دانلود رایگان مقالهA Front-End ASIC With High-Voltage Transmit Switching and Receive Digitization for 3-D Forward-Looking Intravascular Ultrasound Imaging
IEEE JOURNAL OF SOLID-STATE CIRCUITS, 2018
A Front-End ASIC With High-Voltage Transmit Switching and Receive Digitization for 3-D Forward-Looking Intravascular Ultrasound Imaging
Abstract:
This paper presents an area- and power-efficient application-specified integrated circuit (ASIC) for 3-D forwardlooking intravascular ultrasound imaging. The ASIC is intended to be mounted at the tip of a catheter, and has a circular active area with a diameter of 1.5 mm on the top of which a 2-D array of piezoelectric transducer elements is integrated. It requires onlyfour micro-coaxial cables to interface 64 receive (RX) elements and 16 transmit (TX) elements with an imaging system. To do so, it routes high-voltage (HV) pulses generated by the system to selected TX elements using compact HV switch circuits, digitizes the resulting echo signal received by a selected RX element locally, and employs an energy-efficient load-modulation datalink to return the digitized echo signal to the system in a robust manner. A multi-functional command line provides the required sampling clock, configuration data, and supply voltage for the HV switches. The ASIC has been realized in a 0.18-µm HV CMOS technology and consumes only 9.1 mW. Electrical measurements show 28-V HV switching and RX digitization with a 16-MHz bandwidth and 53-dB dynamic range. Acoustical measurements demonstrate successful pulse transmission and reception. Finally, a 3-D ultrasound image of a three-needle phantom is generated to demonstrate the imaging capability.
Index Terms— Cable-count reduction, high-voltage (HV) switching, intravascular ultrasound (IVUS) imaging, piezoelectrical transducer, receive digitization.
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www.iranswitching.ir/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa%d8%a7%d9%86%da%af%d9%84%db%8c%d8%b3%db%8c%d8%b3%d9%88%d8%a6%db%8c%da%86%db%8c%d9%86%da%af/%d8%af%d8%a7%d9%86%d9%84%d9%88%d8%af%d8%b1%d8%a7%db%8c%da%af%d8%a7%d9%86%d9%85%d9%82%d8%a7%d9%84%d9%87afrontendasicwithhighvoltagetransmitswitchingandreceivedigitization-for-3-d-forward-l
 for 3-D forwardlooking intravascular ultrasound imaging. The ASIC is intended
to be mounted at the tip of a catheter, and has a circular active
area with a diameter of 1.5 mm on the top of which a 2-D array
of piezoelectric transducer elements is integrated.){kind=link}
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