M. A. Maktoomi, R. K. Mishra, M. Siddiqi, M. Prem Pyari
{"title":"CDTA based logarithmic amplifier","authors":"M. A. Maktoomi, R. K. Mishra, M. Siddiqi, M. Prem Pyari","doi":"10.1109/ISPCC.2012.6224354","DOIUrl":null,"url":null,"abstract":"A logarithmic amplifier using current differencing trans-conductance amplifier (CDTA) is presented. Both current as well as voltage mode inputs are possible. Output can also be voltage or current. Owing to its current mode operation it consumes less power. Furthermore, the instability problem found in op-amp based logarithmic amplifiers due to the presence of an active element in the feedback loop is absent in the CDTA logarithmic amplifier. The simulation result confirms the logarithmic behavior with a very low-error. It also shows a good dynamic range.","PeriodicalId":437791,"journal":{"name":"2012 IEEE International Conference on Signal Processing, Computing and Control","volume":"35 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2012 IEEE International Conference on Signal Processing, Computing and Control","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISPCC.2012.6224354","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
A logarithmic amplifier using current differencing trans-conductance amplifier (CDTA) is presented. Both current as well as voltage mode inputs are possible. Output can also be voltage or current. Owing to its current mode operation it consumes less power. Furthermore, the instability problem found in op-amp based logarithmic amplifiers due to the presence of an active element in the feedback loop is absent in the CDTA logarithmic amplifier. The simulation result confirms the logarithmic behavior with a very low-error. It also shows a good dynamic range.
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