Science China Information Sciences

, Volume 57, Issue 4, pp 1–10

A low-power inverter-based ΣΔ analog-to-digital converter for audio applications

  • XiaoPeng Liu
  • Yan Han
  • XiaoXia Han
  • Hao Luo
  • Ray C. C. Cheung
  • TianLin Cao
Research Paper
  • 205 Downloads

Abstract

This paper presents a design for a low-power, high-resolution audio ΣΔ analog-to-digital converter (ADC) based on a novel gain-boost class-C inverter. The gain-boost class-C inverter behaves as a sub-threshold amplifier, thereby minimizing power dissipation. The proposed ADC chip is fabricated in a SMIC 65-nm CMOS process with a die area of 0.63 mm2. With 1.2 V of supply voltage, the ADC chip achieves a peak signal-to-noise-plus-distortion-ratio (SNDR) of 92 dB and a dynamic range (DR) of 97 dB over the 20 kHz audio band, consuming only 1.13 mW. These results make the ADC particularly suitable for portable electronics applications.

Keywords

ΣΔ ADC class-C inverter low-power high-resolution gain-boost 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • XiaoPeng Liu
    • 1
  • Yan Han
    • 1
  • XiaoXia Han
    • 1
  • Hao Luo
    • 1
  • Ray C. C. Cheung
    • 2
  • TianLin Cao
    • 1
  1. 1.Institute of Microelectronics & PhotoelectronicsZhejiang UniversityHangzhouChina
  2. 2.Department of Electronic EngineeringCity University of Hong KongHong KongChina

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