Name
Abstract | ||
|---|---|---|
This paper presents an integrated readout dedicated to sensing transcutaneous oxygen, a first of its kind. The readout circuit employs a fluorescence-based method to sense the oxygen molecules diffusing through the skin. The system uses a platinum porphyrin thin film, a blue light-emitting diode (LED) that excites the thin film, and a photodiode (PD) that captures the red light emitted from the thin film. The presence of oxygen quenches the intensity and the lifetime of red light. The readout integrated circuit (IC), which is integrated in a 0.18 μm 5 V CMOS process, excites the thin film and senses the current flowing through the PD. The analog front-end converts the detected current to a voltage while providing a variable gain of 59 kΩ-0.94 MΩ. The LED driver circuit generates current as high as 40 mA. To decrease the power consumption of the readout, the LED can be pulsed at 16 us intervals (based on the 1.7 kΩ input impedance of the transimpedance amplifier and 20 pF PD capacitance). The readout IC consumes 631 μW power and occupies 1.04 mm
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. This paper also shows ex vivo measurements. |
Year | DOI | Venue |
|---|---|---|
2020 | 10.1109/CICC48029.2020.9075881 | 2020 IEEE Custom Integrated Circuits Conference (CICC) |
Keywords | DocType | ISSN |
integrated readout circuit,transcutaneous oxygen sensing wearable device,fluorescence-based method,oxygen molecules,blue light-emitting diode,red light intensity,readout integrated circuit,CMOS process,LED driver circuit,PD capacitance,readout IC,platinum porphyrin thin film,thin film,photodiode,size 0.18 mum,voltage 5.0 V,power 631.0 muW,capacitance 20.0 pF,resistance 59 kohm to 0.94 Mohm,time 16 mus,resistance 1.7 kohm | Conference | 0886-5930 |
ISBN | Citations | PageRank |
978-1-7281-6032-0 | 0 | 0.34 |
References | Authors | |
1 | 3 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Ian Costanzo | 1 | 0 | 0.34 |
| Devdip Sen | 2 | 0 | 2.03 |
| Ulkuhan Guler | 3 | 4 | 4.16 |