A 50-Mb/s CMOS QPSK/O-QPSK Transmitter Employing Injection Locking for Direct Modulation

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dc.contributor.authorDiao, Shengxiko
dc.contributor.authorZheng, Yuanjinko
dc.contributor.authorGao, Yuanko
dc.contributor.authorCheng, San-Jeowko
dc.contributor.authorYuan, Xiaojunko
dc.contributor.authorJe, Minkyuko
dc.contributor.authorHeng, Chun-Huatko
dc.date.accessioned2021-01-06T02:50:05Z-
dc.date.available2021-01-06T02:50:05Z-
dc.date.created2020-04-09-
dc.date.issued2012-01-
dc.identifier.citationIEEE Transactions on Microwave Theory and Techniques, v.60, no.1, pp.120 - 130-
dc.identifier.issn0018-9480-
dc.identifier.urihttp://hdl.handle.net/10203/279612-
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-mu m 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.-
dc.languageEnglish-
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)-
dc.titleA 50-Mb/s CMOS QPSK/O-QPSK Transmitter Employing Injection Locking for Direct Modulation-
dc.typeArticle-
dc.identifier.wosid000298755000013-
dc.identifier.scopusid2-s2.0-84855417994-
dc.type.rimsART-
dc.citation.volume60-
dc.citation.issue1-
dc.citation.beginningpage120-
dc.citation.endingpage130-
dc.citation.publicationnameIEEE Transactions on Microwave Theory and Techniques-
dc.identifier.doi10.1109/tmtt.2011.2174377-
dc.contributor.localauthorJe, Minkyu-
dc.contributor.nonIdAuthorDiao, Shengxi-
dc.contributor.nonIdAuthorZheng, Yuanjin-
dc.contributor.nonIdAuthorGao, Yuan-
dc.contributor.nonIdAuthorCheng, San-Jeow-
dc.contributor.nonIdAuthorYuan, Xiaojun-
dc.contributor.nonIdAuthorHeng, Chun-Huat-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorCMOS-
dc.subject.keywordAuthorendoscopy-
dc.subject.keywordAuthorinjection locking (IL)-
dc.subject.keywordAuthorlow power-
dc.subject.keywordAuthoroffset quadrature phase-shift keying (O-QPSK)-
dc.subject.keywordAuthorpill camera-
dc.subject.keywordAuthorquadrature phase-shift keying (QPSK)-
dc.subject.keywordAuthortransmitter-
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