Abstract
This paper presents an approach to time-multiplexing multiple receive signals in a miniature ultrasound probe onto a single micro-coaxial cable. The resulting reduction in the number of receive cables alleviates the design of high-element-count endoscope- or catheter-based ultrasound probes. A prototype multiplexing system is presented that employs a custom multiplexing chip that uses current-mode drivers to combine four receive channels, sampled at 25 MHz each, on a single 3-m micro-coaxial cable. On the system-side of the cable, a transimpedance amplifier turns the multiplexed signal back into a voltage, after which it is digitized and equalized to correct for channel-to-channel crosstalk due to non-idealities of the cable. The chip has been implemented in a 0.18 μm CMOS process and consumes less than 1 mW per input channel. Experimental results show that the system can successfully convey 6 MHz Gaussian-shaped pulses applied to the four input channels of the multiplexing chip to the system with a channel-to-channel crosstalk below -31 dB.
Original language | English |
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Title of host publication | Proceedings of the IEEE International Ultrasonics Symposium, IUS 2015 |
Editors | S Emelianov |
Place of Publication | Piscataway, NJ, USA |
Publisher | IEEE Society |
Pages | 1-4 |
Number of pages | 4 |
ISBN (Print) | 978-1-4799-8182-3 |
DOIs | |
Publication status | Published - 2015 |
Event | 2015 IEEE International Ultrasonics Symposium, IUS - Taipei International Convention Center, Taipei, Taiwan Duration: 21 Jan 2015 → 24 Oct 2015 http://10times.com/ius |
Publication series
Name | |
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Publisher | IEEE |
Conference
Conference | 2015 IEEE International Ultrasonics Symposium, IUS |
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Abbreviated title | IUS 2015 |
Country/Territory | Taiwan |
City | Taipei |
Period | 21/01/15 → 24/10/15 |
Internet address |
Keywords
- signal multiplexing
- cable-count reduction
- micro-coaxial cable
- equalization