IEICE Electronics Express | |
A 240μW 17bit ENOB ΔΣ modulator using 2nd-order noise-shaped integrating quantizer | |
article | |
Kunyu Wang1  Wenjing Xu1  Chengbin Zhang1  Man-Kay Law2  Li Zhou1  Ming Chen1  Jie Chen1  | |
[1] Institute of Microelectronics of the Chinese Academy of Science;University of Macau | |
关键词: analog-to-digital conversion; ΔΣ modulator; noise enhancement circuit; noise-shaping quantizer; | |
DOI : 10.1587/elex.19.20220038 | |
学科分类:电子、光学、磁材料 | |
来源: Denshi Jouhou Tsuushin Gakkai | |
【 摘 要 】
This paper presents a discrete-time (DT) 4th-order ΔΣ modulator using a 2nd-order noise-shaped integrating quantizer (NSIQ). By adding a passive finite impulse response (FIR) filter to the 1st-order NSIQ, the proposed quantizer has obtained 2nd-order noise shaping ability, without extra power consumption. By incorporating the digital integrator, the linearity requirement of the quantizer is relaxed. The proposed modulator is fabricated in a 0.18μm CMOS process, and operates at 1MS/s achieves a peak signal-to-noise-and-distortion ratio (SNDR) of 106.9dB in a 10kHz bandwidth while consuming 240μW with 1.8V power supply.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO202306290004407ZK.pdf | 3743KB | download |