A 7.5-mu W 0.08-mm(2) single-ended SC delta-sigma ADC for acoustic sensor applications
- Authors
- Duan, Quanzhen; Wang, Zhidong; Roh, Jeongjin
- Issue Date
- May-2016
- Publisher
- WILEY
- Keywords
- acoustic sensor; delta-sigma analog-to-digital converter (ADC); low power; small size; weak inversion region
- Citation
- INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS, v.44, no.5, pp.1173 - 1185
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
- Volume
- 44
- Number
- 5
- Start Page
- 1173
- End Page
- 1185
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/13714
- DOI
- 10.1002/cta.2156
- ISSN
- 0098-9886
- Abstract
- This study presents an ultra-low-power, small-size, 1-bit, single-ended, and switched-capacitor (SC) delta-sigma analog-to-digital converter (ADC) for wireless acoustic sensor nodes. This wireless sensor node has a delta-sigma ADC that converts the sensed signal to a digital signal for convenient data processing and emphasizes the features of small size and low-power consumption. The chip area of the delta-sigma ADC is dominated by the capacitor; therefore, a novel common-mode (CM) controlling technique with only transistors is proposed. This ADC achieves an extremely small size of 0.08mm(2) in a 130-nm CMOS process. The conventional operational transconductance amplifiers (OTAs) are replaced by inverters in the weak inversion region to achieve high power efficiency. At 4-MHz sampling frequency and 0.7-V power supply voltage, the delta-sigma ADC achieves a 55.8-dB signal-to-noise-plus-distortion ratio (SNDR) and a 298-fJ/step figure-of-merit (FOM) in a signal bandwidth of 25kHz, while consuming only 7.5W of power. Copyright (c) 2015 John Wiley & Sons, Ltd.
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF ENGINEERING SCIENCES > SCHOOL OF ELECTRICAL ENGINEERING > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/13714)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.