of the transmission line will slow down the rise time of the signal.

3. When the right angle is in high-speed signal transmission, it is equivalent to antenna, which will cause < strong > EMI interference < / strong >.