Publication detail

Short range electromagnetic interface using 0.35 μm CMOS blocks for temperature monitoring in isolated areas

ŠOTNER, R. JEŘÁBEK, J. POLÁK, L. PROKOP, R. AYTEN, U. JAIKLA, W.

Original Title

Short range electromagnetic interface using 0.35 μm CMOS blocks for temperature monitoring in isolated areas

Type

journal article in Web of Science

Language

English

Original Abstract

Introduction: Infra-red (IR) and visible light (VL) based systems developed for transmission of information about physical quantities (e.g. humidity, temperature) out from closed areas, cannot be effectively employed in case of specific conditions in a targeted environment (because of fog or vapor for example). Objectives: In this work, we introduce a concept of wireless short-range transmitter and receiver to sense physical quantities, for instance temperature, with slow variation. The proposed concept is able to transmit analog-based information from isolated environments (e.g. aquariums or environments for plant growing) with high immunity against vapor and fog that limits standard optical (laser, IR band) methods of communication. Methods: In this work, a new concept of short range radiofrequency (RF) communication device consisting of transmitting and receiving parts build from active devices fabricated in 0.35 μm I3T25 3.3 V CMOS process and ferrite antennas is selected. RF part uses medium-wave propagation within 10 mm distance at frequency 700 kHz. Such an approach offers minimal path loss of the radiated energy of a signal and low-gain amplification required for restoration of similar levels as available at the transmitting side. Results: The processing of base-band signals of simple (sine wave) and complex (electrocardiogram) character was verified experimentally through the system. Application example of temperature monitoring in a closed environment, based on a temperature sensor (thermistor), verifies operationability in temperature range from 10 °C up to 50 °C. Conclusion: Compared to state-of-the-art solution, the presented concept has several advantages, for instance: less complexity; using of simpler type of modulation and demodulation; lower power consumption and significantly reduced issues caused by an environment with special transmission conditions (e.g. fog and vapor). The obtained results are in good agreement with expectations. Among others, the presented system brings beneficial performances for similar applications targeting on monitoring of low-frequency or slowly varying signals

Keywords

Active elements; Amplitude modulation; ASIC; CMOS; Electronic adjustment; Medium radiofrequency wave; Temperature monitoring

Authors

ŠOTNER, R.; JEŘÁBEK, J.; POLÁK, L.; PROKOP, R.; AYTEN, U.; JAIKLA, W.

Released

5. 2. 2022

Publisher

Elsevier

Location

AMSTERDAM, NETHERLANDS

ISBN

2090-1232

Periodical

Journal of Advanced Research

Year of study

41

Number

11

State

Arab Republic of Egypt

Pages from

49

Pages to

62

Pages count

14

URL

https://www.sciencedirect.com/science/article/pii/S2090123222000182

Full text in the Digital Library

http://hdl.handle.net/11012/204107

BibTex

@article{BUT177498,
  author="Roman {Šotner} and Jan {Jeřábek} and Ladislav {Polák} and Roman {Prokop} and Umut E. {Ayten} and Winai {Jaikla}",
  title="Short range electromagnetic interface using 0.35 μm CMOS blocks for temperature monitoring in isolated areas",
  journal="Journal of Advanced Research",
  year="2022",
  volume="41",
  number="11",
  pages="49--62",
  doi="10.1016/j.jare.2022.01.005",
  issn="2090-1232",
  url="https://www.sciencedirect.com/science/article/pii/S2090123222000182"
}