How to solve the crosstalk problem in PCB circuit board? The following instructions are given to you:
1. While the transformation rate along the low signal may fall to meet the design criteria, we should try our best to select the devices at a slow speed, usually when the device is selected, and to prevent the mixed use of different kinds of signals. Because of the potential crosstalk risk of the fast transformed signal to the slow transformed signal.
2, the use of shielding measures will lead to the increase of wiring, Circuit boards are an effective way to deal with crosstalk problems for high-speed signals. However, it is essential to block ground lines to reach the desired destination by increasing congestion in an otherwise limited wiring area. At the same time, the earth wire will increase the spread capacitance of the signal, increase the impedance of the transmission line and slow down the signal edge.
3. The reasonable setting of the layer and the wiring will reduce the parallel signal length. Reasonably set the wiring layer and the wiring spacing, shorten the distance between the signal layer and the plane layer, increase the signal line spacing, To reduce the length of parallel signal lines (within the critical length range), these measures can effectively reduce crosstalk.
4. It is also a good way to deal with crosstalk. 5. Impedance matching can also greatly reduce the amplitude of crosstalk. If the near or distal terminal impedance of transmission line matches with transmission line impedance.