A 185 μw -105.1 dB THD 88.6 dB SNDR Negative-R Stabilized Audio Preamplifier

Seungwoo Song, Changuk Lee, Moonhyung Jang, Youngcheol Chae

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

This paper presents a low-power preamplifier for high fidelity audio codecs. It attains high linearity at low power by using a negative-R stabilized amplifier architecture that employs a negative-R assisted amplifier in a low-frequency path to cancel the non-idealities of a main amplifier. This shows the in-band noise attenuation of amplifiers and the drastic improvement of the linearity. Fabricated in a 65-nm CMOS process,the preamplifier achieves -105.1 dB THD,88.6 dB SNDR,and 89.3 dB DR with 20 dB gain in 20 kHz bandwidth,while consuming only 185 μW from a 1.2 V supply. This results in the highest energy-efficiency FoMSNDR of 168.9 dB among audio preamplifiers.

Original languageEnglish
Title of host publicationESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages261-264
Number of pages4
ISBN (Electronic)9781728115504
DOIs
Publication statusPublished - 2019 Sep
Event45th IEEE European Solid State Circuits Conference, ESSCIRC 2019 - Cracow, Poland
Duration: 2019 Sep 232019 Sep 26

Publication series

NameESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference

Conference

Conference45th IEEE European Solid State Circuits Conference, ESSCIRC 2019
Country/TerritoryPoland
CityCracow
Period19/9/2319/9/26

Bibliographical note

Funding Information:
This work was supported by Samsung Electronics (YSSRC program). The authors would like to thank the Rohde & Schwarz for the support of test instruments.

Publisher Copyright:
© 2019 IEEE.

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electronic, Optical and Magnetic Materials
  • Hardware and Architecture
  • Electrical and Electronic Engineering

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