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A High-Resolution Reconfigurable Sigma-Delta Digital-to-Analog Converter for RF Pulse Transmission in MRI Scanners
COMSATS Inst Informat Technol, Pakistan.
Chungbuk Natl Univ, South Korea.
COMSATS Inst Informat Technol, Pakistan.
Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-2144-6795
2017 (English)In: 2017 IEEE NORDIC CIRCUITS AND SYSTEMS CONFERENCE (NORCAS): NORCHIP AND INTERNATIONAL SYMPOSIUM OF SYSTEM-ON-CHIP (SOC), IEEE , 2017Conference paper, Published paper (Refereed)
Abstract [en]

In Magnetic Resonance Imaging (MRI) scanners Radio Frequency (RF) signals are important to accurately excite target tissues. RF signals depend on Digital-to-Analog Converters (DAC) output which depends on sequence numbers issued from control room. This paper presents a sigma-delta modulator (SDM), followed by a DAC architecture that can be reconfigured while an MRI scanner is operating and pipelining is not required. The reconfigurable SDM is implemented in a 65nm CMOS technology and operates at an oversampling ratio (OSR) of 64 times. The modulator clocks at 2 GHz frequency with a 1.2-V supply voltage. The modulator occupies an area of 2 9 x 3 2 sq.mu m and consumes 319.1 mW. The proposed SDM-DAC is well-suited for the RF transmitter in the MRI scanner. The reconfigurability feature allows to select different resolutions for various types of RF pulses and can thereby target specific tissues more accurately. (1)

Place, publisher, year, edition, pages
IEEE , 2017.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-145843DOI: 10.1109/NORCHIP.2017.8124973ISI: 000425049100029ISBN: 978-1-5386-2844-7 (print)OAI: oai:DiVA.org:liu-145843DiVA, id: diva2:1192079
Conference
IEEE Nordic Circuits and Systems Conference (NORCAS) / NORCHIP and International Symposium of System-on-Chip (SoC)
Available from: 2018-03-21 Created: 2018-03-21 Last updated: 2018-11-08

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf