低功耗技术及其在复费率电能表中的应用

The Low Power Technique and Its Applications in MultiRate Power Meters

针对目前国内厂家生产的复费率电能表中普遍存在的电池失压现象，对以超级电容替代电池的方案进行了研究。结合当今低功耗领域内的几项技术，重点解决了备用状态下时钟电路的低功耗问题，实现了电容电压下降至２．５Ｖ时电流消耗低于３００ｎＡ的要求。

Several low power techniques are discussed,in order to realize the low power operation of clock circuit and the supplyswitching control circuitA low power circuit for a multirate power meter has been designed,in which the super capacitor is adopted as standby power supply to avoid data loss resulted from battery invalidation and breakdown of power linesThe design of the low power circuit and its simulation are described