Integrated ultra-low power precision rectifiers for implantable medical devices

Gak, Joel; Miguez, Matías; Alvarez, E. Charles; Arnaud, Alfredo

doi:10.1109/cae.2019.8709285

Cited by 3 publications

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The envelope detector is one of the critical elements in the weak signal front ends in various applications (sensing, communications, energy harvesting) due to its power-consumption to sensitivity trade-off [ 11 , 12 , 13 , 14 , 15 , 16 ]. In [ 17 ] we studied the impact of the envelope detector on sensitivity and power consumption of the wake-up sensor interface in the lower audio frequency range.…”

Section: Introductionmentioning

confidence: 99%

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

Gazivoda

Bilas

2021

Sensors

View full text Add to dashboard Cite

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.

show abstract