用于高性能分组处理的电力线滤波

　　用于高性能分组处理的电力线滤波

　　为了确保他们的安全，许多物联网（物联网）应用程序将需要防火墙和网关，以保护最敏感的设备。虽然最终节点将电池供电，这些防火墙将线路供电的大部分，为他们提供所需的能源运行必要的安全检查。这介绍了需要过滤电源线抗干扰。

　　为了应对日益增长的威胁，可以针对工业网络，防火墙所使用的数据过滤系统变得越来越复杂。设计人员不仅部署嵌入式处理器，但现场可编程门阵列（FPGA）执行深度包检查任务，能够清除可疑或恶意帧。这些先进的设备可以有多个电源轨送入它们分别提供核心逻辑阵列和I / O单元，以及时钟和内存接口通道的能量。

　　Power supply coupled noise can adversely affect the phase locked loops （PLLs） used to generate reliable clock pulses， for both on-chip circuits and serial interfaces， as well as the operation of logic. Because voltages are now at 1 V or below， there is very little tolerance for changes， with the result that circuits can prove to be highly sensitive to ripple and other forms of power-supply noise.

　　Power integrity is one of the key requirements for these designs， as interruptions to processing could slow down network performance while the system recovers. As the firewalls will often be situated outside data centers where filtered power is not readily available， and may be in close proximity to industrial equipment， they will need to incorporate their own power-supply noise rejection and filtering hardware.