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- W4313015570 abstract "With rapid development of Internet of Things, there is high demand for miniaturized biochemical sensors, which enable a digital-controlled connection and portable integration. In this work, we report an ASIC interface for capacitive micromachined ultrasonic transducers (CMUTs), offering multi-channel monitoring of frequency shifts and supplying high-voltage (HV) source. Previously reported CMUTs-based biochemical sensors required a peripheral power source to provide a DC driving voltage (e.g.,10-50 V), which was higher than the common circuit supply (e.g., 1.2-5 V). This resulted in additional circuit footprints and parasitic effects, especially for high frequency. Instead, we proposed an ASIC interface designed through TSMC $0.18-mu{m}$ HV BCD process with a die size of 2×2 mm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> . Four-channel oscillators are proposed to track frequency shifts of CMUT resonators with a resonant frequency of 1.8MHz, and a start-up period up to $100mu$ s and a phase noise of −38.73dBc/Hz at low offset of 100 Hz were observed, while consuming an average total power of $142.12mumathrm{W}$ in continuous mode. A PMOS-based HV charge pump is presented to generate a voltage boosting of ~50 V with a 1.8-V input source, which enables tuning clock signals by implementing four-parallel ring oscillators with the frequency of 20-50 MHz. The proposed ASIC integrated with CMUTs is a molecules." @default.
- W4313015570 created "2023-01-05" @default.
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- W4313015570 date "2022-05-28" @default.
- W4313015570 modified "2023-10-01" @default.
- W4313015570 title "An ASIC Interface for CMUTs-based Biosensors with High Voltage Boosting and Oscillator" @default.
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- W4313015570 doi "https://doi.org/10.1109/iscas48785.2022.9937225" @default.
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