TY - GEN
T1 - A 0.6-V 1.8-μW automatic gain control circuit For digital hearing aid
AU - Su, Yu Cheng
AU - Lee, Shuenn Yuh
AU - Lin, An Po
PY - 2008
Y1 - 2008
N2 - 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.
AB - 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.
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U2 - 10.1109/APCCAS.2008.4745973
DO - 10.1109/APCCAS.2008.4745973
M3 - Conference contribution
AN - SCOPUS:62949098026
SN - 9781424423422
T3 - IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS
SP - 113
EP - 116
BT - Proceedings of APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems
T2 - APCCAS 2008 - 2008 IEEE Asia Pacific Conference on Circuits and Systems
Y2 - 30 November 2008 through 3 December 2008
ER -