A CMOS EEG detection system with a configurable analog front-end architecture

Alhammadi, Aisha A.; Nazzal, Tasnim B.; Mahmoud, Soliman A.

doi:10.1007/s10470-016-0826-x

Cited by 27 publications

(3 citation statements)

References 18 publications

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“…n instrumentation amplifier is an important electronic device widely applied to amplify the small differential signals in the presence of large common-mode interference. This integrated circuit present a kind of differential amplifier family which can be found in medical instrumentation [1][2][3][4][5], readout circuits of biosensor [6,7], data acquisition and signal processing [8].…”

Section: Introductionmentioning

confidence: 99%

High CMRR Voltage Mode Instrumentation Amplifier Using a New CMOS Differential Difference Current Conveyor Realization

Ettaghzouti

Hassen

2020

International Journal of Systems Applications, Engineering &Amp; Development

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This paper describes a new CMOS realization of differential difference current conveyor circuit. The proposed design offers enhanced characteristics compared to DDCC circuits previously exhibited in the literature. It is characterized by a wide dynamic range with good accuracy thanks to use of adaptive biasing circuit instead of a constant bias current source as well as a wide bandwidth (560 MHz) and a low parasitic resistance at terminal X about 6.86 Ω. A voltage mode instrumentation amplifier circuit (VMIA) composed of a DDCC circuit and two active grounded resistances is shown as application. The proposed VMIA circuit is intended for high frequency applications. This configuration offers significant improvement in accuracy as compared to the state of the art. It is characterized by a controllable gain, a large dynamic range with THD less than 0.27 %, a low noise density (22 nV/Hz1/2) with a power consumption about 0.492 mW and a wide bandwidth nearly 83 MHz. All proposed circuits are simulated by TSPICE using CMOS 0.18 μm TSMC technology with ± 0.8 V supply voltage to verify the theoretical results.

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Section: Introductionmentioning

confidence: 99%

High CMRR Voltage Mode Instrumentation Amplifier Using a New CMOS Differential Difference Current Conveyor Realization

Ettaghzouti

Hassen

2020

International Journal of Systems Applications, Engineering &Amp; Development

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“…Wide tunable analogue filters are significant blocks in today portable electronics and Internet of Things (IoT) devices. They can be used for many applications, ranging from biomedical acquisition systems [1] to the multi‐standard wireless receivers [2]. Sharing the hardware of the analogue filter for different applications will reduce the area and power consumption in the electronic devices.…”

Section: Introductionmentioning

confidence: 99%

An 114 Hz–12 MHz digitally controlled low‐pass filter for biomedical and wireless applications

Elamien

Mahmoud

2018

IET Circuits, Devices & Systems

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This study presents a wide tunable Gm-C low-pass filter for biomedical and wireless applications. The proposed filter was designed using the standard 90 nm complementary metal-oxide-semiconductor technology operating with a balanced supply voltage of 1.2 V. Modified linearisation techniques are used to improve the linearity of the digital programmable operational transconductance amplifiers (DPOTAs) which are used in the filter design. The proposed filter consists of three parallel fourth-order Butterworth sections. Each section is designed and optimised to target a specific band of frequencies. The operation of selecting between the different sections is free of any physical switches. Turning off the unwanted sections is utilised by setting the control bits of the corresponding DPOTAs to zeros. The performance of the proposed filter and DPOTAs is validated through simulation results. The third-order harmonic distortion of the DPOTA remains below −60 dB up to 0.5 V differential input voltage. The simulation results show that the digitally tunable cutoff frequency of the proposed low-pass filter is widely varied in the range of 114 Hz-12 MHz. The proposed filter achieves IIP3 of 28 dBm.

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“…Introduction: Recently, there has been tremendous demand for reconfigurable analogue filters, since it can be used for many applications, ranging from biomedical acquisition systems [1] to the multi-standard wireless receivers [2]. These filters are essential for the development of portable electronics and Internet of things (IoT) devices.…”

mentioning

confidence: 99%

Wide digitally tunable lowpass filter for biomedical and wireless applications

Elamien

Mahmoud

2018

Electron. lett.

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A fully differential Gm-C lowpass filter for wireless and biomedical applications is introduced in this Letter. The proposed filter is based on a highly linear CMOS digital programmable operational transconductance amplifier (DPOTA).The filter consists of a parallel connection of three fourth-order Butterworth sections. Each section is optimised for a specific band of frequencies which can be tuned digitally. Switching between the different sections is achieved by controlling the corresponding DPOTAs' transconductance values, hence, this filter design eliminates the need for switches. Simulation results for a 90 nm CMOS technology are given. The third-order harmonic distortion (HD3) of the DPOTA remains below −60 dB up to 0.5 V differential input voltage at 1.2 V supply voltage. The proposed filter exhibits a wide cutoff frequency tuning range, from 100 Hz to 12 MHz, thus it covers many biomedical and wireless communication standards.

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A CMOS EEG detection system with a configurable analog front-end architecture

Cited by 27 publications

References 18 publications

High CMRR Voltage Mode Instrumentation Amplifier Using a New CMOS Differential Difference Current Conveyor Realization

High CMRR Voltage Mode Instrumentation Amplifier Using a New CMOS Differential Difference Current Conveyor Realization

An 114 Hz–12 MHz digitally controlled low‐pass filter for biomedical and wireless applications

Wide digitally tunable lowpass filter for biomedical and wireless applications

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