{"title":"Improved closed-form expressions for S-parameters of BJTs using modified Gummel-Poon model","authors":"A. Nadeem, W. Eisenstadt","doi":"10.1109/INMIC.2003.1416697","DOIUrl":null,"url":null,"abstract":"Noticeable differences particularly in phase were observed when closed-form expressions reported earlier were employed to predict small-signal S-parameters for the packaged devices. With improved close-form expressions presented in this paper, the overall situation both in terms of magnitude and phase has improved significantly by adding extrinsic base-to-collector capacitance. The difference in magnitude between measured and predicted using a modified Gummel-Poon model has reduced from 4 dB to less than 2 dB. The error between measure and calculated phase is no more than 8 degrees at any point whereas the expressions based on the intrinsic model greatly underestimated the phase for packaged devices","PeriodicalId":253329,"journal":{"name":"7th International Multi Topic Conference, 2003. INMIC 2003.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2003-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"7th International Multi Topic Conference, 2003. INMIC 2003.","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/INMIC.2003.1416697","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Noticeable differences particularly in phase were observed when closed-form expressions reported earlier were employed to predict small-signal S-parameters for the packaged devices. With improved close-form expressions presented in this paper, the overall situation both in terms of magnitude and phase has improved significantly by adding extrinsic base-to-collector capacitance. The difference in magnitude between measured and predicted using a modified Gummel-Poon model has reduced from 4 dB to less than 2 dB. The error between measure and calculated phase is no more than 8 degrees at any point whereas the expressions based on the intrinsic model greatly underestimated the phase for packaged devices