市场对高性能和新特色产品的持续需求给便携设备的设计人员出了种种难题。在许多情况下，设计已达到所允许功耗的极限。计算机和电话用户往往不愿使用电池寿命太短的产品。所以，最佳的解决方案是降低电路的功耗──从微处理器开始，它是系统的核心并且消耗的功率最大。通常， The continuing need for high performance and new specialty products in the market poses a challenge for designers of portable devices. In many cases, the design has reached its limit of power dissipation. Computer and telephone users are often reluctant to use products with short battery life. Therefore, the best solution is to reduce the power consumption of the circuit ─ ─ from the microprocessor, it is the core of the system and consume the most power. usually,