OTA-C differentiator for large time constant applications

Author

Thanapitak, Surachoke

Author_Institution

Dept. of Electr. Eng., Mahidol Univ., Nakhon Pathom, Thailand

fYear

2015

Firstpage

1

Lastpage

4

Abstract

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.

Keywords

CMOS integrated circuits; capacitors; current conveyors; low-power electronics; operational amplifiers; OTA-C structure; OTA-C voltage differentiator; biological signal processing; current conveyor topology; operational transconductance amplifier; pico farad range filter capacitor; power 4.8 nW; size 0.35 mum; standard CMOS process; time constant applications; voltage 1.2 V; voltage attenuator; Attenuators; CMOS integrated circuits; Capacitors; Chemicals; Noise; Transconductance; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2015 12th International Conference on

Conference_Location

Hua Hin

Type

conf

DOI

10.1109/ECTICon.2015.7207022

Filename

7207022