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Low-Power Sensor Interface with a Switched Inductor Frequency Selective Envelope Detector (CROSBI ID 292051)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Gazivoda, Marko ; Bilas, Vedran Low-Power Sensor Interface with a Switched Inductor Frequency Selective Envelope Detector // Sensors, 21 (2021), 6; 2124, 21. doi: 10.3390/s21062124

Podaci o odgovornosti

Gazivoda, Marko ; Bilas, Vedran

engleski

Low-Power Sensor Interface with a Switched Inductor Frequency Selective Envelope Detector

With the growing need to understand our surroundings and improved means of sensor manufacturing, the concept of Internet of Things (IoT) is becoming more interesting. To enable continuous monitoring and event detection by IoT, the development of low power sensors and interfaces is required. In this work we present a novel, switched inductor based acoustic sensor interface featuring a bandpass filter and envelope detector, perform a sensitivity, frequency selectivity, and power consumption analysis of the circuit, and present its design parameters and their qualitative influence on circuit characteristics. We develop a prototype and present experimental characterization of the interface and its operation with input signals up to 20 mV peak-to-peak, at low acoustic frequencies from 100 Hz to 1 kHz. The prototype achieves a sensitivity of approximately 2 mV/mV in the passband, a four times lower sensitivity in the stopband, and a power consumption of approximately 3.31 µW. We compare the prototype interface to an interface consisting of an active bandpass filter and a passive voltage doubler using a prerecorded speedboat signal.

sensor signal conditioning circuit ; event detection application ; switched inductor filter ; weak signal detection

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Podaci o izdanju

21 (6)

2021.

2124

21

objavljeno

1424-8220

10.3390/s21062124

Povezanost rada

Elektrotehnika

Poveznice
Indeksiranost