FREQUENCY SYNTHESIZER HAVING A PLURALITY OF INDEPENDENT OUTPUT TONES
Described is an apparatus that includes a frequency source and a plurality of time domain direct digital synthesizers each having an input connected to an output of the frequency source and an output providing an output frequency signal. A particular time domain direct digital synthesizer includes a...
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| creator | RAPINOJA, Tapio PÄRSSINEN, Aarno STADIUS, Kari XU, Liangge KAUNISTO, Risto RYYNÄNEN, Jussi LINDFORS, Saska |
| description | Described is an apparatus that includes a frequency source and a plurality of time domain direct digital synthesizers each having an input connected to an output of the frequency source and an output providing an output frequency signal. A particular time domain direct digital synthesizer includes a sigma-delta modulator that functions as a second order multi-stage noise shaping sigma-delta modulator. In one exemplary embodiment sigma-delta modulator outputs provide a unitary-weighted word used to switch certain unit capacitors that comprise part of a delay modulator to produce a time-varying delay having a time-averaged value that directly corresponds to a binary value appearing on a plurality of phase accumulator outputs. |
| format | Patent |
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A particular time domain direct digital synthesizer includes a sigma-delta modulator that functions as a second order multi-stage noise shaping sigma-delta modulator. In one exemplary embodiment sigma-delta modulator outputs provide a unitary-weighted word used to switch certain unit capacitors that comprise part of a delay modulator to produce a time-varying delay having a time-averaged value that directly corresponds to a binary value appearing on a plurality of phase accumulator outputs.</description><language>eng ; fre ; ger</language><subject>CALCULATING ; COMPUTING ; COUNTING ; ELECTRIC DIGITAL DATA PROCESSING ; PHYSICS</subject><creationdate>2017</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170510&DB=EPODOC&CC=EP&NR=2351224A4$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,309,782,887,25571,76555</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20170510&DB=EPODOC&CC=EP&NR=2351224A4$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>RAPINOJA, Tapio</creatorcontrib><creatorcontrib>PÄRSSINEN, Aarno</creatorcontrib><creatorcontrib>STADIUS, Kari</creatorcontrib><creatorcontrib>XU, Liangge</creatorcontrib><creatorcontrib>KAUNISTO, Risto</creatorcontrib><creatorcontrib>RYYNÄNEN, Jussi</creatorcontrib><creatorcontrib>LINDFORS, Saska</creatorcontrib><title>FREQUENCY SYNTHESIZER HAVING A PLURALITY OF INDEPENDENT OUTPUT TONES</title><description>Described is an apparatus that includes a frequency source and a plurality of time domain direct digital synthesizers each having an input connected to an output of the frequency source and an output providing an output frequency signal. A particular time domain direct digital synthesizer includes a sigma-delta modulator that functions as a second order multi-stage noise shaping sigma-delta modulator. In one exemplary embodiment sigma-delta modulator outputs provide a unitary-weighted word used to switch certain unit capacitors that comprise part of a delay modulator to produce a time-varying delay having a time-averaged value that directly corresponds to a binary value appearing on a plurality of phase accumulator outputs.</description><subject>CALCULATING</subject><subject>COMPUTING</subject><subject>COUNTING</subject><subject>ELECTRIC DIGITAL DATA PROCESSING</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2017</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHBxC3INDHX1c45UCI70C_FwDfaMcg1S8HAM8_RzV3BUCPAJDXL08QyJVPB3U_D0c3ENcAUSfiEK_qEhAaEhCiH-fq7BPAysaYk5xam8UJqbQcHNNcTZQze1ID8-tbggMTk1L7Uk3jXAyNjU0MjIxNHEmAglAEP_K9o</recordid><startdate>20170510</startdate><enddate>20170510</enddate><creator>RAPINOJA, Tapio</creator><creator>PÄRSSINEN, Aarno</creator><creator>STADIUS, Kari</creator><creator>XU, Liangge</creator><creator>KAUNISTO, Risto</creator><creator>RYYNÄNEN, Jussi</creator><creator>LINDFORS, Saska</creator><scope>EVB</scope></search><sort><creationdate>20170510</creationdate><title>FREQUENCY SYNTHESIZER HAVING A PLURALITY OF INDEPENDENT OUTPUT TONES</title><author>RAPINOJA, Tapio ; PÄRSSINEN, Aarno ; STADIUS, Kari ; XU, Liangge ; KAUNISTO, Risto ; RYYNÄNEN, Jussi ; LINDFORS, Saska</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP2351224A43</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2017</creationdate><topic>CALCULATING</topic><topic>COMPUTING</topic><topic>COUNTING</topic><topic>ELECTRIC DIGITAL DATA PROCESSING</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>RAPINOJA, Tapio</creatorcontrib><creatorcontrib>PÄRSSINEN, Aarno</creatorcontrib><creatorcontrib>STADIUS, Kari</creatorcontrib><creatorcontrib>XU, Liangge</creatorcontrib><creatorcontrib>KAUNISTO, Risto</creatorcontrib><creatorcontrib>RYYNÄNEN, Jussi</creatorcontrib><creatorcontrib>LINDFORS, Saska</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>RAPINOJA, Tapio</au><au>PÄRSSINEN, Aarno</au><au>STADIUS, Kari</au><au>XU, Liangge</au><au>KAUNISTO, Risto</au><au>RYYNÄNEN, Jussi</au><au>LINDFORS, Saska</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>FREQUENCY SYNTHESIZER HAVING A PLURALITY OF INDEPENDENT OUTPUT TONES</title><date>2017-05-10</date><risdate>2017</risdate><abstract>Described is an apparatus that includes a frequency source and a plurality of time domain direct digital synthesizers each having an input connected to an output of the frequency source and an output providing an output frequency signal. A particular time domain direct digital synthesizer includes a sigma-delta modulator that functions as a second order multi-stage noise shaping sigma-delta modulator. In one exemplary embodiment sigma-delta modulator outputs provide a unitary-weighted word used to switch certain unit capacitors that comprise part of a delay modulator to produce a time-varying delay having a time-averaged value that directly corresponds to a binary value appearing on a plurality of phase accumulator outputs.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
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| subjects | CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING PHYSICS |
| title | FREQUENCY SYNTHESIZER HAVING A PLURALITY OF INDEPENDENT OUTPUT TONES |
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