{"title":"用于电阻抗断层扫描的浮动电压控制电流源","authors":"H. Hong, M. Rahal, A. Demosthenous, R. Bayford","doi":"10.1109/ECCTD.2007.4529573","DOIUrl":null,"url":null,"abstract":"The design of a current source for wideband electrical impedance tomography medical instrumentation is a challenging task. This paper describes two simple OTA-based floating voltage-controlled current sources (VCCSs) for this application. Both designs are suitable for VLSI implementation and overcome the drawbacks of existing opamp-based discrete VCCS designs. The floating VCCSs are designed to drive loads of 100 Omega to 2 kOmega with current amplitudes of up to 500 muA. The working frequency band is between 100 Hz to 1 MHz. Simulated results using a 0.35-mum CMOS process technology are presented to show the operation of the circuits.","PeriodicalId":445822,"journal":{"name":"2007 18th European Conference on Circuit Theory and Design","volume":"72 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2007-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"21","resultStr":"{\"title\":\"Floating voltage-controlled current sources for electrical impedance tomography\",\"authors\":\"H. Hong, M. Rahal, A. Demosthenous, R. Bayford\",\"doi\":\"10.1109/ECCTD.2007.4529573\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The design of a current source for wideband electrical impedance tomography medical instrumentation is a challenging task. This paper describes two simple OTA-based floating voltage-controlled current sources (VCCSs) for this application. Both designs are suitable for VLSI implementation and overcome the drawbacks of existing opamp-based discrete VCCS designs. The floating VCCSs are designed to drive loads of 100 Omega to 2 kOmega with current amplitudes of up to 500 muA. The working frequency band is between 100 Hz to 1 MHz. Simulated results using a 0.35-mum CMOS process technology are presented to show the operation of the circuits.\",\"PeriodicalId\":445822,\"journal\":{\"name\":\"2007 18th European Conference on Circuit Theory and Design\",\"volume\":\"72 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2007-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"21\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2007 18th European Conference on Circuit Theory and Design\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ECCTD.2007.4529573\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2007 18th European Conference on Circuit Theory and Design","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ECCTD.2007.4529573","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 21
摘要
宽带电阻抗断层成像医疗仪器的电流源设计是一项具有挑战性的任务。本文介绍了两种简单的基于ota的浮动压控电流源(VCCSs)。这两种设计都适合VLSI实现，克服了现有基于运算放大器的离散VCCS设计的缺点。浮动vccs设计用于驱动100 ω至2 kω的负载，电流幅值高达500 muA。工作频段为100hz ~ 1mhz。采用0.35 μ m CMOS工艺技术，给出了电路的仿真结果。
Floating voltage-controlled current sources for electrical impedance tomography
The design of a current source for wideband electrical impedance tomography medical instrumentation is a challenging task. This paper describes two simple OTA-based floating voltage-controlled current sources (VCCSs) for this application. Both designs are suitable for VLSI implementation and overcome the drawbacks of existing opamp-based discrete VCCS designs. The floating VCCSs are designed to drive loads of 100 Omega to 2 kOmega with current amplitudes of up to 500 muA. The working frequency band is between 100 Hz to 1 MHz. Simulated results using a 0.35-mum CMOS process technology are presented to show the operation of the circuits.
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