论文部分内容阅读
锁定噪声——不让它逃跑问题:如何防止开关电源的噪声破坏电路性能呢?回答:非常难——但可以做到。可以想象,开关电源在本质上来说是最嘈杂的电路。电源的大电流在高频下以极快的dl/dt开启、关断,这将不可避免的出现大而快的瞬态电压与瞬态电流。预防系统中的敏感电路受到干扰的唯一方法是让瞬态电流和瞬态电压保持在转换器内部。我们无法阻止内部的大电流切换。
Locking Noise - Do Not Let It Escape Problem: How to Prevent Switching Power Supply Noise from Breaking Circuit Performance? Answer: It’s very hard - but it can be done. As you can imagine, switching power supply is by far the most noisy circuit. The high current of the power supply is turned on and off at very fast dl / dt at high frequencies, which will inevitably cause large and fast transient voltages and transient currents. The only way to prevent sensitive circuits in the system from being disturbed is to keep the transient current and transient voltages inside the converter. We can not stop the internal high current switching.