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

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

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© The Institution of Engineering and Technology
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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 × 1.5mm 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.

Inspec keywords: preamplifiers; integrated circuits; choppers (circuits)

Other keywords: audio range; chopper architecture; time 0.125 mus; integrated circuit dual-channel front-end preamplifier; size 0.5 mum; sound localisation; matched dual-channel front-end preamplifier; differential time delay measurement

Subjects: Amplifiers; Other analogue circuits

References

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      • Arnaud, A.: `An efficient chopper amplifier, using a switched gm-c filter technique’', 18thSymp. on Integrated Circuits and Systems Design, 2005, p. 213–218.
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      • F. Maloberti . (2001) Analog design for CMOS VLSI systems’.
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      • J.G. Harris , C.J. Pu , J.C. Principe . A neuromorphic monaural sound localizer. Advances in Neural Information Processing Systems
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      • G. Stuarts , P. Julián . Analysis of time delay difference due to parametric mismatch in matched filter channels. Proc. Argentine School of Micro-Nanoelectronics Technology and Applications, (EAMTA) , 1 - 7
    10. 10)
      • T. Horiuchi . An auditory localisation and coordinate transform chip. Adv. Neural Inf. Process. Syst.
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