低电压高效整流器在能量收集系统中的应用

摘要

提出了一种应用在能量收集系统中的低电压CMOS全波整流器.通过引入比较器控制开关,在0.18微米工艺下,最低工作电压可以小于0.7V.由于只使用一个比较器,大大缩减了芯片成本.与相关研究成果比较,设计采用非对称结构,电压转换效率高达93％,系统能量效率达到83％.%This paper presents a low voltage CMOS full-wave rectifier for energy harvesting system. By using a simple comparator-controlled switch, the lowest input voltage amplitude can be small to 0.7 V when using a standard CMOS 0. 18μm process. With only one comparator, the proposed design dramatically reduces the production cost. In combination with asymmetrical transistor scale, the proposed rectifier can achieve a maximum peak voltage conversion efficiency of more than 93% and power efficiency near to 87%.