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

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

Nagarkar, Rishabh Nitin (TU Delft Electrical Engineering, Mathematics and Computer Science)

Pertijs, Michiel (mentor)
van Willigen, Douwe (graduation committee)
Fan, Qinwen (graduation committee)
Spirito, Marco (graduation committee)

Delft University of Technology

Electrical Engineering

2019-09-19

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.

Intra-vascular
single-cable
bipolar
high-voltage
CMOS
transmit switch
bi-directional
ultrasound
isolation

http://resolver.tudelft.nl/uuid:b18f828d-86c7-4730-8ea7-e1d903f012ce

Student theses

master thesis

© 2019 Rishabh Nitin Nagarkar