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0. 4V, Low Power GmC Integrator And Bandpass Filter Design For EMG Bio Medical Signal Processing | IEEE Conference Publication | IEEE Xplore

0. 4V, Low Power GmC Integrator And Bandpass Filter Design For EMG Bio Medical Signal Processing


Abstract:

This paper presents a novel 0.4 V GmC integrator design approach and fourth order bandpass filter design for EMG biomedical applications with high DC gain and and low pow...Show More

Abstract:

This paper presents a novel 0.4 V GmC integrator design approach and fourth order bandpass filter design for EMG biomedical applications with high DC gain and and low power consumption. The filter and integrator are implemented with a new architecture in 180nm CMOS process. By using negative resistance in proposed integrator the response can be controllable. The negative resistance in this paper is implemented with Operational Trans Conductance Amplifier(OTA) The response of proposed integrator is close to ideal integrator behavior.The OTA used in this work is operated with 0.4 V supply and bulk driven structure. The maximum power consumption of integrator is 45 nW and cut off frequency is 160 Hz. The fourth order bandpass filter is consumes 117nW power with bandwidth 260 Hz. The dynamic range of the filter is 63dB.
Date of Conference: 21-23 August 2019
Date Added to IEEE Xplore: 16 March 2020
ISBN Information:
Conference Location: Chennai, India

I. Introduction

Now a days continuous time voltage integrator is one of the basic building blocks of analog signal processing systems like active filters, data converters(ADC) and signal generator etc [1]. Majorly there are three types of integrators like active R-C integrators, OTA-C integrator and MOSFET-C integrators as shown in Fig 1. ActiveR-Cintegrators(OpAmpRC) are not suitable for low power application because of high power dissipation of op Amp [4].The speed of active RC integrator are limited by closed loop feedback. MOSFET-C type integrator usually operates in strong inversion region which might not be a feasible solution for ultra low voltage supplies [2]. The speed of OTA-C type is very high compared to other two types [3]. But because of closed feed back gain and bandwidth are low which can be increased by using Gm-C architecture. The only demerit of Gm C integrator type is poor linearity. In order to overcome this non linear behavior a new OTA is used which balance the non linear behavior of Gm C cell.

References

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