Special analog multipliers in voltage-controlled oscillator and phase-locked loop-based FM demodulator for measurement and processing of sensed low-frequency signals
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F22%3APU145476" target="_blank" >RIV/00216305:26220/22:PU145476 - isvavai.cz</a>
Výsledek na webu
<a href="https://www.sciencedirect.com/science/article/pii/S0263224122009393" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0263224122009393</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.measurement.2022.111734" target="_blank" >10.1016/j.measurement.2022.111734</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Special analog multipliers in voltage-controlled oscillator and phase-locked loop-based FM demodulator for measurement and processing of sensed low-frequency signals
Popis výsledku v původním jazyce
The processing of low-frequency slowly varying signals (e.g. nonelectrical signals measured by sensors) in on-chip signal processing systems is not an easy task due to using of AC coupling between the parts of integrated components (e.g. very large and on-chip nonproductive values of coupling capacity required for separation of the DC component of a signal). One of the solutions to overcome this issue immediately at the input site is to transpose such low-frequency signals to higher frequency bands, for instance, based on the principle of frequency modulation/demodulation (FM) spectral transposition (higher frequency of the processed signal means lower value of coupling capacity). This paper focuses on the improvement of a voltage-controlled oscillator (VCO) for phase-locked loop (PLL) based FM demodulator for processing and measurement of signals with slow changes. There is introduced a novel concept of adjustability of the oscillation condition performed by a special analog multiplier. It brings reduction of complexity of the resulting topology and the designed oscillator operates with linearly adjustable (by DC voltage) frequency range of one decade from 4 kHz up to 43 kHz. This VCO is applied in a demodulator of FM modulated waveforms based on PLL methodology employing the same active cells (integrated multipliers and buffers). The proposed and realized concept is suitable for specific low-frequency applications and the presented example improves propagation of low-frequency signals of mechanical vibrations and biomedical signals through signal-processing systems integrated on chip (e.g. a sensed electrocardiogram wave) where fabrication of large coupling capacity values on chip represents significant issue. Active cells fabricated in ON Semiconductor 0.35 mu m I3T25 3.3 V process were used for experimental verification.
Název v anglickém jazyce
Special analog multipliers in voltage-controlled oscillator and phase-locked loop-based FM demodulator for measurement and processing of sensed low-frequency signals
Popis výsledku anglicky
The processing of low-frequency slowly varying signals (e.g. nonelectrical signals measured by sensors) in on-chip signal processing systems is not an easy task due to using of AC coupling between the parts of integrated components (e.g. very large and on-chip nonproductive values of coupling capacity required for separation of the DC component of a signal). One of the solutions to overcome this issue immediately at the input site is to transpose such low-frequency signals to higher frequency bands, for instance, based on the principle of frequency modulation/demodulation (FM) spectral transposition (higher frequency of the processed signal means lower value of coupling capacity). This paper focuses on the improvement of a voltage-controlled oscillator (VCO) for phase-locked loop (PLL) based FM demodulator for processing and measurement of signals with slow changes. There is introduced a novel concept of adjustability of the oscillation condition performed by a special analog multiplier. It brings reduction of complexity of the resulting topology and the designed oscillator operates with linearly adjustable (by DC voltage) frequency range of one decade from 4 kHz up to 43 kHz. This VCO is applied in a demodulator of FM modulated waveforms based on PLL methodology employing the same active cells (integrated multipliers and buffers). The proposed and realized concept is suitable for specific low-frequency applications and the presented example improves propagation of low-frequency signals of mechanical vibrations and biomedical signals through signal-processing systems integrated on chip (e.g. a sensed electrocardiogram wave) where fabrication of large coupling capacity values on chip represents significant issue. Active cells fabricated in ON Semiconductor 0.35 mu m I3T25 3.3 V process were used for experimental verification.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
20201 - Electrical and electronic engineering
Návaznosti výsledku
Projekt
<a href="/cs/project/GA19-22248S" target="_blank" >GA19-22248S: Deterministické, chaotické a stochastické jevy v sub-mikronových integrovaných strukturách</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2022
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
MEASUREMENT, Journal of the International Measurement Confederation (IMEKO)
ISSN
0263-2241
e-ISSN
1873-412X
Svazek periodika
201
Číslo periodika v rámci svazku
9
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
17
Strana od-do
1-17
Kód UT WoS článku
000848146100003
EID výsledku v databázi Scopus
2-s2.0-85136471690