{"title":"差分检测通道化谐振器滤波器","authors":"H. Fredricksen, L. Solie","doi":"10.1109/ULTSYM.1987.198939","DOIUrl":null,"url":null,"abstract":"Two resonators are connected together so they share the same input transducer but the output transducer for the second channel is 180° different in phase from the first. The result is zero output voltage for the direct transmission from input to output transducer. This helps achieve high out-of-band rejection. If the resonant frequencies of the two channels are now designed to be slightly different, the two channels will no longer cancel: and if the difference in frequency makes the crossover at the 3 dB pt, the two outputs will add to make a continuous, steeply sided, pass band filter. Such a narrow-band filter has been made and various problems and their solutions are presented.","PeriodicalId":309261,"journal":{"name":"IEEE 1987 Ultrasonics Symposium","volume":"11 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Differentially Detected Channelized Resonator Filter\",\"authors\":\"H. Fredricksen, L. Solie\",\"doi\":\"10.1109/ULTSYM.1987.198939\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Two resonators are connected together so they share the same input transducer but the output transducer for the second channel is 180° different in phase from the first. The result is zero output voltage for the direct transmission from input to output transducer. This helps achieve high out-of-band rejection. If the resonant frequencies of the two channels are now designed to be slightly different, the two channels will no longer cancel: and if the difference in frequency makes the crossover at the 3 dB pt, the two outputs will add to make a continuous, steeply sided, pass band filter. Such a narrow-band filter has been made and various problems and their solutions are presented.\",\"PeriodicalId\":309261,\"journal\":{\"name\":\"IEEE 1987 Ultrasonics Symposium\",\"volume\":\"11 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE 1987 Ultrasonics Symposium\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ULTSYM.1987.198939\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE 1987 Ultrasonics Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ULTSYM.1987.198939","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Two resonators are connected together so they share the same input transducer but the output transducer for the second channel is 180° different in phase from the first. The result is zero output voltage for the direct transmission from input to output transducer. This helps achieve high out-of-band rejection. If the resonant frequencies of the two channels are now designed to be slightly different, the two channels will no longer cancel: and if the difference in frequency makes the crossover at the 3 dB pt, the two outputs will add to make a continuous, steeply sided, pass band filter. Such a narrow-band filter has been made and various problems and their solutions are presented.
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