1. The power plane plays a vital role in supporting the power circuit. Understanding the characteristics of the power circuit is essential for effective layout. The power supply circuit primarily consists of DI/DT and DV/DT circuits, each requiring specific considerations during layout.
For the DI/DT circuit, which experiences significant current changes over time, minimizing the circuit loop area is paramount. Conversely, the DV/DT circuit undergoes substantial voltage changes over time, making it susceptible to external interference. Consequently, the copper traces in this circuit’s loop should be kept narrow. While ensuring current capacity, minimizing copper trace width, and reducing overlapping areas between layers are essential considerations.
2. When designing the driving part of the circuit, minimizing the area of the entire driving loop is crucial. This minimization helps to mitigate interference and should position the driving part away from potential sources of interference while remaining close to the driving component.
3. Sampling signals require careful attention to prevent interference from other signals. Ideally, sampling signals should be acquired from different locations and provided with dedicated ground planes at their respective wiring points, thereby minimizing mutual interference.
