Please use this identifier to cite or link to this item: https://doi.org/10.1109/TMTT.2011.2174377
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dc.titleA 50-Mb/s CMOS QPSK/O-QPSK transmitter employing injection locking for direct modulation
dc.contributor.authorDiao, S.
dc.contributor.authorZheng, Y.
dc.contributor.authorGao, Y.
dc.contributor.authorCheng, S.-J.
dc.contributor.authorYuan, X.
dc.contributor.authorJe, M.
dc.contributor.authorHeng, C.-H.
dc.date.accessioned2014-10-07T04:22:20Z
dc.date.available2014-10-07T04:22:20Z
dc.date.issued2012-01
dc.identifier.citationDiao, S., Zheng, Y., Gao, Y., Cheng, S.-J., Yuan, X., Je, M., Heng, C.-H. (2012-01). A 50-Mb/s CMOS QPSK/O-QPSK transmitter employing injection locking for direct modulation. IEEE Transactions on Microwave Theory and Techniques 60 (1) : 120-130. ScholarBank@NUS Repository. https://doi.org/10.1109/TMTT.2011.2174377
dc.identifier.issn00189480
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/81841
dc.description.abstractA 50-Mb/s quadrature phase-shift keying (QPSK)/offset quadrature phase-shift keying (O-QPSK) transmitter suitable for biomedical high-quality imaging application is presented. Centered at 915 MHz, the phase modulation is achieved by directly modifying the self-resonant frequency of an LC voltage-controlled oscillator through capacitor bank switching. By eliminating many unnecessary building blocks in the conventional QPSK/O-QPSK transmitter, significant power and area savings are achieved. Implemented in 0.18-μm CMOS technology, it occupies an active core area of 0.28 mm 2. With 305-MHz injection frequency and consuming 5.6 mW under 1.4-V supply, the transmitter achieves error vector magnitude (EVM) of 11.4%/5.97% for O-QPSK/QPSK modulation while delivering output power of -3 dBm at 50 Mb/s. By lowering the injection frequency to 101.67 MHz, it consumes 5.88 mW under the same supply voltages while delivering an output power of -3.3 dBm. The transmitter achieves measured EVM of 6.4% at 50 Mb/s under QPSK modulation. © 2006 IEEE.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1109/TMTT.2011.2174377
dc.sourceScopus
dc.subjectCMOS
dc.subjectendoscopy
dc.subjectinjection locking (IL)
dc.subjectlow power
dc.subjectoffset quadrature phase-shift keying (O-QPSK)
dc.subjectpill camera
dc.subjectquadrature phase-shift keying (QPSK)
dc.subjecttransmitter
dc.typeArticle
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1109/TMTT.2011.2174377
dc.description.sourcetitleIEEE Transactions on Microwave Theory and Techniques
dc.description.volume60
dc.description.issue1
dc.description.page120-130
dc.description.codenIETMA
dc.identifier.isiut000298755000013
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