A 2.3-μW Capacitively Coupled Chopper-Stabilized Neural Amplifier with Input Impedance of 6.7 GΩ

Milad Zamani; Yasser Rezaeiyan; Hai Au Huynh; Margherita Ronchini; Hooman Farkhani; Farshad Moradi

doi:10.1109/LSSC.2021.3094237

A 2.3-μW Capacitively Coupled Chopper-Stabilized Neural Amplifier with Input Impedance of 6.7 GΩ

Milad Zamani^*, Yasser Rezaeiyan, Hai Au Huynh, Margherita Ronchini, Hooman Farkhani, Farshad Moradi

^*Corresponding author for this work

Department of Electrical and Computer Engineering - Electronics and Photonics

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Abstract

Recording electrical activities through high-density electrodes using neural amplifiers plays a crucial role in the successful implementation of a data acquisition system targeting deep-brain regions. To advance the concept of high-density electrodes, neural amplifiers with not only minimum area but also high-power efficiency are needed. This letter presents a neural recording chopper amplifier using the auxiliary path and gain revision techniques to boost the input impedance to a dc value of 6.7 GΩ that meets the requirements of an implantable multichannel recording system. The front-end fabricated in 180-nm CMOS technology occupies an area of 0.051 mm2, and consumes a total power consumption of 2.1μ W drawn from a 1-V supply. The proposed work increases the dc input impedance (18×) and decreases the area by 25% in comparison with conventional auxiliary path impedance boosting with a CMRR of-75 dB, and the input-referred noise of 2.1μ V rms.

Original language	English
Article number	9471814
Journal	IEEE Solid-State Circuits Letters
Volume	4
Pages (from-to)	133 - 136
Number of pages	4
DOIs	https://doi.org/10.1109/LSSC.2021.3094237
Publication status	Published - Jul 2021

Keywords

Brain implant
chopper stabilized
high input impedance
low noise
neural recording amplifier

Access to Document

10.1109/LSSC.2021.3094237

Cite this

@article{bf9a81f3a35d4802ab8e8e4d8cc17cc5,

title = "A 2.3-μW Capacitively Coupled Chopper-Stabilized Neural Amplifier with Input Impedance of 6.7 GΩ",

abstract = "Recording electrical activities through high-density electrodes using neural amplifiers plays a crucial role in the successful implementation of a data acquisition system targeting deep-brain regions. To advance the concept of high-density electrodes, neural amplifiers with not only minimum area but also high-power efficiency are needed. This letter presents a neural recording chopper amplifier using the auxiliary path and gain revision techniques to boost the input impedance to a dc value of 6.7 GΩ that meets the requirements of an implantable multichannel recording system. The front-end fabricated in 180-nm CMOS technology occupies an area of 0.051 mm2, and consumes a total power consumption of 2.1μ W drawn from a 1-V supply. The proposed work increases the dc input impedance (18×) and decreases the area by 25% in comparison with conventional auxiliary path impedance boosting with a CMRR of-75 dB, and the input-referred noise of 2.1μ V rms.",

keywords = "Brain implant, chopper stabilized, high input impedance, low noise, neural recording amplifier",

author = "Milad Zamani and Yasser Rezaeiyan and Huynh, {Hai Au} and Margherita Ronchini and Hooman Farkhani and Farshad Moradi",

year = "2021",

month = jul,

doi = "10.1109/LSSC.2021.3094237",

language = "English",

volume = "4",

pages = "133 -- 136",

journal = "IEEE Solid-State Circuits Letters",

}

A 2.3-μW Capacitively Coupled Chopper-Stabilized Neural Amplifier with Input Impedance of 6.7 GΩ. / Zamani, Milad ; Rezaeiyan, Yasser; Huynh, Hai Au et al.
In: IEEE Solid-State Circuits Letters, Vol. 4, 9471814, 07.2021, p. 133 - 136.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - A 2.3-μW Capacitively Coupled Chopper-Stabilized Neural Amplifier with Input Impedance of 6.7 GΩ

AU - Zamani, Milad

AU - Rezaeiyan, Yasser

AU - Huynh, Hai Au

AU - Ronchini, Margherita

AU - Farkhani, Hooman

AU - Moradi, Farshad

PY - 2021/7

Y1 - 2021/7

N2 - Recording electrical activities through high-density electrodes using neural amplifiers plays a crucial role in the successful implementation of a data acquisition system targeting deep-brain regions. To advance the concept of high-density electrodes, neural amplifiers with not only minimum area but also high-power efficiency are needed. This letter presents a neural recording chopper amplifier using the auxiliary path and gain revision techniques to boost the input impedance to a dc value of 6.7 GΩ that meets the requirements of an implantable multichannel recording system. The front-end fabricated in 180-nm CMOS technology occupies an area of 0.051 mm2, and consumes a total power consumption of 2.1μ W drawn from a 1-V supply. The proposed work increases the dc input impedance (18×) and decreases the area by 25% in comparison with conventional auxiliary path impedance boosting with a CMRR of-75 dB, and the input-referred noise of 2.1μ V rms.

AB - Recording electrical activities through high-density electrodes using neural amplifiers plays a crucial role in the successful implementation of a data acquisition system targeting deep-brain regions. To advance the concept of high-density electrodes, neural amplifiers with not only minimum area but also high-power efficiency are needed. This letter presents a neural recording chopper amplifier using the auxiliary path and gain revision techniques to boost the input impedance to a dc value of 6.7 GΩ that meets the requirements of an implantable multichannel recording system. The front-end fabricated in 180-nm CMOS technology occupies an area of 0.051 mm2, and consumes a total power consumption of 2.1μ W drawn from a 1-V supply. The proposed work increases the dc input impedance (18×) and decreases the area by 25% in comparison with conventional auxiliary path impedance boosting with a CMRR of-75 dB, and the input-referred noise of 2.1μ V rms.

KW - Brain implant

KW - chopper stabilized

KW - high input impedance

KW - low noise

KW - neural recording amplifier

UR - http://www.scopus.com/inward/record.url?scp=85110558282&partnerID=8YFLogxK

U2 - 10.1109/LSSC.2021.3094237

DO - 10.1109/LSSC.2021.3094237

M3 - Journal article

VL - 4

SP - 133

EP - 136

JO - IEEE Solid-State Circuits Letters

JF - IEEE Solid-State Circuits Letters

M1 - 9471814

ER -

A 2.3-μW Capacitively Coupled Chopper-Stabilized Neural Amplifier with Input Impedance of 6.7 GΩ

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this