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An analog VLSI low-power envelope periodicity detector

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2 Author(s)
Abdalla, H. ; Dept. of Electr. & Comput. Eng., Univ. of Maryland, College Park, MD, USA ; Horiuchi, T.K.

The low-power, low-cost detection of voices or engine rumble is a desirable function in many different applications. Typical approaches involving frequency-domain computation are quite computationally intensive and require a significant power budget. In an effort to construct a very low-power detector capable of acting as a wake-up signal for other systems, we have designed a low-power (less than 1.8-μW) subthreshold analog very large-scale integration circuit that detects periodicity in the time-domain envelope of the acoustic signal. The circuit was fabricated in a commercially available 2-poly 1.5-μm CMOS process and occupies an area of about 0.242 mm2.

Published in:

Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:52 ,  Issue: 9 )

Date of Publication:

Sept. 2005

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