{"title":"A 50 MHz, 46 μW, 0.28% Accuracy, 67 ppm/°C Relaxation Oscillator in 40nm CMOS Process for Multichannel Integrated Biomedical Recording System","authors":"Wojciech Mrzyglod, P. Kmon","doi":"10.23919/mixdes55591.2022.9838079","DOIUrl":null,"url":null,"abstract":"This paper presents design of a high accuracy relaxation oscillator immune to the operating conditions and process variations. Presented oscillator is a part of multi-channel integrated system for biomedical recordings fabricated in the 40nm CMOS technology. By utilizing precision current reference source the 67 ppm/°C temperature coefficient in the _20°C to 120°C temperature range and low sensitivity to the supply voltage in the range of 1V to 1.2V were achieved. With the use of digitally trimmed capacitors the 0.28 % accuracy over process variations was also achieved. Additionally, to ensure self-sufficiency and reliable operation the oscillator was equipped with a power-on reset circuit.","PeriodicalId":356244,"journal":{"name":"2022 29th International Conference on Mixed Design of Integrated Circuits and System (MIXDES)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2022 29th International Conference on Mixed Design of Integrated Circuits and System (MIXDES)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.23919/mixdes55591.2022.9838079","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
This paper presents design of a high accuracy relaxation oscillator immune to the operating conditions and process variations. Presented oscillator is a part of multi-channel integrated system for biomedical recordings fabricated in the 40nm CMOS technology. By utilizing precision current reference source the 67 ppm/°C temperature coefficient in the _20°C to 120°C temperature range and low sensitivity to the supply voltage in the range of 1V to 1.2V were achieved. With the use of digitally trimmed capacitors the 0.28 % accuracy over process variations was also achieved. Additionally, to ensure self-sufficiency and reliable operation the oscillator was equipped with a power-on reset circuit.