Tunable Q matching networks for capacitive ultrasound transmitters
Sign Up to like & getrecommendations! Published in 2021 at "Analog Integrated Circuits and Signal Processing"
DOI: 10.1007/s10470-021-01857-4
Abstract: Airborne capacitive micromachined ultrasonic transducers (CMUTs) have predominantly large input capacitive reactance with small series radiation resistance. To maximize the acoustic power radiation at resonance we employ low cost LC matching networks between the low… read more here.
Keywords: cmut; input; tunable matching; impedance ... See more keywords
Use of Supporting Post Width to Increase the CMUT’s Resonant Frequency
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Access"
DOI: 10.1109/access.2022.3178990
Abstract: A new method is proposed to increase the resonant frequency of a Capacitive Micromachined Ultrasonic Transducer (CMUT) device while keeping the radii unchanged for devices fabricated by sacrificial release (SR) method. The resonant frequency of… read more here.
Keywords: post width; frequency; supporting post; resonant frequency ... See more keywords
Fabrication and Characterization of a Wideband Low-Frequency CMUT Array for Air-Coupled Imaging
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Sensors Journal"
DOI: 10.1109/jsen.2020.3007068
Abstract: The capacitive micro-machined ultrasonic transducer (CMUT) has a good acoustic matching with air. In this paper, a 16-element CMUT array for airborne application is designed and fabricated by SOI wafer bonding process. All the CMUT… read more here.
Keywords: cmut; cmut array; air; coupled imaging ... See more keywords
Towards a Reduced-Wire Interface for CMUT-Based Intravascular Ultrasound Imaging Systems
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Biomedical Circuits and Systems"
DOI: 10.1109/tbcas.2016.2592525
Abstract: Having intravascular ultrasound (IVUS) imaging capability on guide wires used in cardiovascular interventions may eliminate the need for separate IVUS catheters and expand the use of IVUS in a larger portion of the vasculature. High… read more here.
Keywords: wire; cmut; tex math; interface ... See more keywords
Supply-Doubled Pulse-Shaping High Voltage Pulser for CMUT Arrays
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Circuits and Systems II: Express Briefs"
DOI: 10.1109/tcsii.2017.2691676
Abstract: A supply-doubled pulse-shaping high voltage (HV) pulser is presented for medical ultrasound imaging applications, particularly those that use capacitive micromachined ultrasonic transducers (CMUTs). The pulser employs a bootstrap circuit combined with dynamically biased stacked transistors,… read more here.
Keywords: supply; doubled pulse; pulser; cmut ... See more keywords
A Comparative Analysis of CMUT Receiving Architectures for the Design Optimization of Integrated Transceiver Front Ends
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"
DOI: 10.1109/tuffc.2017.2668769
Abstract: A formal comparison between fundamental RX amplifier configurations for capacitive micromachined ultrasonic transducers (CMUTs) is proposed in this paper. The impact on both RX and the pulse-echo frequency response and on the output SNR is… read more here.
Keywords: front ends; frequency; analysis; feedback ... See more keywords
An Optimization and Comparative Study of Air-Coupled CMUT Cells With Circular and Annular Geometries
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"
DOI: 10.1109/tuffc.2017.2739692
Abstract: Air-coupled capacitive micromachined ultrasonic transducers (CMUTs) with annular cell geometry have recently been reported to have a promising transmit sensitivity. This paper reports three optimization schemes, which further improve the transmit sensitivity and also help… read more here.
Keywords: air coupled; cmut; optimization; cell ... See more keywords
A Handheld Imaging Probe for Acoustic Angiography With an Ultrawideband Capacitive Micromachined Ultrasonic Transducer (CMUT) Array
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"
DOI: 10.1109/tuffc.2022.3172566
Abstract: This article presents an imaging probe with a 256-element ultrawideband (UWB) 1-D capacitive micromachined ultrasonic transducer (CMUT) array designed for acoustic angiography (AA). This array was fabricated on a borosilicate glass wafer with a reduced… read more here.
Keywords: capacitive micromachined; imaging probe; micromachined ultrasonic; cmut ... See more keywords
Experimental Characterization of an Embossed Capacitive Micromachined Ultrasonic Transducer Cell
Sign Up to like & getrecommendations! Published in 2020 at "Micromachines"
DOI: 10.3390/mi11020217
Abstract: Capacitive Micromachined Ultrasonic Transducer (CMUT) is a promising ultrasonic transducer in medical diagnosis and therapeutic applications that demand a high output pressure. The concept of a CMUT with an annular embossed pattern on a membrane… read more here.
Keywords: cell; cmut; experimental characterization; ultrasonic transducer ... See more keywords
Fabrication of 2-D Capacitive Micromachined Ultrasonic Transducer (CMUT) Array through Silicon Wafer Bonding
Sign Up to like & getrecommendations! Published in 2022 at "Micromachines"
DOI: 10.3390/mi13010099
Abstract: Capacitive micromachined ultrasound transducers (CMUTs) have broad application prospects in medical imaging, flow monitoring, and nondestructive testing. CMUT arrays are limited by their fabrication process, which seriously restricts their further development and application. In this… read more here.
Keywords: transducer; capacitive micromachined; silicon; cmut array ... See more keywords
Acoustic Streaming Efficiency in a Microfluidic Biosensor with an Integrated CMUT
Sign Up to like & getrecommendations! Published in 2023 at "Micromachines"
DOI: 10.3390/mi14051012
Abstract: The effect of microchannel height on acoustic streaming velocity and capacitive micromachined ultrasound transducer (CMUT) cell damping was investigated. Microchannels with heights ranging from 0.15 to 1.75 mm were used in experiments, and computational microchannel… read more here.
Keywords: acoustic streaming; local minima; streaming; microchannel heights ... See more keywords