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A 240 μW 17 bit ENOB ΔΣ Modulator Using 2nd-order Noise-Shaped Integrating Quantizer

Kunyu Wang, Wenjing Xu, Chengbin Zhang, Man-Kay Law, Li Zhou, Ming Chen, Jie Chen
2022 IEICE Electronics Express  

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This paper presents a discrete-time (DT) 4 th -order ΔΣ modulator using a 2 nd -order noise-shaped integrating quantizer (NSIQ). By adding a passive finite impulse response (FIR) filter to the 1 st -order NSIQ, the proposed quantizer has obtained 2 nd -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 0.18 μm CMOS process, and operates at 1 MS/s
more » ... hieves a peak signal-to-noise-and-distortion ratio (SNDR) of 106.9 dB in a 10 kHz bandwidth while consuming 240 μW with 1.8 V power supply.
doi:10.1587/elex.19.20220038 fatcat:ntpc7i3tg5ffln4qjkybp57jnu
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Kunyu Wang, Wenjing Xu, Chengbin Zhang, Man-Kay Law, Li Zhou, Ming Chen, Jie Chen. "A 240 μW 17 bit ENOB ΔΣ Modulator Using 2nd-order Noise-Shaped Integrating Quantizer." IEICE Electronics Express 19.5 (2022)