Haizhun Wang , Yinshui Xia , Xiudeng Wang, Zhidong Chen
{"title":"A 40 mV cold-start circuit with bootstrap clock booster for thermoelectric energy harvesting","authors":"Haizhun Wang , Yinshui Xia , Xiudeng Wang, Zhidong Chen","doi":"10.1016/j.mejo.2024.106360","DOIUrl":null,"url":null,"abstract":"<div><p>In this paper, a cold-start circuit with bootstrap clock booster for thermoelectric energy harvesting is proposed. The relationship between enhancing the clock swing amplitude and lowering the input voltage for a cross-coupled charge pump (CCCP) is analyzed. Based on the existing one-shot start-up mechanism, a series-parallel bootstrap clock booster (SP-BCB) for boosting the clock amplitude is proposed to lower the cold start voltage. Besides, a dynamic threshold MOS (DTMOS) technique for dynamically changing the threshold voltage of MOS transistors is used to achieve better conduction and leakage current suppression. The complete circuit is simulated in a 0.18-μm CMOS process. The simulated results demonstrate that using DTMOS technique and enhancing the clock swing amplitude can contribute to lowering the input voltage. The SP-BCB-based CCCP can boost the input voltage from 40 mV to 668 mV for a 500 MΩ load in 100 m s, which meets the requirement for one-shot start-up mechanism, realizing 40-mV integrated cold start for thermoelectric energy harvesting (TEH).</p></div>","PeriodicalId":49818,"journal":{"name":"Microelectronics Journal","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microelectronics Journal","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S187923912400064X","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, a cold-start circuit with bootstrap clock booster for thermoelectric energy harvesting is proposed. The relationship between enhancing the clock swing amplitude and lowering the input voltage for a cross-coupled charge pump (CCCP) is analyzed. Based on the existing one-shot start-up mechanism, a series-parallel bootstrap clock booster (SP-BCB) for boosting the clock amplitude is proposed to lower the cold start voltage. Besides, a dynamic threshold MOS (DTMOS) technique for dynamically changing the threshold voltage of MOS transistors is used to achieve better conduction and leakage current suppression. The complete circuit is simulated in a 0.18-μm CMOS process. The simulated results demonstrate that using DTMOS technique and enhancing the clock swing amplitude can contribute to lowering the input voltage. The SP-BCB-based CCCP can boost the input voltage from 40 mV to 668 mV for a 500 MΩ load in 100 m s, which meets the requirement for one-shot start-up mechanism, realizing 40-mV integrated cold start for thermoelectric energy harvesting (TEH).
期刊介绍:
Published since 1969, the Microelectronics Journal is an international forum for the dissemination of research and applications of microelectronic systems, circuits, and emerging technologies. Papers published in the Microelectronics Journal have undergone peer review to ensure originality, relevance, and timeliness. The journal thus provides a worldwide, regular, and comprehensive update on microelectronic circuits and systems.
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