The almost-50-year history of microelectronics indicates that integration leads not only to smaller chip and system sizes but also to greater reliability, lower system power requirements, and plummeting cost/performance ratios. After the invention of the transistor, integrated circuit (IC) technology has progressed to reach system-on-a-chip (SoC) concepts. System-on-a-Chip (SoC) denotes a CMOS system consisting of both hardware and software implemented on a single chip. The SoC technology has appeared for two reasons: design productivity gap and time-to-market (TTM) need. The SoC design flow consists of many verification steps from a higher abstraction level to a lower abstraction level. Power analysis is an important process in the design of a SoC. As the performance and complexity of SoCs increase, there are various functions that must be implemented in the mixed-signal IC domain. These include circuits for data conversion, power management, communication interface, and clock generation.