Detail publikace

Design of Signal Generators Using Active Elements Developed in I3T25 CMOS Technology Single IC Package for Illuminance to Frequency Conversion

ŠOTNER, R. JEŘÁBEK, J. POLÁK, L. KLEDROWETZ, V. PROKOP, R.

Originální název

Design of Signal Generators Using Active Elements Developed in I3T25 CMOS Technology Single IC Package for Illuminance to Frequency Conversion

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

This paper presents a compact and simple design of adjustable triangular and square wave functional generators employing fundamental cells fabricated on a single integrated circuit (IC) package. Two solutions have electronically tunable repeating frequency. The linear adjustability of repeating frequency was verified in the range between 17 and 264 kHz. The main benefits of the proposed generator are the follows: A simple adjustment of the repeating frequency by DC bias current, Schmitt trigger (threshold voltages) setting by DC driving voltage, and output levels in hundreds of mV when the complementary metal-oxide semiconductor (CMOS) process with limited supply voltage levels is used. These generators are suitable to provide a simple conversion of illuminance to frequency of oscillation that can be employed for illuminance measurement and sensing in the agriculture applications. Experimental measurements proved that the proposed concept is usable for sensing of illuminance in the range from 1 up to 500 lx. The change of illuminance within this range causes driving of bias current between 21 and 52 mu A that adjusts repeating frequency between 70 and 154 kHz with an error up to 10% between the expected and real cases.

Klíčová slova

CMOS active element; comparator; electronic adjusting; frequency tunability; functional generator; illuminance sensing; integrator; square and triangular waves

Autoři

ŠOTNER, R.; JEŘÁBEK, J.; POLÁK, L.; KLEDROWETZ, V.; PROKOP, R.

Vydáno

21. 2. 2020

Nakladatel

MDPI

Místo

BASEL

ISSN

1424-8220

Periodikum

SENSORS

Ročník

20

Číslo

4

Stát

Švýcarská konfederace

Strany od

1

Strany do

13

Strany počet

13

URL

https://www.mdpi.com/1424-8220/20/4/1198/pdf

Plný text v Digitální knihovně

http://hdl.handle.net/11012/188953

BibTex

@article{BUT163586,
  author="Roman {Šotner} and Jan {Jeřábek} and Ladislav {Polák} and Vilém {Kledrowetz} and Roman {Prokop}",
  title="Design of Signal Generators Using Active Elements Developed in I3T25 CMOS Technology Single IC Package for Illuminance to Frequency Conversion",
  journal="SENSORS",
  year="2020",
  volume="20",
  number="4",
  pages="1--13",
  doi="10.3390/s20041198",
  issn="1424-8220",
  url="https://www.mdpi.com/1424-8220/20/4/1198/pdf"
}