设计 0.9-2.6pW 0.1-0.25V 22nm 2 位电源数字转换器使用始终激活的电源控制振荡器和电源相关激活缓冲器用于生物燃料电池供电和感应的带时间戳的生物记录.pdf

1、12024 IEEE Nordic Circuits and Systems Conference Transceiver Building Blocks-3A 0.9-2.6pW 0.1-0.25V 22nm 2-bit Supply-to-Digital Converter Using Always-Activated Supply-Controlled Oscillator and Supply-Dependent Activation Buffers for Bio-Fuel-Cell-Powered-and-Sensed Time-Stamped Bio-RecordingHiroa

2、ki Kitaike,Masaharu Inada,Mitsuru Terauchi,Hironori Tagawa,Ryosuke Nagai,Shufan Xu,Ruilin Zhang,Kunyang Liu,and Kiichi NiitsuKyoto University,Japan1ASP-DAC 2025 University Design Contest 2F-162ASP-DAC 2025 University Design Contest 2F-16IntroductionMotivations of developing new converter Sensed-data

3、-to-digital conversion is needed in IoT sensor In some IoT devices,difficult to drive existing converters due to power limitation11111111Input supply voltageVIN TimeOutput freq&2bit Code01010010101001010011111111101010Stored to on-chip memoryFreq.VINOscillatorSDCBio-fuel-cell1 A.F.Yeknami,ISSCC2018.

4、2 K.Hayashi,BioCAS 2018.3 A.Tanaka,BioCAS2023.4 A.Kobayashi,TBioCAS2019:1152.5 A.Kobayashi,BioCAS2019.Contact lens health-care device 1-5The output voltage of the cell provides information on blood glucose levels3ASP-DAC 2025 University Design Contest 2F-16IntroductionMotivations of developing new c

5、onverter Convert voltage of bio-fuel-cell to digital Use the supply voltage as sensed-data as well as circuit voltage source since couldnt access to stable voltage source 1 input/1 outputDifferent from ordinary AD converterSupply-to-digital converterSupply voltageVIN TimeVDDDigital code01 00 11 104A

6、SP-DAC 2025 University Design Contest 2F-16IntroductionPerformance RequirementsOperational voltage VPower log WBio-fuel-cell budget100p0.374180n132.8n0.5251 A.F.Yeknami et al.,ISSCC 2018.4 A.Kobayashi et al.,TBioCAS 2019.8S.Arata,JJAP 2019.Existing SDCs are insufficient in terms of operational volta