High-Pass Sigma–Delta Modulator With Techniques of Operational Amplifier Sharing and Programmable Feedforward Coefficients for ECG Signal Acquisition
| العنوان: | High-Pass Sigma–Delta Modulator With Techniques of Operational Amplifier Sharing and Programmable Feedforward Coefficients for ECG Signal Acquisition |
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| المؤلفون: | Yi-Wen Hung, Ju Yi Chen, Po-Han Su, Kuan-Lin Huang, Shuenn-Yuh Lee |
| المصدر: | IEEE Transactions on Biomedical Circuits and Systems. 15:443-453 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Amplifiers, Electronic, Dynamic range, Computer science, Amplifier, Biomedical Engineering, Feed forward, Signal Processing, Computer-Assisted, Equipment Design, Signal-To-Noise Ratio, Delta-sigma modulation, law.invention, Electrocardiography, law, Operational amplifier, Electronic engineering, Figure of merit, Electrical and Electronic Engineering, High-pass filter, Frequency modulation |
| الوصف: | A high-pass sigma-delta modulator (HPSDM) is proposed for electrocardiography (ECG) signal acquisition system. The HPSDM is implemented using operational amplifier (op-amp) sharing and programmable feedforward coefficients. The op-amp sharing is adopted to reduce the quantity of amplifiers because they dominate the power consumption of the HPSDM. In addition, given that the magnitude of the ECG is dependent on different persons, programmable feedforward coefficients are utilized to extend the dynamic range of the HPSDM to fit the actual application. The proposed HPSDM is fabricated in a 0.18-μm standard CMOS process. Measurement results reveal that the proposed HPSDM has a signal-to-noise and distortion ratio (SNDR) of 54.5 dB and a power consumption of 2.25 μW under a 1.2 V supply voltage and achieves a figure of merit (FoM) of 12.96 pJ/conv. Moreover, the proposed HPSDM has an SNDR of 64.8 dB and a power consumption of 5.2 μW under a 1.8 V supply voltage and achieves a FoM of 9.15 pJ/conv due to the op-amp sharing technique. Under the 1.2 V and 1.8 V supply voltages, the dynamic range of the HPSDM is extended to approximately 12 dB due to the technique of programmable feedforward coefficients. |
| تدمد: | 1940-9990 1932-4545 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d360c29470a2504cc081ebdc3018334 https://doi.org/10.1109/tbcas.2021.3082545 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....2d360c29470a2504cc081ebdc3018334 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19409990 19324545 |
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