功耗问题正日益变成VLSI系统实现的一个限制因素。对便携式应用来说，其主要原因在于电池寿命，对固定应用则在于最高工作温度。由于电子系统设计的复杂度在日益提高，导致系统的功耗得到其主要功耗成分。其次，以该主要功耗成分数学表达式为依据，突出实现SoC低功耗设计的各种级别层次的不同方法。-VLSI power problems are increasingly becoming a limiting factor in system implementation. For portable appli

Sources of noise generation are pervasive in contemporary industrial applications. Unwanted noise presents one of the major problems in measuring power or protecting circuits in such an environment. Knowing the characteristics and understanding t