TY - JOUR
T1 - A low-power integrated circuit for interaural time delay estimation without delay lines
AU - Chacón-Rodríguez, A.
AU - Martin-Pirchio, F.
AU - Sanudo, S.
AU - Julian, P.
PY - 2009
Y1 - 2009
N2 - A low-power IC for the estimation of the delay between two infinitely clipped (digital) signals is designed and implemented in a 0.35-μm standard CMOS technology. The proposed circuit is based on a sliding-mode control system and does not need past values of the inputs, which are usually stored using chains of digital registers or analog delay lines and significantly increase the power consumption. The IC is intended to work in ultralow-power miniature sensor network nodes performing localization in the audio range [20, 1000] Hz, as part of a forest environmental protection network. Power dissipation results show a core power consumption of 1.04 μW at 3.3 V and only 282 nW at 1.8 V-in both cases with a clock frequency of 200 kHz. The circuit is fully operative and was successfully tested on field as part of a low-power bearing sensor unit.
AB - A low-power IC for the estimation of the delay between two infinitely clipped (digital) signals is designed and implemented in a 0.35-μm standard CMOS technology. The proposed circuit is based on a sliding-mode control system and does not need past values of the inputs, which are usually stored using chains of digital registers or analog delay lines and significantly increase the power consumption. The IC is intended to work in ultralow-power miniature sensor network nodes performing localization in the audio range [20, 1000] Hz, as part of a forest environmental protection network. Power dissipation results show a core power consumption of 1.04 μW at 3.3 V and only 282 nW at 1.8 V-in both cases with a clock frequency of 200 kHz. The circuit is fully operative and was successfully tested on field as part of a low-power bearing sensor unit.
KW - Acoustic signal processing
KW - Bearing angle estimation
KW - CMOS digital integrated circuits
KW - Correlation-derivative circuit
KW - Delay estimation correlation methods
KW - Direction of arrival estimation
KW - Low-power consumption
KW - Low-power sensor networks
UR - http://www.scopus.com/inward/record.url?scp=68249140324&partnerID=8YFLogxK
U2 - 10.1109/TCSII.2009.2023281
DO - 10.1109/TCSII.2009.2023281
M3 - Artículo
AN - SCOPUS:68249140324
SN - 1549-7747
VL - 56
SP - 575
EP - 579
JO - IEEE Transactions on Circuits and Systems II: Express Briefs
JF - IEEE Transactions on Circuits and Systems II: Express Briefs
IS - 7
ER -