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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