This paper deals with the design of a low power, high-gain, low noise and high-dynamic range receiver dedicated for photoplethysmography (PPG) signal sensing. A current measurement system utilizing a large DC cancelation block, implemented in 180nm CMOS technology. The shunt feedback trans-impedance amplifier (TIA) is designed to detect and sense low currents, producing a voltage output. It exhibits a noise floor of 39.7 pArms within the frequency range of 0.5-10Hz. The receiver gain is 147.6dBΩ. The receiver incorporates a fine and coarse steps gain control block (FaCGC) and a DC cancelation block capable of handling up to 100µA, thereby enabling a wide dynamic range. The proposed system exhibits characteristics such as low noise and wide dynamic range, rendering it well-suited for the precise measurement of ultra-low current. Consequently, this system holds significant potential for application in biosensor technology. The chip has a footprint of 0.121mm2 area and operates with a power consumption of 40.14 micro-watts, drawing power from supply voltages of ±0.9 volts. The post-layout simulation reveals a lower frequency limit below 1mHz, while the upper limits of its application band can be extended up to 100 Hz.
Shoeibi, F., نجفی اقدم, ., & Ebrahimi, A. (2023). A 147dBΩ, High Dynamic Range Analog Front End for PPG Signal Acquisition with Fine and Coarse Steps Automatic Gain Control. TABRIZ JOURNAL OF ELECTRICAL ENGINEERING, (), -. doi: 10.22034/tjee.2023.58147.4705
MLA
Fatemeh Shoeibi; اسماعیل نجفی اقدم; Afshin Ebrahimi. "A 147dBΩ, High Dynamic Range Analog Front End for PPG Signal Acquisition with Fine and Coarse Steps Automatic Gain Control". TABRIZ JOURNAL OF ELECTRICAL ENGINEERING, , , 2023, -. doi: 10.22034/tjee.2023.58147.4705
HARVARD
Shoeibi, F., نجفی اقدم, ., Ebrahimi, A. (2023). 'A 147dBΩ, High Dynamic Range Analog Front End for PPG Signal Acquisition with Fine and Coarse Steps Automatic Gain Control', TABRIZ JOURNAL OF ELECTRICAL ENGINEERING, (), pp. -. doi: 10.22034/tjee.2023.58147.4705
VANCOUVER
Shoeibi, F., نجفی اقدم, ., Ebrahimi, A. A 147dBΩ, High Dynamic Range Analog Front End for PPG Signal Acquisition with Fine and Coarse Steps Automatic Gain Control. TABRIZ JOURNAL OF ELECTRICAL ENGINEERING, 2023; (): -. doi: 10.22034/tjee.2023.58147.4705