source:Other information release time:2023-03-28 Hits: Popular:PCB Assembly company
1. Possible conditions to land low signal along the change rate of low signal edges
Satisfy the design standards and try to choose slower devices as possible, usually when the device is selected. And to prevent the mixed use of signals of different varieties, there is a potential risk of string disturbances due to rapid transformation signals.
2. Use shielding measures
Bagfields will cause increased wiring volume. Circuit boards provide a high -speed signal to provide a valid way to deal with the problem of stringing disturbances. but. Make the original limited wiring area more congested. In addition, the ground floor shielding to reach the expected destination line is critical, and it is generally less than twice the length of the signal changes along the length. At the same time, the ground wire will also increase the distribution capacitors of the signal, increase the impedance of the transmission line, and slow down the signal edges.
3. Reasonable setting layer and wiring
Reduce the length of parallel signal, and set the wiring layer and wiring spacing reasonably. Shorten the distance between the signal layer and the plane layer, increase the distance between the signal line, and reduce the measures of the parallel signal line (within the key length range) of these measures.
4. Set different wiring layers
And set the plane layer reasonably to set different wiring layers for signals of different rates. It is also a good way to deal with string disturbances.
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