103.1-dB DR Switched-Resistor Delta-Sigma Modulator With Chopped Negative-R for Suppressing Low-Bandwidth Noise
- Title
- 103.1-dB DR Switched-Resistor Delta-Sigma Modulator With Chopped Negative-R for Suppressing Low-Bandwidth Noise
- Author
- 노정진
- Keywords
- 1f noise; AC-DC power converters; Analog-to-digital converter (ADC); Capacitance; chopped negative R; continuous-time delta-sigma modulator (CTDSM); low bandwidth; Resistors; Signal to noise ratio; switched resistor (SR) integrator; Switches; Thermal noise; Thermal resistance
- Issue Date
- 2023-09
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Citation
- IEEE Access, v. 11, Page. 1.0-9.0
- Abstract
- This paper presents a high-resolution, low-bandwidth, continuous-time delta-sigma modulator (CTDSM). Although continuous-time integrators are popular for implementing power-efficient DSMs, the coefficient of conventional RC integrators depends on the clock frequency and requires excessively large resistance and capacitance for implementation in low-bandwidth CTDSMs. The high resistance causes thermal noise, limiting the overall performance of the modulator. Accordingly, the CTDSM presented herein incorporates a switched resistor (SR) integrator that overcomes the thermal noise issue and enables high-resolution CTDSM to be used in low-bandwidth applications. The proposed integrator also adopts a chopped negative-R technique to reduce the flicker noise in the amplifier while simultaneously enhancing linearity. The proposed 3rd-order CTDSM is successfully fabricated in a 0.18-μm CMOS process and achieves the following measurement results: a peak signal-to-noise and distortion ratio of 98.8 dB, dynamic range of 103.1 dB, total power consumption of 20.3 μW, and signal bandwidth of 200 Hz. Author
- URI
- https://ieeexplore.ieee.org/document/10258273https://repository.hanyang.ac.kr/handle/20.500.11754/187760
- ISSN
- 2169-3536
- DOI
- 10.1109/ACCESS.2023.3317975
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
- Files in This Item:
- 109342_노정진.pdfDownload
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