Xingyu Chai, Xuanyi Wang, Guo-zhu Chen, Huakang Xia, Yinshui Xia, Ge Shi, Yidie Ye, Libo Qian
{"title":"A Broadband Piezoelectric Vibration Energy Harvesting System Based on Sensorless Direct Resonance Tuning Technique","authors":"Xingyu Chai, Xuanyi Wang, Guo-zhu Chen, Huakang Xia, Yinshui Xia, Ge Shi, Yidie Ye, Libo Qian","doi":"10.1587/elex.20.20230237","DOIUrl":"https://doi.org/10.1587/elex.20.20230237","url":null,"abstract":"","PeriodicalId":50387,"journal":{"name":"Ieice Electronics Express","volume":"47 1","pages":"20230237"},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67302260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wei Zou, Xinyu Zhang, Zhengwang Cheng, Mei Wang, Xinguo Ma
{"title":"Design and Analysis of a Low Phase Noise Low Power Ring-VCO","authors":"Wei Zou, Xinyu Zhang, Zhengwang Cheng, Mei Wang, Xinguo Ma","doi":"10.1587/elex.20.20230443","DOIUrl":"https://doi.org/10.1587/elex.20.20230443","url":null,"abstract":"A low phase noise low power ring voltage-controlled oscillator (Ring-VCO) is proposed for phase-locked loops (PLLs) in the 802.11ah communication protocol band. A three-stage Ring-VCO with dual-path structure delay cells is designed to meet the high performance requirements of Internet of Things. The main noise source in the differential delay cell can be eliminated at the differential output, thus reducing phase noise. Implemented in an old TSMC 0.18 µm CMOS process, the Ring-VCO achieves a tuning range of 343.56-974.56 MHz. The phase noise at 1 MHz offset varies from -116.28 to -108.74 dBc/Hz, and the current consumed is 2.27 mA.","PeriodicalId":50387,"journal":{"name":"Ieice Electronics Express","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135057014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A novel high-efficiency class-F voltage doubler rectifier for RF energy harvesting","authors":"Jian Liu, Jia Fan Chen, Jun Yi Li","doi":"10.1587/elex.20.20230429","DOIUrl":"https://doi.org/10.1587/elex.20.20230429","url":null,"abstract":"In this letter, a high-efficiency 2.45 GHz class-F voltage doubler rectifier is proposed for radio frequency energy harvesting (RFEH). In the proposed topology, two harmonic termination circuits are employed to shape the current waveform to half sine wave and voltage waveform to square wave by yielding short termination at even harmonics and open termination at odd harmonics. Compared with previous class-F voltage doubler rectifiers, the proposed rectifier achieves a higher RF-DC power conversion efficiency (PCE). To validate the proposed approach, a 2.45 GHz voltage doubler rectifier has been designed and implemented. The measurement results show that the peak RF-DC PCE is 76% with a 15.6 dBm input power range. In addition, the measured PCE is higher than 50% over the input power range from 2 to 18 dBm.","PeriodicalId":50387,"journal":{"name":"Ieice Electronics Express","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135561367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Efficient Design Methodology for Adaptive System Based on Direct Bitstream Evolution","authors":"Rui Yao, Jiawei Liang, Shubin Qian, Xufeng Zhang, Xiangrui Tian","doi":"10.1587/elex.20.20220518","DOIUrl":"https://doi.org/10.1587/elex.20.20220518","url":null,"abstract":"","PeriodicalId":50387,"journal":{"name":"Ieice Electronics Express","volume":"1 1","pages":"20220518"},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67300703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Calibration on X-band Radar Ranging with Laser Lidar","authors":"T. Uehara, S. Sayama, K. Tsuji","doi":"10.1587/elex.20.20230133","DOIUrl":"https://doi.org/10.1587/elex.20.20230133","url":null,"abstract":"","PeriodicalId":50387,"journal":{"name":"Ieice Electronics Express","volume":"1 1","pages":"20230133"},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67301013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}