Publication: OTA-C differentiator for large time constant applications
Issued Date
2015-08-17
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2-s2.0-84956991441
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Mahidol University
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SCOPUS
Bibliographic Citation
ECTI-CON 2015 - 2015 12th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology. (2015)
Suggested Citation
Surachoke Thanapitak OTA-C differentiator for large time constant applications. ECTI-CON 2015 - 2015 12th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology. (2015). doi:10.1109/ECTICon.2015.7207022 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/35802
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Title
OTA-C differentiator for large time constant applications
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Abstract
© 2015 IEEE. In this paper a voltage differentiator based on OTA-C structure is introduced. To maintain a large time constant for biological signal processing at pico farad range filter capacitor, the input voltage attenuator is applied to reduce the overall transconductance gain of this OTA. This OTA-C voltage differentiator is simulated on a standard CMOS 0.35μm process and operated at 1.2 V with 4.8 nW power consumption. On comparison with the previous work which utilised a current conveyor topology as a voltage differentiator, the OTA-C differentiator dramatically reduces the size of the total capacitance which is preferable for integrated circuit implementation.