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An analog VLSI low-power envelope periodicity detector

An analog VLSI low-power envelope periodicity detector,10.1109/TCSI.2005.852203,IEEE Transactions on Circuits and Systems I-regular Papers,Hisham Abda

An analog VLSI low-power envelope periodicity detector   (Citations: 3)
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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.
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