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• W4312694549 abstract "This article presents the first fully integrated 2-D array of electronic-photonic ultrasound sensors targeting low-power miniaturized ultrasound probes for endoscopic applications. Fabricated in a zero-change 45-nm CMOS-silicon-on-insulator (SOI) technology, this 5.53 <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$times $ </tex-math></inline-formula> 3.03 mm electronic-photonic system on chip (EPSoC) utilizes micro-ring resonators (MRRs) as ultrasound sensors instead of the traditional piezoelectric or capacitive micromachined transducers (PMUTs or CMUTs). The photonic nature of the sensor enables remoting of the power-hungry receive electronics outside the probe tip, thus lowering the power dissipation inside the human body. Moreover, it eliminates electrical cabling, replacing the bulky micro-coax cables with thinner optic fibers. This EPSoC also reduces fiber count by 8 <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$times $ </tex-math></inline-formula> with zero power and area overhead by performing wavelength division multiplexed interrogation of MRR sensors coupled onto the same waveguide in lieu of sub-array beamforming or in-pixel digitization. Leveraging the monolithic integration of photonic devices with CMOS circuitry, a complete receiver (RX) unit is built right next to the sensor MRRs, including a programmable gain transimpedance amplifier (TIA) and background current cancellation digital-to-analog converters ( <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$I_{text {DAC}}text{s}$ </tex-math></inline-formula> ), which allow for a sensor operating range of 74 dB. A 9-bit SAR ADC performs on-chip A/D conversion making for a self-contained endoscopic ultrasound receiver system. The photonic sensing element demonstrates 7.3 mV/kPa sensitivity while consuming 0.43 mW of power and occupying 0.01 mm of area. The functionality of the fabricated chip has been demonstrated in ultrasonic receiver beamforming experiments." @default.
• W4312694549 created "2023-01-05" @default.
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• W4312694549 date "2023-06-01" @default.
• W4312694549 modified "2023-10-17" @default.
• W4312694549 title "Fully Integrated Electronic-Photonic Ultrasound Receiver Array for Endoscopic Applications in a Zero-Change 45-nm CMOS-SOI Process" @default.
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• W4312694549 doi "https://doi.org/10.1109/jssc.2022.3222829" @default.
• W4312694549 hasPublicationYear "2023" @default.
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