An ASIC with Bipolar High-Voltage Transmit Switching for a Single-Cable Intra-Vascular Ultrasound Probe

Master Thesis (2019)
Author(s)

R.N. Nagarkar (TU Delft - Electrical Engineering, Mathematics and Computer Science)

Contributor(s)

MAP Pertijs – Mentor (TU Delft - Electronic Instrumentation)

Douwe Van van Willigen – Graduation committee member (TU Delft - Electronic Instrumentation)

Qinwen Fan – Graduation committee member (TU Delft - Electronic Instrumentation)

Marco Spirito – Graduation committee member (TU Delft - Electronics)

Faculty
Electrical Engineering, Mathematics and Computer Science
Copyright
© 2019 Rishabh Nitin Nagarkar
More Info
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Publication Year
2019
Language
English
Copyright
© 2019 Rishabh Nitin Nagarkar
Graduation Date
19-09-2019
Awarding Institution
Delft University of Technology
Programme
['Electrical Engineering']
Faculty
Electrical Engineering, Mathematics and Computer Science
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Abstract

An ASIC is presented for intra-vascular ultrasound imaging. Despite being connected via a single coaxial cable, it is able to pass arbitrary high voltage bipolar signals to the transducers for acoustic imaging. The thesis talks about the need to reduce the cable count to one and reviews the existing work in literature. It builds up on an existing single cable design and focuses on the transmit part to make it compatible to a large number of ultrasound imaging modes by allowing it to pass high frequency signals up to 20MHz and bipolar signal voltages up to ±25V . The chip is phantom powered and thus its power supply and signals are transmitted on the same cable. The transmit switch designed for this ASIC is powered by and controlled by an on-chip low voltage supply and circuitry. The prototype ASIC has been designed in TSMC 180nm HV BCD Gen2 technology. This single cable design has 16 elements for transmit and 64 elements in the receive mode and was evaluated using simulations.

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