{"title":"热开关squid的信号放大及信噪比改善","authors":"Andrew D Hibbs, Brian R Whitecotton","doi":"10.1016/S0964-1807(99)00002-2","DOIUrl":null,"url":null,"abstract":"<div><p><span><span>The response of the circulating screening current to applied magnetic flux in a variety of DC SQUIDs has been studied in a regime in which thermal noise induces rapid switching between the </span>internal flux states of the SQUID. We observe an unexpected jump of 10 dB to 25 dB in the amplitude and </span>signal to noise ratio (SNR) at the output of the SQUID in response to input signals of frequency below the knee of the switching spectrum. The magnitude of the gain in SNR has been measured as a function of both barrier height and energy difference between local minima of the SQUID energy potential revealing new features of SQUID behavior. A new analysis is put forth for the DC SQUID which is able to reproduce the key features of these observations.</p></div>","PeriodicalId":100110,"journal":{"name":"Applied Superconductivity","volume":"6 10","pages":"Pages 495-499"},"PeriodicalIF":0.0000,"publicationDate":"1999-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0964-1807(99)00002-2","citationCount":"5","resultStr":"{\"title\":\"Signal amplification and signal to noise ratio improvements in thermally switching SQUIDs\",\"authors\":\"Andrew D Hibbs, Brian R Whitecotton\",\"doi\":\"10.1016/S0964-1807(99)00002-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span><span>The response of the circulating screening current to applied magnetic flux in a variety of DC SQUIDs has been studied in a regime in which thermal noise induces rapid switching between the </span>internal flux states of the SQUID. We observe an unexpected jump of 10 dB to 25 dB in the amplitude and </span>signal to noise ratio (SNR) at the output of the SQUID in response to input signals of frequency below the knee of the switching spectrum. The magnitude of the gain in SNR has been measured as a function of both barrier height and energy difference between local minima of the SQUID energy potential revealing new features of SQUID behavior. A new analysis is put forth for the DC SQUID which is able to reproduce the key features of these observations.</p></div>\",\"PeriodicalId\":100110,\"journal\":{\"name\":\"Applied Superconductivity\",\"volume\":\"6 10\",\"pages\":\"Pages 495-499\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1999-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S0964-1807(99)00002-2\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Superconductivity\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0964180799000022\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Superconductivity","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0964180799000022","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Signal amplification and signal to noise ratio improvements in thermally switching SQUIDs
The response of the circulating screening current to applied magnetic flux in a variety of DC SQUIDs has been studied in a regime in which thermal noise induces rapid switching between the internal flux states of the SQUID. We observe an unexpected jump of 10 dB to 25 dB in the amplitude and signal to noise ratio (SNR) at the output of the SQUID in response to input signals of frequency below the knee of the switching spectrum. The magnitude of the gain in SNR has been measured as a function of both barrier height and energy difference between local minima of the SQUID energy potential revealing new features of SQUID behavior. A new analysis is put forth for the DC SQUID which is able to reproduce the key features of these observations.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
