A 1.2-V 108.9-dB A-Weighted DR 101.4-dB SNDR Audio Sigma Delta ADC Using a Multi-Rate Noise-Shaping Quantizer
- Authors
- Cho, Jun Soo; Rhee, Cyuyeol; Kim, Susie; Yang, Youngtae; Jun, Jaehoon; Kim, Suhwan; Lee, Hyunjoong
- Issue Date
- Oct-2018
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- CMOS; audio; mobile application; analog-to-digital conversion; multi-rate noise-shaping; quantizer
- Citation
- IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, v.65, no.10, pp.1315 - 1319
- Journal Title
- IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
- Volume
- 65
- Number
- 10
- Start Page
- 1315
- End Page
- 1319
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/88623
- DOI
- 10.1109/TCSII.2018.2853189
- ISSN
- 1549-7747
- Abstract
- Along with the trend to reduce the power consumption of mobile devices, interface circuits such as analog-to-digital converters (ADCs) should also be designed to operate reliably at low supply voltages without compromising production yield. We present a high-fidelity audio Sigma Delta ADC suitable for lowvoltage mobile applications, based on a new multi-bit quantizer. Its effective resolution is increased economically by augmenting an internal low-resolution quantizer with the proposed multi-rate noise-shaping technique. Fabricated in a 0.13-mu m CMOS technology, our ADC uses 3.5 mW at 1.2 V, and achieved an A-weighted DR of 108.9 dB and a peak signal-to-noise and distortion ratio of 101.4 dB.
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