TY - GEN
T1 - Ultra-Low Power High Sensitivity Photoplethysmography Sensor Based on Inverted Cascode Transimpedance Amplifier Using Quasi-Floating Gate
AU - Ibrahem, Hesham
AU - Atef, Mohamed
AU - Khaled, Elsayed Esam M.
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/4
Y1 - 2019/4
N2 - 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.
AB - 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.
KW - Oxygen saturation
KW - Photoplethysmography
KW - Pulse oximetry
KW - Transimpedance Amplifier
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U2 - 10.1109/NRSC.2019.8734533
DO - 10.1109/NRSC.2019.8734533
M3 - Conference contribution
AN - SCOPUS:85068048041
T3 - National Radio Science Conference, NRSC, Proceedings
SP - 360
EP - 367
BT - Proceedings of 2019 36th National Radio Science Conference, NRSC 2019
A2 - Sadek, Rowayda
A2 - Goudah, Ahmad Abdullatif
A2 - ElDiasty, Sherif
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 36th National Radio Science Conference, NRSC 2019
Y2 - 16 April 2019 through 18 April 2019
ER -