Ghoor, Ikraam SBezuidenhout, Petrone HJoubert, Trudi H2018-08-222018-08-222017-09Ghoor, IS, Bezuidenhut PH, Joubert TH. 2017. High-resolution capacitance-frequency converter for biosensor applications. IEEE Africon 2017 Proceedings, 18-20 September 2017, V&A Waterfront, Cape Town, South Africa, 4pp.0277-786Xhttp://ieeexplore.ieee.org/document/8095563/http://hdl.handle.net/10204/10382Copyright: 2017 IEEE. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, kindly consult the publisher's website.This paper presents the design of a low-complexity, linear and sub-pF CMOS capacitance-frequency converter for reading out capacitive bacterial bio/sensors in an attempt to create a widespread bio/sensor readout module. The significant design objectives included a high resolution as well as an extensive dynamic range. The circuit was based on a method which outputs a digital frequency signal directly from a differential capacitance by the accumulation of charges produced by repetitive charge integration and charge preservation. A prototype was designed for manufacture using the 0.35 µm, 3.3V ams CMOS technology. At a 1 MHz clock speed, the results obtained for the designed converter were: (i) a power consumption of 1.37mW; (ii) a resolution of at least 5fF for sensitive capacitive transduction; (iii) an input dynamic range of at least 43.5 dB from a measurable capacitance value range of 5-750fF and (iv) a Pearson's coefficient of linearity of 0.99. Furthermore, a large-scale CFC was constructed with discrete IC's in order to verify the function of the CMOS design.enCapacitance to frequency converterBiosensorLinearReadout moduleCMOSHigh-resolutionConference PresentationGhoor, I. S., Bezuidenhout, P. H., & Joubert, T. H. (2017). High-resolution capacitance-frequency converter for biosensor applications. IEEE. http://hdl.handle.net/10204/10382Ghoor, Ikraam S, Petrone H Bezuidenhout, and Trudi H Joubert. "High-resolution capacitance-frequency converter for biosensor applications." (2017): http://hdl.handle.net/10204/10382Ghoor IS, Bezuidenhout PH, Joubert TH, High-resolution capacitance-frequency converter for biosensor applications; IEEE; 2017. http://hdl.handle.net/10204/10382 .TY - Conference Presentation AU - Ghoor, Ikraam S AU - Bezuidenhout, Petrone H AU - Joubert, Trudi H AB - This paper presents the design of a low-complexity, linear and sub-pF CMOS capacitance-frequency converter for reading out capacitive bacterial bio/sensors in an attempt to create a widespread bio/sensor readout module. The significant design objectives included a high resolution as well as an extensive dynamic range. The circuit was based on a method which outputs a digital frequency signal directly from a differential capacitance by the accumulation of charges produced by repetitive charge integration and charge preservation. A prototype was designed for manufacture using the 0.35 µm, 3.3V ams CMOS technology. At a 1 MHz clock speed, the results obtained for the designed converter were: (i) a power consumption of 1.37mW; (ii) a resolution of at least 5fF for sensitive capacitive transduction; (iii) an input dynamic range of at least 43.5 dB from a measurable capacitance value range of 5-750fF and (iv) a Pearson's coefficient of linearity of 0.99. Furthermore, a large-scale CFC was constructed with discrete IC's in order to verify the function of the CMOS design. DA - 2017-09 DB - ResearchSpace DP - CSIR KW - Capacitance to frequency converter KW - Biosensor KW - Linear KW - Readout module KW - CMOS KW - High-resolution LK - https://researchspace.csir.co.za PY - 2017 SM - 0277-786X T1 - High-resolution capacitance-frequency converter for biosensor applications TI - High-resolution capacitance-frequency converter for biosensor applications UR - http://hdl.handle.net/10204/10382 ER -