A wide dynamic range sigma-delta modulator with automated coefficients adaptation

Ming Chun Liang, Jia Hua Hong, Yu Jie Chiou, Shuenn-Yuh Lee

Research output: Contribution to conferencePaperpeer-review

Abstract

A fourth order, low power sigma-delta modulator (SDM) with dynamic range (DR) extend technique is presented. The SDM was implemented as a sensing circuit for hearing aids systems instead of the traditional complex analog front end (AFE). The wide dynamic range sigma delta modulator (WDSDM) is implemented with a feed-forward architecture, order of 4, oversampling ratio (OSR) of 32, and an 1-bit quantizer under a sampling frequency of 1.44 MHz. The TSMC 0.18 μm 1P6M CMOS process is employed. Without the DR extended technique, the measured signal-to-noise distortion ratio (SNDR) and DR are 63.5 dB and 75 dB, respectively. By applying the DR extended technique, the measured DR can be extended to 88dB and its power consumption is 49.5 μW under the supply voltage of 1.8V.

Original languageEnglish
Pages65-66
Number of pages2
DOIs
Publication statusPublished - 2013 May 27
Event2013 IEEE International Symposium on Next-Generation Electronics, ISNE 2013 - Kaohsiung, Taiwan
Duration: 2013 Feb 252013 Feb 26

Other

Other2013 IEEE International Symposium on Next-Generation Electronics, ISNE 2013
Country/TerritoryTaiwan
CityKaohsiung
Period13-02-2513-02-26

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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