A 34-mV Startup Ring Oscillator Using Stacked Body Bias Inverters for Extremely Low-Voltage Thermoelectric Energy Harvesting
A 34-mV Startup Ring Oscillator Using Stacked Body Bias Inverters for Extremely Low-Voltage Thermoelectric Energy Harvesting
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DOI：
10.1109/newcas49341.2020.9159838
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发表时间：
2020-06
期刊：
影响因子：
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通讯作者：
Masaya Nishi;Kaori Matsumoto;N. Kuroki;M. Numa;Hikaru Sebe;R. Matsuzuka;O. Maida;D. Kanemoto;T. Hirose
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文献类型：
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作者：
Masaya Nishi;Kaori Matsumoto;N. Kuroki;M. Numa;Hikaru Sebe;R. Matsuzuka;O. Maida;D. Kanemoto;T. Hirose
提出了一种用于极低电压温差发电机组的环形振荡器。ROSC由专用的低压堆叠体偏置逆变器(SBBI)组成，它是在传统的自偏置逆变器(SBI)和堆叠式逆变器(SI)的基础上组成的。所提出的SBBI利用了SBI和SI的优点，在极低的电源电压$(V{\mathm{D}\mathm{D}})$下振荡。采用层叠式和反馈式逆变器，通过控制主逆变器的电源电压和体偏置电压，改善和提高了所提出的SBBI的电压增益。采用标准0.18$\mathm{m}$cmos工艺和深N势垒选项的模拟结果表明，我们所提出的ROSC可以在34 mV的极低电压下振荡，并从50 mV的输入$V{\mathm{D}\mathm{D}$产生电压摆幅为88%的时钟脉冲。
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.