A 2.16-mu W Low-Power Continuous-Time Delta-Sigma Modulator With Improved-Linearity G(m) for Wearable ECG Application
- Title
- A 2.16-mu W Low-Power Continuous-Time Delta-Sigma Modulator With Improved-Linearity G(m) for Wearable ECG Application
- Author
- 노정진
- Keywords
- Electrocardiography; Delta-sigma modulation; Voltage; Transistors; Simulation; Power demand; Gain; Continuous-time delta-sigma modulation; weak inversion; G(m)-C structure; operational transconductance amplifier; low-power consumption
- Issue Date
- 2022-11
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Citation
- IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, v. 69, NO. 11, Page. 4223-4227
- Abstract
- This brief presents a 2.16 mu W low-power third-order single-bit continuous-time delta-sigma modulator (CTDSM) for electrocardiogram (ECG) signal acquisition application. The proposed CTDSM uses an active-RC (A-RC) integrator as a first integrator and an improved linearized G(m)-C integrator for the second and third integrators, respectively. The mixed-integrator structure helps to mitigate the trade-offs between power consumption and resolution. Moreover, a source-degenerated auxiliary differential pair circuit is used for the G(m)-C integrators to improve their linearity. By using A-RC and G(m)-C integrators together along with an improved-linearized G(m) block, the total power consumption was measured as 2.16 mu W with a peak signal-to-noise ratio of 80.1 dB, signal-to-noise, and distortion ratio of 78.4 dB, and a dynamic range of 81.4 dB with a bandwidth of 250 Hz. Furthermore, a real-time ECG signal was successfully captured in an ECG acquisition system that consisted a heart-rate sensor and a signal acquisition circuit, including the proposed CTDSM.
- URI
- https://ieeexplore.ieee.org/document/9817453https://repository.hanyang.ac.kr/handle/20.500.11754/183441
- ISSN
- 1549-7747;1558-3791
- DOI
- 10.1109/TCSII.2022.3188793
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
- Files in This Item:
- 97281_노정진.pdfDownload
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