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

Yu Cheng Su, Shuenn Yuh Lee, An Po Lin

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

8 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems
Pages113-116
Number of pages4
DOIs
Publication statusPublished - 2008
EventAPCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems - Macao, China
Duration: 2008 Nov 302008 Dec 3

Publication series

NameIEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS

Other

OtherAPCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems
Country/TerritoryChina
CityMacao
Period08-11-3008-12-03

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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