{"title":"无线通信功率放大器的效率和线性度改进","authors":"P. Asbeck, P.F. Chen, L. Larson","doi":"10.1109/GAAS.1998.722610","DOIUrl":null,"url":null,"abstract":"A key issue limiting power efficiency in wireless communication power amplifiers is the variation in signal level that must be accommodated. This paper discusses the importance of and techniques for varying the amplifier DC current and power supply voltage as a function of signal level. A high speed DC-DC converter operating from a 3.3 V source, implemented with GaAs HBTs, is described. The efficiency of a 2 GHz power amplifier using the DC-DC converter is shown to increase by 40%, averaged over signal power variations characteristic of IS-95 CDMA systems.","PeriodicalId":288170,"journal":{"name":"GaAs IC Symposium. IEEE Gallium Arsenide Integrated Circuit Symposium. 20th Annual. Technical Digest 1998 (Cat. No.98CH36260)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"25","resultStr":"{\"title\":\"Efficiency and linearity improvement in power amplifiers for wireless communications\",\"authors\":\"P. Asbeck, P.F. Chen, L. Larson\",\"doi\":\"10.1109/GAAS.1998.722610\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A key issue limiting power efficiency in wireless communication power amplifiers is the variation in signal level that must be accommodated. This paper discusses the importance of and techniques for varying the amplifier DC current and power supply voltage as a function of signal level. A high speed DC-DC converter operating from a 3.3 V source, implemented with GaAs HBTs, is described. The efficiency of a 2 GHz power amplifier using the DC-DC converter is shown to increase by 40%, averaged over signal power variations characteristic of IS-95 CDMA systems.\",\"PeriodicalId\":288170,\"journal\":{\"name\":\"GaAs IC Symposium. IEEE Gallium Arsenide Integrated Circuit Symposium. 20th Annual. Technical Digest 1998 (Cat. No.98CH36260)\",\"volume\":\"11 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1998-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"25\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"GaAs IC Symposium. IEEE Gallium Arsenide Integrated Circuit Symposium. 20th Annual. Technical Digest 1998 (Cat. No.98CH36260)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/GAAS.1998.722610\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"GaAs IC Symposium. IEEE Gallium Arsenide Integrated Circuit Symposium. 20th Annual. Technical Digest 1998 (Cat. No.98CH36260)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/GAAS.1998.722610","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Efficiency and linearity improvement in power amplifiers for wireless communications
A key issue limiting power efficiency in wireless communication power amplifiers is the variation in signal level that must be accommodated. This paper discusses the importance of and techniques for varying the amplifier DC current and power supply voltage as a function of signal level. A high speed DC-DC converter operating from a 3.3 V source, implemented with GaAs HBTs, is described. The efficiency of a 2 GHz power amplifier using the DC-DC converter is shown to increase by 40%, averaged over signal power variations characteristic of IS-95 CDMA systems.
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