{"title":"By Using Darlington Topology Improvement of In-Band Gain for the Log Domain Filters","authors":"R. Arslanalp, A. T. Tola","doi":"10.1109/SIU.2006.1659735","DOIUrl":null,"url":null,"abstract":"By using Darlington topology, an alternative circuit is proposed to overcome the in-band gain problem for the log domain circuits. This idea is applied to a third order elliptic filter synthesized in the log domain. Simulations are performed in order to compare the performances of ideal transistors with infinite forward gain, CBIC-R transistors and CBIC-R transistors connected in Darlington topology. The AC response of the Darlington connected transistors gives better performance in terms of in-band gain. THD and noise performances are also investigated. In addition, the circuit is driven by a signal at the filter's corner frequency, i.e. f=100 kHz, for the time domain analysis. The results are discussed","PeriodicalId":415037,"journal":{"name":"2006 IEEE 14th Signal Processing and Communications Applications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2006 IEEE 14th Signal Processing and Communications Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SIU.2006.1659735","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
By using Darlington topology, an alternative circuit is proposed to overcome the in-band gain problem for the log domain circuits. This idea is applied to a third order elliptic filter synthesized in the log domain. Simulations are performed in order to compare the performances of ideal transistors with infinite forward gain, CBIC-R transistors and CBIC-R transistors connected in Darlington topology. The AC response of the Darlington connected transistors gives better performance in terms of in-band gain. THD and noise performances are also investigated. In addition, the circuit is driven by a signal at the filter's corner frequency, i.e. f=100 kHz, for the time domain analysis. The results are discussed
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