A 91-dB DR 20-kHz BW 5th-Order Multi-Step Incremental ADC for Sensor Interfaces by Re-Using a MASH 2-1 Modulator

Jia Sheng Huang, Shih Che Kuo, Yu Cheng Huang, Chia Wei Kao, Che Wei Hsu, Chia Hung Chen

研究成果: Conference contribution同行評審

2 引文 斯高帕斯(Scopus)

摘要

Incremental ΔΣ analog-to-digital-converters (IADCs) possess indispensable advantages over conventional ΔΣ counterparts to interface the sensors. By adding global reset pulses to clear the memory in oversampled modulators and decimation filters, the reset pulses output the Nyquist-rate digitized samples. The hybrid of oversampling and Nyquist-rate conversions are thus easier to multiplex among multiple channels with very low conversion latency and much simpler decimation filters. These strengths favor the IADCs for high-resolution sensor data conversions, for example, column-parallel ADCs in image sensors and touch control panels. However, a first-order IADC (IADC1) is too slow and at least a second-order (IADC2) or a higher-order one is mandatory to shorten the conversion time and achieve good energy efficiency. To mitigate the instability of high-order IADCs and extend the non-overloaded input range, cascaded or multi-stage noise-shaping (MASH) modulators is an effective solution. In this paper, a MASH IADC (IADC2-1) incorporating an IADC2 and an IADC1 is proposed to operate in two steps by re-using and re-configuring the same circuits of IADC2-1. The third-order noise-shaping performance is boosted up to fifth-order with very low oversampling ratio (OSR) and very small area in 0.18 μm technology.

原文English
主出版物標題2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings
發行者Institute of Electrical and Electronics Engineers Inc.
頁面2-4
頁數3
ISBN(電子)9781665471435
DOIs
出版狀態Published - 2022
事件2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Taipei, Taiwan
持續時間: 6 11月 20229 11月 2022

出版系列

名字2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings

Conference

Conference2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022
國家/地區Taiwan
城市Taipei
期間6/11/229/11/22

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