A 0.6-V 1.8-μW automatic gain control circuit For digital hearing aid

Yu Cheng Su, Shuenn-Yuh Lee, An Po Lin

研究成果: Conference contribution

7 引文 斯高帕斯(Scopus)

摘要

An automatic gain control (AGC) circuit composed of a variable gain amplifier (VGA), a peak detector (PD), and a nonlinear controller (NC) for digital hearing aid is proposed. To achieve low power consumption under 0.6-V supply voltage with threshold voltage Vth of 0.5 V, the AGC has been operated in the sub-threshold region with body-driven input. Moreover, the gate-degeneration and bump-circuit techniques are adopted to improve the linearity. The chip has been fabricated in TSMC 0.18-μm standard CMOS process, 52 dB gain range can be achieved under the measured results. Besides, the power consumption of the whole circuit is lower than 1.8 μW under normal conditions and the peak signal to noise ratio (SNR) is 39 dB. The core area of the AGC is 0.933mm x 0.828mm.

原文English
主出版物標題Proceedings of APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems
頁面113-116
頁數4
DOIs
出版狀態Published - 2008 十二月 1
事件APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems - Macao, China
持續時間: 2008 十一月 302008 十二月 3

出版系列

名字IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS

Other

OtherAPCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems
國家/地區China
城市Macao
期間08-11-3008-12-03

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程

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