Ultra-Low Power High Sensitivity Photoplethysmography Sensor Based on Inverted Cascode Transimpedance Amplifier Using Quasi-Floating Gate

Hesham Ibrahem, Mohamed Atef, Elsayed Esam M. Khaled

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

This paper presents a design and simulation results for a Photoplethysmography (PPG) sensor front-end circuitry. An ultra-low power consumption is achieved since proposed integrated inverted cascode Transimpedance Amplifier (TIA) is incorporating a quasi-floating gate (QFG) topology. The proposed TIA has 0.3 Hz high-pass frequency that is less than the lowest frequency of PPG signal. The designed transimpedance gain of the proposed TIA is 119.9 dBΩ using a large area photodiode having a 20 pF capacitance. The TIA is followed by a Post Amplifier (PA) to increase the gain to 148.5 dBΩ. A buffer amplifier is desired as a last stage to drive the load capacitance of the next stage analog to digital converter (ADC). This proposed sensor system bandwidth is 4.5 kHz with an integrated input referred noise of 94 pA that is the average valued from Monte-carlo simulation. The total power consumption by the sensor front-end is approximately 30 μW.

Original languageEnglish
Title of host publicationProceedings of 2019 36th National Radio Science Conference, NRSC 2019
EditorsRowayda Sadek, Ahmad Abdullatif Goudah, Sherif ElDiasty
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages360-367
Number of pages8
ISBN (Electronic)9781728107530
DOIs
Publication statusPublished - Apr 2019
Externally publishedYes
Event36th National Radio Science Conference, NRSC 2019 - Port Said, Egypt
Duration: Apr 16 2019Apr 18 2019

Publication series

NameNational Radio Science Conference, NRSC, Proceedings
Volume2019-April

Conference

Conference36th National Radio Science Conference, NRSC 2019
Country/TerritoryEgypt
CityPort Said
Period4/16/194/18/19

Keywords

  • Oxygen saturation
  • Photoplethysmography
  • Pulse oximetry
  • Transimpedance Amplifier

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Ultra-Low Power High Sensitivity Photoplethysmography Sensor Based on Inverted Cascode Transimpedance Amplifier Using Quasi-Floating Gate'. Together they form a unique fingerprint.

Cite this