28.6 A 22.6µ W Biopotential Amplifier with Adaptive Common-Mode Interference Cancelation Achieving Total-CMRR of 104dB and CMI Tolerance of 15V<sub>pp</sub> in 0.18µm CMOS

Koo, Nahmil; Kim, Hyojun; Cho, SeongHwan

doi:10.1109/isscc42613.2021.9365971

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…In [2], with the electrode-impedance mismatch increased from 0 to 800 k, the CMRR of the overall system was degraded from 102 to 42 dB. Moreover, higher CMRR is required in two-electrode acquisition systems where much larger CM interference has to be considered [10]- [12]. The total CMRR (TCMRR) is determined by the intrinsic CMRR of the front-end instrumentation amplifier (IA) as well as the mismatch of source impedance, while the latter has to be accommodated by large input CM impedance.…”

Section: Introductionmentioning

confidence: 99%

A 130-dB CMRR Instrumentation Amplifier With Common-Mode Replication

Zhang

Zhou

Gao

et al. 2022

IEEE J. Solid-State Circuits

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High common-mode rejection ratio (CMRR) of an analog front end (AFE) requires high intrinsic CMRR of the front-end amplifier with high input common-mode (CM) impedance. This article presents a common-mode replication (CM-REP) technique, which replicates the input CM voltage over the front-end amplifier. By eliminating the CM current flow and its mismatch effect, CM-REP improves CMRR and input CM impedance simultaneously. Implementation considerations regarding the input CM range, on-chip, and off-chip parasitics have been discussed with practical techniques incorporated with the proposed CM-REP. Fabricated in a 0.18-μm CMOS technology, the measured instrumentation amplifier (IA) exhibits >130-dB CMRR and 50-G input CM impedance at 50/60 Hz concurrently. The >110-dB CMRR is achieved with input CM up to 900 mV pp and >102-dB total CMRR (TCMRR) is obtained with 1-M || 10-nF mismatch of source impedance. The prototype consumes 1.86 μA from a 1.8-V supply and occupies an active area of 0.227 mm 2 .

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Section: Introductionmentioning

confidence: 99%

A 130-dB CMRR Instrumentation Amplifier With Common-Mode Replication

Zhang

Zhou

Gao

et al. 2022

IEEE J. Solid-State Circuits

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An Adaptive Common-Mode Cancellation Biopotential Amplifier for Two-Electrode Dynamic ECG Recording

Zhang,

Xie,

et al. 2024

2024 IEEE International Symposium on Circuits and Systems (ISCAS)

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A 43.3-μW Biopotential Amplifier With Tolerance to Common-Mode Interference of 18 V_pp and T-CMRR of 105 dB in 180-nm CMOS

Koo

Kim

Cho

2023

IEEE J. Solid-State Circuits

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28.6 A 22.6µ W Biopotential Amplifier with Adaptive Common-Mode Interference Cancelation Achieving Total-CMRR of 104dB and CMI Tolerance of 15V_pp in 0.18µm CMOS

Cited by 4 publications

References 6 publications

A 130-dB CMRR Instrumentation Amplifier With Common-Mode Replication

A 130-dB CMRR Instrumentation Amplifier With Common-Mode Replication

An Adaptive Common-Mode Cancellation Biopotential Amplifier for Two-Electrode Dynamic ECG Recording

A 43.3-μW Biopotential Amplifier With Tolerance to Common-Mode Interference of 18 V_pp and T-CMRR of 105 dB in 180-nm CMOS

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28.6 A 22.6µ W Biopotential Amplifier with Adaptive Common-Mode Interference Cancelation Achieving Total-CMRR of 104dB and CMI Tolerance of 15Vpp in 0.18µm CMOS

Cited by 4 publications

References 6 publications

A 130-dB CMRR Instrumentation Amplifier With Common-Mode Replication

A 130-dB CMRR Instrumentation Amplifier With Common-Mode Replication

An Adaptive Common-Mode Cancellation Biopotential Amplifier for Two-Electrode Dynamic ECG Recording

A 43.3-μW Biopotential Amplifier With Tolerance to Common-Mode Interference of 18 Vpp and T-CMRR of 105 dB in 180-nm CMOS

Contact Info

Product

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28.6 A 22.6µ W Biopotential Amplifier with Adaptive Common-Mode Interference Cancelation Achieving Total-CMRR of 104dB and CMI Tolerance of 15V_pp in 0.18µm CMOS

A 43.3-μW Biopotential Amplifier With Tolerance to Common-Mode Interference of 18 V_pp and T-CMRR of 105 dB in 180-nm CMOS