A High-Input Impedance Chopper Capacitively Coupled Instrumentation Amplifier With DC Offset Compensation
An improved chopper capacitively coupled instrumentation amplifier (CCIA) is proposed for electrocardiogram (ECG) signal acquisition applications. Impedance boosting techniques improve the input impedance. The direct current servo loop (DSL) along with a programmable DC offset compensation module suppresses electrode offset. The CCIA, fabricated in 0.18μm CMOS, achieves an input impedance of 2.2GΩ and suppresses electrode offset up to 230mV under 1.8V supply. The input-referred noise of 1.4 μVrms is measured with 2.07 μW power consumption.
Authors
- Yifeng Yao (ORCID: https://orcid.org/0000-0002-5181-7884)
- Bin Li (ORCID: https://orcid.org/0000-0002-2643-4822)
- Zhijian Li (ORCID: https://orcid.org/0000-0001-8402-607X)
- Zhijian Chen (ORCID: https://orcid.org/0000-0002-1182-7340)
- Zhaohui Wu (ORCID: https://orcid.org/0000-0001-9026-1930)
Institutions
- South China University of Technology (CN)
Publication Details
- Published
- 2024-09-20
- DOI
- https://doi.org/10.1109/iccs62517.2024.10846636
- Citations
- 1
- Primary Topic
- Sensor Technology and Measurement Systems
- Type
- article
- Field-Weighted Citation Impact
- 0.35
Funders
- National Natural Science Foundation of China