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Matched dual-channel front-end preamplifier for differential time delay measurements

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2 Author(s)
Stuarts, G.H. ; Dept. de Ing. Electr. y Computadoras, Univ. Nac. del Sur, Bahía Blanca, Argentina ; Julián, P.

Presented is an integrated circuit dual-channel front-end preamplifier that minimises the differential time delay (DTD) between two channels. The circuit, which is based on a chopper architecture, works in the audio range and is intended for applications in sound localisation based on bearing estimation. The circuit was fabricated in a 1.5 × 1.5 mm die, in a 0.5 μm technology. Experimental results indicate a mean DTD of 0.125 μs, which is one order of magnitude smaller than the experimental results reported in the literature so far.

Published in:

Electronics Letters  (Volume:48 ,  Issue: 3 )

Date of Publication:

February 2 2012

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