How to improve your PCB wiring skills? A very important way is to see if you can ask questions and answer them. Or, we can grow from the questions and answers of others.

Answer: One way to improve PCB wiring skills is to conduct impedance simulation calculations for 300MHz signals, including line width and distance between the line and the ground. Determining the size of the current line width is crucial for power lines. In a mixed signal PCB, it is important to use the whole plane instead of just the “line” to minimize loop resistance and ensure a complete plane below the signal line.

Answer: For high-speed PCBs, it is recommended to drill fewer holes and increase the signal layer to minimize the need for additional holes.

Answer: Some key considerations for improving PCB wiring skills include: 1) Impedance matching of signal lines; 2) Spatial isolation from other signal lines; 3) Using differential lines for digital high frequency signals.

Answer: The problem of equilength can be solved by using serpentine lines, and most PCB software now has the capability to automatically implement equilength lines.

Answer: When sending a sinusoidal signal, the length difference should be equal to half of its wavelength, and the phase difference should be 180 degrees for the two signals to cancel out completely. The signal line difference must be less than this value.

Answer: Serpentine wiring serves various purposes in different applications: (1) On computer boards, it mainly acts as a filtering inductance and helps with impedance matching, improving the circuit’s anti-interference ability. It is commonly used in clock signals such as PCI-CLK, AGPCIK, IDE, and DIMM signal lines. (2) In general PCBs, it can also function as the inductance coil of a radio antenna. For example, it is used as an inductor in a 2.4G interphone. (3) In high-speed digital PCB boards, equiline length is crucial to maintain delay differences within an acceptable range and ensure valid data reading by the system in the same cycle (misreading may occur if the delay difference exceeds one clock cycle). (4) Serpentine routing can act as an LC filter with distributed parameters in special circuits.

Answer: Wiring should not be excessively long but rather symmetrical, as asymmetry or a significant difference can lead to delay and logic errors.

Answer: It is important to ground the digital ground and the analog ground at a single point to prevent digital backflow from interfering with the analog circuit.
Please enable JavaScript in your browser to complete this form.

Quick Quote

Info
Click or drag a file to this area to upload.
send me gerber or pcb file,format:7z,rar,zip,pdf