{"title":"High-Efficiency Modulation System","authors":"R. Dome","doi":"10.1109/JRPROC.1938.228495","DOIUrl":null,"url":null,"abstract":"A descriptive and mathematical treatment is given of a means for obtaining modulated radio-frequency power with good conversion efficiency from the usual direct-current source. The method employed is to modify the load line on a saturated radio-frequency amplifier to take care of positive peaks and to grid modulate the amplifier for negative peaks. Load modification is accomplished by absorption and in this system the absorbed power is not dissipated in heat but is returned to the direct-current source for the power-amplifier tube and thereby reduces the drain from the supply. This results in direct-current-to-carrier conversion efficiencics in the order of 50 to 60 per cent when average tubes are used.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"26 1","pages":"963-982"},"PeriodicalIF":0.0000,"publicationDate":"1938-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/JRPROC.1938.228495","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Institute of Radio Engineers","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/JRPROC.1938.228495","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
A descriptive and mathematical treatment is given of a means for obtaining modulated radio-frequency power with good conversion efficiency from the usual direct-current source. The method employed is to modify the load line on a saturated radio-frequency amplifier to take care of positive peaks and to grid modulate the amplifier for negative peaks. Load modification is accomplished by absorption and in this system the absorbed power is not dissipated in heat but is returned to the direct-current source for the power-amplifier tube and thereby reduces the drain from the supply. This results in direct-current-to-carrier conversion efficiencics in the order of 50 to 60 per cent when average tubes are used.
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
