A 350-nW Low-Noise Amplifier With Reduced Flicker-Noise for Bio-Signal Acquisition

Stefan Schmickl; Tim Schumacher; Patrick Fath; Thomas Faseth; Harald Pretl

doi:10.1109/Austrochip51129.2020.9232981

A 350-nW Low-Noise Amplifier With Reduced Flicker-Noise for Bio-Signal Acquisition

Stefan Schmickl (Editor), Tim Schumacher, Patrick Fath, Thomas Faseth, Harald Pretl

Department of Integrated Circuits

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings › peer-review

Abstract

For the acquisition of bio-signals, like EEG or ECG, there is a need for low-noise amplifiers that are capable of amplifying input-signals with high source-impedance at very low frequencies <1 Hz, while rejecting DC-offsets > 100 mV at the electrode-tissue interface, ideally without using external components. This fully differential amplifier achieves a gain of 38.7 dB with a CMRR of 74 dB and an input-referred noise of 0.97 μVrms while consuming 350 nW of power at 1 V supply voltage. This renders the amplifier well suited for RF-powered wireless bio-sensing applications. The amplifier uses a flickernoise reducing switched capacitor feedback and a special method of metal-metal capacitor design to maximize the area-density. This fully-integrated design is implemented in a 1P6M 180 nm CMOS technology using 0.42 mm².

Original language	English
Title of host publication	Proceedings 2020 Austrochip Workshop on Microelectronics
Number of pages	4
DOIs	https://doi.org/10.1109/Austrochip51129.2020.9232981
Publication status	Published - Oct 2020

Fields of science

102005 Computer aided design (CAD)
202 Electrical Engineering, Electronics, Information Engineering
202006 Computer hardware
202018 Semiconductor electronics
202023 Integrated circuits
202027 Mechatronics
202028 Microelectronics
202037 Signal processing

JKU Focus areas

Digital Transformation

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10.1109/Austrochip51129.2020.9232981

Cite this

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title = "A 350-nW Low-Noise Amplifier With Reduced Flicker-Noise for Bio-Signal Acquisition",

abstract = "For the acquisition of bio-signals, like EEG or ECG, there is a need for low-noise amplifiers that are capable of amplifying input-signals with high source-impedance at very low frequencies <1 Hz, while rejecting DC-offsets > 100 mV at the electrode-tissue interface, ideally without using external components. This fully differential amplifier achieves a gain of 38.7 dB with a CMRR of 74 dB and an input-referred noise of 0.97 μVrms while consuming 350 nW of power at 1 V supply voltage. This renders the amplifier well suited for RF-powered wireless bio-sensing applications. The amplifier uses a flickernoise reducing switched capacitor feedback and a special method of metal-metal capacitor design to maximize the area-density. This fully-integrated design is implemented in a 1P6M 180 nm CMOS technology using 0.42 mm².",

author = "Stefan Schmickl and Tim Schumacher and Patrick Fath and Thomas Faseth and Harald Pretl",

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language = "English",

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AU - Schumacher, Tim

AU - Fath, Patrick

AU - Faseth, Thomas

AU - Pretl, Harald

A2 - Schmickl, Stefan

PY - 2020/10

Y1 - 2020/10

N2 - For the acquisition of bio-signals, like EEG or ECG, there is a need for low-noise amplifiers that are capable of amplifying input-signals with high source-impedance at very low frequencies <1 Hz, while rejecting DC-offsets > 100 mV at the electrode-tissue interface, ideally without using external components. This fully differential amplifier achieves a gain of 38.7 dB with a CMRR of 74 dB and an input-referred noise of 0.97 μVrms while consuming 350 nW of power at 1 V supply voltage. This renders the amplifier well suited for RF-powered wireless bio-sensing applications. The amplifier uses a flickernoise reducing switched capacitor feedback and a special method of metal-metal capacitor design to maximize the area-density. This fully-integrated design is implemented in a 1P6M 180 nm CMOS technology using 0.42 mm².

AB - For the acquisition of bio-signals, like EEG or ECG, there is a need for low-noise amplifiers that are capable of amplifying input-signals with high source-impedance at very low frequencies <1 Hz, while rejecting DC-offsets > 100 mV at the electrode-tissue interface, ideally without using external components. This fully differential amplifier achieves a gain of 38.7 dB with a CMRR of 74 dB and an input-referred noise of 0.97 μVrms while consuming 350 nW of power at 1 V supply voltage. This renders the amplifier well suited for RF-powered wireless bio-sensing applications. The amplifier uses a flickernoise reducing switched capacitor feedback and a special method of metal-metal capacitor design to maximize the area-density. This fully-integrated design is implemented in a 1P6M 180 nm CMOS technology using 0.42 mm².

UR - https://ieeexplore.ieee.org/document/9232981

U2 - 10.1109/Austrochip51129.2020.9232981

DO - 10.1109/Austrochip51129.2020.9232981

M3 - Conference proceedings

BT - Proceedings 2020 Austrochip Workshop on Microelectronics

ER -

A 350-nW Low-Noise Amplifier With Reduced Flicker-Noise for Bio-Signal Acquisition

Abstract

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