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Electronic interfaces ISBN 87-89935-50-0 257

Summary: M3S4
Electronic interfaces
ISBN 87-89935-50-0 257
The 14
European Conference on Solid-State Transducers
August 27-30, 2000, Copenhagen, Denmark
A Beam-Forming Transmit ASIC for Driving Ultrasonic Arrays
John V. Hatfield, Munir Kulaib Al-Absi and Kwet Seng Chai
Department Electrical Engineering and Electronics, UMIST, PO Box 88,
Manchester, M60 1QD, UK
e-mail: j.hatfield@umist.ac.uk http://www.ee.umist.ac.uk
Summary. This paper describes the design of a programmable 8-channel integrated circuit for
driving ultrasonic array transducers. The IC is capable of generating variable delay lengths of up
to 65Ás in steps of 1ns. Integrated on the same chip is an array of eight high voltage pulser
circuits (up to 100V). The output pulse width can also be set to match the transducer operating
frequency. A minimum width of 20ns is possible and the rise and fall times are typically 5 ns and 7
ns. It can also be programmed to give bursts of up to 16 repetitions to facilitate Doppler imaging.
Keywords: ASIC, ultrasonic, pulser


Source: Al-Absi, Munir A. - Electrical Engineering Department, King Fahd University of Petroleum and Minerals


Collections: Engineering