Masaya Nishi, Kaori Matsumoto, N. Kuroki, M. Numa, Hikaru Sebe, R. Matsuzuka, O. Maida, D. Kanemoto, T. Hirose
{"title":"A 34-mV Startup Ring Oscillator Using Stacked Body Bias Inverters for Extremely Low-Voltage Thermoelectric Energy Harvesting","authors":"Masaya Nishi, Kaori Matsumoto, N. Kuroki, M. Numa, Hikaru Sebe, R. Matsuzuka, O. Maida, D. Kanemoto, T. Hirose","doi":"10.1109/newcas49341.2020.9159838","DOIUrl":null,"url":null,"abstract":"A ring oscillator (ROSC) for extremely low-voltage thermoelectric energy generators is presented. The ROSC is composed of dedicated low-voltage stacked body bias inverters (SBBIs) that are based on the conventional self-bias inverter (SBI) and stacked inverter (SI). The proposed SBBI employs the advantages of both SBI and SI to oscillate at extremely low supply voltage $(V_{\\mathrm{D}\\mathrm{D}})$. The voltage gain $\\vert A_{\\mathrm{I}\\mathrm{N}\\mathrm{V}}\\vert$ of our proposed SBBI is improved and enhanced by controlling main inverter's supply $(V_{\\mathrm{D}\\mathrm{D}}$ and Gnd) and body-bias voltages, by using stacked and feedback inverters. Simulated results using a standard 0.18 $\\mu \\mathrm{m}$ CMOS process with deep N-well option showed that our proposed ROSC could oscillate at extremely low $V_{\\mathrm{D}\\mathrm{D}}$ of 34 mV and generate a clock pulse with a 88% voltage swing from an input $V_{\\mathrm{D}\\mathrm{D}}$ of 50 mV.","PeriodicalId":135163,"journal":{"name":"2020 18th IEEE International New Circuits and Systems Conference (NEWCAS)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2020 18th IEEE International New Circuits and Systems Conference (NEWCAS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/newcas49341.2020.9159838","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
A ring oscillator (ROSC) for extremely low-voltage thermoelectric energy generators is presented. The ROSC is composed of dedicated low-voltage stacked body bias inverters (SBBIs) that are based on the conventional self-bias inverter (SBI) and stacked inverter (SI). The proposed SBBI employs the advantages of both SBI and SI to oscillate at extremely low supply voltage $(V_{\mathrm{D}\mathrm{D}})$. The voltage gain $\vert A_{\mathrm{I}\mathrm{N}\mathrm{V}}\vert$ of our proposed SBBI is improved and enhanced by controlling main inverter's supply $(V_{\mathrm{D}\mathrm{D}}$ and Gnd) and body-bias voltages, by using stacked and feedback inverters. Simulated results using a standard 0.18 $\mu \mathrm{m}$ CMOS process with deep N-well option showed that our proposed ROSC could oscillate at extremely low $V_{\mathrm{D}\mathrm{D}}$ of 34 mV and generate a clock pulse with a 88% voltage swing from an input $V_{\mathrm{D}\mathrm{D}}$ of 50 mV.