Publication detail

Design of Phase-Locked Loop Using Special Analog Multipliers and Voltage Buffers: Demodulation of Transposed Signals from Sensors

SVOBODA, M. ŠOTNER, R. POLÁK, L. JEŘÁBEK, J. JAIKLA, W. ANDRIUKAITIS, D.

Original Title

Design of Phase-Locked Loop Using Special Analog Multipliers and Voltage Buffers: Demodulation of Transposed Signals from Sensors

Type

journal article in Web of Science

Language

English

Original Abstract

Phase-Locked Loops (PLLs) are versatile electronic circuits that, among others, are used in various sensor applications (e.g., medical) for their ability to generate stable and precise clock signals. This paper introduces a novel PLL-based frequency demodulation system designed for processing very slow signals, ranging from a few Hz to several hundreds of Hz, with amplitudes in the order of several hundreds of millivolts. The system incorporates specialized analog multipliers tailored for essential PLL components, including the voltage-controlled oscillator, phase detector, loop filter with variable DC offset, and base-band filter, all optimized for the purpose of frequency demodulation. These multipliers were fabricated using the TSMC 0.18 µm, 1.8 V CMOS process. The primary design objectives are simplicity, reduced complexity, low power consumption (merely 15 mW), and versatility for applications in sensing engineering. To validate the functionality of the proposed PLL system under practical conditions, we present an example of electrocardiogram signal demodulation, demonstrating its operational performance.

Keywords

CMOS multiplier, frequency modulation, loop filter, phase-locked loop, phase detector, voltage control oscillator.

Authors

SVOBODA, M.; ŠOTNER, R.; POLÁK, L.; JEŘÁBEK, J.; JAIKLA, W.; ANDRIUKAITIS, D.

Released

24. 10. 2024

Publisher

IEEE

ISBN

0018-9456

Periodical

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT

Year of study

2024

Number

73

State

United States of America

Pages from

1

Pages to

12

Pages count

12

URL

https://ieeexplore.ieee.org/document/10648767

BibTex

@article{BUT189130,
  author="Marek {Svoboda} and Roman {Šotner} and Ladislav {Polák} and Jan {Jeřábek} and Winai {Jaikla} and Darius {Andriukaitis}",
  title="Design of Phase-Locked Loop Using Special Analog Multipliers and Voltage Buffers: Demodulation of Transposed Signals from Sensors",
  journal="IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT",
  year="2024",
  volume="2024",
  number="73",
  pages="1--12",
  doi="10.1109/TIM.2024.3427752",
  issn="0018-9456",
  url="https://ieeexplore.ieee.org/document/10648767"
}