{"title":"High Linearity Dynamic Feedback Darlington Amplifier","authors":"K. Kobayashi","doi":"10.1109/CSICS07.2007.53","DOIUrl":null,"url":null,"abstract":"This paper reports on a novel InGaP HBT Darlington RF amplifier which employs dynamic feedback linearization in order to improve IP3 and P1dB compression. The dynamic feedback amplifier obtains 20 dB gain, a 0.05-4 GHz BW, a P1dB and IP3 of 21.2 dBm and 40 dBm, respectively at 2 GHz. Compared to a conventional Darlington feedback design using equivalent quiescent bias of 5V-30mA, the dynamic feedback Darlington achieved an improvement of 7.5 dB in P1dB and 11 dB in IP3. A record IP3/Pdc ratio linearity figure of merit (LFOM) of 55.4:1 and 26.9:1 were obtained at 850 MHz and 1.95 GHz. These results are believed to be the best IP3 LFOM results reported for a 5V wide band Darlington feedback amplifier.","PeriodicalId":370697,"journal":{"name":"2007 IEEE Compound Semiconductor Integrated Circuits Symposium","volume":"4 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2007-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2007 IEEE Compound Semiconductor Integrated Circuits Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CSICS07.2007.53","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 7
Abstract
This paper reports on a novel InGaP HBT Darlington RF amplifier which employs dynamic feedback linearization in order to improve IP3 and P1dB compression. The dynamic feedback amplifier obtains 20 dB gain, a 0.05-4 GHz BW, a P1dB and IP3 of 21.2 dBm and 40 dBm, respectively at 2 GHz. Compared to a conventional Darlington feedback design using equivalent quiescent bias of 5V-30mA, the dynamic feedback Darlington achieved an improvement of 7.5 dB in P1dB and 11 dB in IP3. A record IP3/Pdc ratio linearity figure of merit (LFOM) of 55.4:1 and 26.9:1 were obtained at 850 MHz and 1.95 GHz. These results are believed to be the best IP3 LFOM results reported for a 5V wide band Darlington feedback amplifier.
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