JSSC 2006第6期Other0.35μm/0.25μm CMOS

Piezoelectric Micro-Power Generation

研究压电微功率发电接口电路，提出新型同步整流器和倍压电路设计。

88%效率，输出功率2.5μW（100kΩ/10nF负载）

压电发电同步整流倍压电路功率效率CMOS工艺

▸创新点1：半波同步整流器与倍压电路的设计与实现，采用0.35μm CMOS工艺，实现了88%的高功率效率，输出功率超过2.5μW，显著提升了能量转换效率。

▸创新点2：全波同步整流器的设计与优化，采用0.25μm CMOS工艺，峰值效率达到86%，输出功率高达22μW，比被动全波整流器高出37%，显著提升了能量采集能力。

▸创新点3：被动全波整流器的设计与测试，采用0.25μm CMOS工艺，峰值效率为66%，输出功率为16μW，为低功耗应用提供了一种无需静态电流的解决方案。

Abstract

New power conversion circuits to interface to a piezoelectric micro-power generator have been fabricated and tested. Circuit designs and measurement results are presented for a half-wave synchronous rectiﬁer with voltage doubler, a full-wave synchronous rectiﬁer and a passive full-wave rectiﬁer circuit con- nected to the piezoelectric micro-power generator. The measured power efﬁciency of the synchronous rectiﬁer and voltage doubler circuit fabricated in a 0.35- m CMOS process is 88% and the output power exceeds 2.5 W with a 100-k /10, 100-nF load. The two full-wave rectiﬁers (passive and synchronous) were fabricated in a 0.25- m CMOS process. The measured peak power efﬁciency for the passive full-wave rectiﬁer circuit is 66% with a 220-k /10 load and supplies a peak output power of 16 W with a 68-k /10 load. Although the active full-wave synchronous rectiﬁer requires quiescent current for operation, it has a higher peak efﬁciency of 86% with an 82-k /10load, and also exhibits a higher peak power of 22 W with a 68-k/10load which is 37% higher than the passive full-wave rectiﬁer.