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ŠOTNER, R. POLÁK, L. JEŘÁBEK, J. LANGHAMMER, L. FREEBORN, T.
Original Title
Novel voltage Multiplier/Divider-based active square law detector for heartbeat measurement
Type
journal article in Web of Science
Language
English
Original Abstract
This paper describes a novel active voltage detector that is capable of processing analog signals with levels from units of mV up to 250 mV. An advantage of the proposed circuit is that the relationship between output voltage and input level is not linear but quadratic, which increases the sensitivity when processing low-level signals. The presented solution has tuning parameters for correction or intentional shift of internal DC offset and electronic control of the output signal gain level. The application example presents detection of beats per minute (BPM) in the range of 6-300 BPM, which corresponds to a frequency range of 0.1-5 Hz. The advantage of the presented solution is that the output of the circuit is directly a digital signal compatible with TTL levels, so there is no need for any analog to digital converter to produce a digital signal for further processing.
Keywords
Analog multiplier; Beats per minute (BPM); Detector; Heart rate; Sensing readout; Schmitt comparator; Variable gain amplifier
Authors
ŠOTNER, R.; POLÁK, L.; JEŘÁBEK, J.; LANGHAMMER, L.; FREEBORN, T.
Released
28. 2. 2024
Publisher
ELSEVIER SCI LTD
Location
London
ISBN
0263-2241
Periodical
MEASUREMENT, Journal of the International Measurement Confederation (IMEKO)
Year of study
226
Number
2
State
United Kingdom of Great Britain and Northern Ireland
Pages from
1
Pages to
12
Pages count
URL
https://www.sciencedirect.com/science/article/pii/S0263224124000290?via%3Dihub
Full text in the Digital Library
http://hdl.handle.net/11012/249344
BibTex
@article{BUT188348, author="Roman {Šotner} and Ladislav {Polák} and Jan {Jeřábek} and Lukáš {Langhammer} and Todd {Freeborn}", title="Novel voltage Multiplier/Divider-based active square law detector for heartbeat measurement", journal="MEASUREMENT, Journal of the International Measurement Confederation (IMEKO) ", year="2024", volume="226", number="2", pages="1--12", doi="10.1016/j.measurement.2024.114145", issn="0263-2241", url="https://www.sciencedirect.com/science/article/pii/S0263224124000290?via%3Dihub" }