Sporadically-driven clock-less in-pixel multi-bit energy discriminator for X-ray spectrometry CMOS PCD imagers

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dc.contributor.authorKim, Hyun Sikko
dc.date.accessioned2019-03-19T01:55:46Z-
dc.date.available2019-03-19T01:55:46Z-
dc.date.created2019-03-08-
dc.date.issued2016-09-
dc.identifier.citationELECTRONICS LETTERS, v.52, no.19-
dc.identifier.issn0013-5194-
dc.identifier.urihttp://hdl.handle.net/10203/251858-
dc.description.abstractA compact size and low-power multi-bit energy discriminator circuit is presented for X-ray spectrometry CMOS photon-counting detector (PCD) pixels. Because the circuit design is based on an asynchronous linear search, the discriminator with only a single-comparator classifies a sporadically incoming photon into multiple energy-bins, resulting in high spatial resolution and functionality of material-selective imaging. The proposed pixel power required to perform a minimal linear search is significantly less than the power of a conventional parallel search implemented in a flash-type discriminator. A prototype is fabricated in a 130-nm CMOS, and a 3-bit discriminator occupies only 23 x 60 m(2). The circuit dissipates a static power of 1 W with a power supply of 3.3 V (analogue) and 1.2 V (digital). The inaccuracy of energy-binning is measured to be 2.6-3.3 mV rms.-
dc.languageEnglish-
dc.publisherINST ENGINEERING TECHNOLOGY-IET-
dc.titleSporadically-driven clock-less in-pixel multi-bit energy discriminator for X-ray spectrometry CMOS PCD imagers-
dc.typeArticle-
dc.identifier.wosid000384014300010-
dc.identifier.scopusid2-s2.0-84986903137-
dc.type.rimsART-
dc.citation.volume52-
dc.citation.issue19-
dc.citation.publicationnameELECTRONICS LETTERS-
dc.identifier.doi10.1049/el.2016.2629-
dc.contributor.localauthorKim, Hyun Sik-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorX-ray imaging-
dc.subject.keywordAuthorCMOS image sensors-
dc.subject.keywordAuthorX-ray spectroscopy-
dc.subject.keywordAuthorlow-power electronics-
dc.subject.keywordAuthorphoton counting-
dc.subject.keywordAuthorintegrated circuit design-
dc.subject.keywordAuthorcomparators (circuits)-
dc.subject.keywordAuthordiscriminators-
dc.subject.keywordAuthorsporadically-driven clock-less in-pixel multibit energy discriminator circuit-
dc.subject.keywordAuthorX-ray spectrometry CMOS PCD imager-
dc.subject.keywordAuthorphoton-counting detector-
dc.subject.keywordAuthorasynchronous linear search-
dc.subject.keywordAuthorsingle-comparator-
dc.subject.keywordAuthormultiple energy-bins-
dc.subject.keywordAuthormaterial-selective imaging-
dc.subject.keywordAuthorminimal linear search-
dc.subject.keywordAuthorparallel search-
dc.subject.keywordAuthorflash-type discriminator-
dc.subject.keywordAuthorsize 130 nm-
dc.subject.keywordAuthorword length 3 bit-
dc.subject.keywordAuthorpower 1 muW-
dc.subject.keywordAuthorvoltage 3-
dc.subject.keywordAuthor3 V-
dc.subject.keywordAuthorvoltage 1-
dc.subject.keywordAuthor2 V-
dc.subject.keywordAuthorvoltage 2-
dc.subject.keywordAuthor6 mV to 3-
dc.subject.keywordAuthor3 mV-
dc.subject.keywordPlusDETECTOR-
dc.subject.keywordPlusARRAYS-
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