Surachoke ThanapitakMahidol University2018-11-232018-11-232015-08-17ECTI-CON 2015 - 2015 12th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology. (2015)2-s2.0-84956991441https://repository.li.mahidol.ac.th/handle/20.500.14594/35802© 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.Mahidol UniversityComputer ScienceEngineeringConference PaperSCOPUS10.1109/ECTICon.2015.7207022