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

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

研究成果: Paper同行評審

摘要

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.

原文English
頁面65-66
頁數2
DOIs
出版狀態Published - 2013 五月 27
事件2013 IEEE International Symposium on Next-Generation Electronics, ISNE 2013 - Kaohsiung, Taiwan
持續時間: 2013 二月 252013 二月 26

Other

Other2013 IEEE International Symposium on Next-Generation Electronics, ISNE 2013
國家/地區Taiwan
城市Kaohsiung
期間13-02-2513-02-26

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程

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