{"id":387392,"date":"2022-06-22T08:13:08","date_gmt":"2022-06-22T06:13:08","guid":{"rendered":"https:\/\/www.ecinews.fr\/?p=387392"},"modified":"2022-06-22T08:13:08","modified_gmt":"2022-06-22T06:13:08","slug":"synthetiseur-a-faible-gigue-pour-applications-de-conversion-de-donnees-de-lordre-du-gech-s","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/synthetiseur-a-faible-gigue-pour-applications-de-conversion-de-donnees-de-lordre-du-gech-s\/","title":{"rendered":"Synth\u00e9tiseur \u00e0 faible gigue pour applications de conversion de donn\u00e9es de l\u2019ordre du G\u00e9ch\/s"},"content":{"rendered":"<p>Ce nouveau\u00a0composant assure\u00a0un excellent rapport signal\/bruit\u00a0(SNR\u00a0\u2013\u00a0Signal-to-Noise Ratio)\u00a0en\u00a0g\u00e9n\u00e9rant une source d\u2019horloge ultra-propre pour\u00a0commander\u00a0le processus d\u2019\u00e9chantillonnage du signal.\u00a0Les\u00a0r\u00e9cepteurs et\u00a0les\u00a0\u00e9metteurs large bande de\u00a0nouvelle\u00a0g\u00e9n\u00e9ration\u00a0peuvent\u00a0ainsi\u00a0utiliser\u00a0les\u00a0niveaux\u00a0sup\u00e9rieurs\u00a0de\u00a0la plage\u00a0dynamique, ce qui\u00a0augmente la\u00a0sensibilit\u00e9\u00a0en\u00a0r\u00e9ception\u00a0et\u00a0la\u00a0puret\u00e9 spectrale\u00a0en \u00e9mission.\u00a0Ces\u00a0performances\u00a0sont\u00a0obtenues\u00a0gr\u00e2ce\u00a0\u00e0 la\u00a0gigue inf\u00e9rieure\u00a0\u00e0 18\u2009femtosecondes efficaces (fs\u2009rms)\u00a0produite par le\u00a0synth\u00e9tiseur ADF4377\u00a0en\u00a0raison\u00a0du faible bruit de phase normalis\u00e9 dans la bande\u00a0passante\u00a0(-239dBc\/Hz), du bruit 1\/f\u00a0normalis\u00e9\u00a0(-147dBc\/Hz)\u00a0et du\u00a0niveau\u00a0plancher de bruit\u00a0VCO\u00a0large bande de -160dBc\/Hz.<\/p>\n<p>Le synth\u00e9tiseur ADF4377\u00a0est\u00a0id\u00e9alement\u00a0adapt\u00e9\u00a0\u00e0 des\u00a0applications telles que les radars, l\u2019instrumentation et les r\u00e9cepteurs large bande\u00a0o\u00f9\u00a0plusieurs convertisseurs de donn\u00e9es ou num\u00e9riseurs frontaux \u00e0 signal\u00a0mixte (MxFE)\u00a0doivent fonctionner de concert. L\u2019ADF4377 simplifie consid\u00e9rablement les\u00a0t\u00e2ches\u00a0d\u2019alignement et d\u2019\u00e9talonnage\u00a0en permettant\u00a0\u00e0 des\u00a0groupes de convertisseurs de donn\u00e9es d\u2019\u00e9chantillonner leurs signaux\u00a0selon\u00a0un alignement pr\u00e9cis les uns par rapport aux autres.\u00a0Indispensable\u00a0au bon\u00a0fonctionnement\u00a0des\u00a0syst\u00e8mes multivoies\u00a0ultra-large\u00a0bande de nouvelle\u00a0g\u00e9n\u00e9ration, cette\u00a0condition\u00a0peut \u00eatre\u00a0remplie\u00a0en mettant en \u0153uvre\u00a0:<\/p>\n<ul>\n<li>une\u00a0synchronisation\u00a0r\u00e9f\u00e9rence-sortie\u00a0automatique<\/li>\n<li>des\u00a0retards r\u00e9f\u00e9rence-sortie extr\u00eamement bien appair\u00e9s\u00a0tout au long du process\u00a0(3\u2009ps\u00a0entre composants), la tension et la temp\u00e9rature (0,03\u2009ps\/\u00b0C)<\/li>\n<li>ajustement\u00a0du retard r\u00e9f\u00e9rence-sortie\u00a0inf\u00e9rieur \u00e0 la\u00a0picoseconde\u00a0(\u00b10,1\u2009ps), sans gigue<\/li>\n<\/ul>\n<p>Ces caract\u00e9ristiques\u00a0assurent\u00a0un alignement pr\u00e9cis\u00a0et\u00a0pr\u00e9visible\u00a0des signaux\u00a0SYSREF\u00a0et de\u00a0la synchronisation de plusieurs\u00a0puces. Les solutions JESD204B et JESD204C\u00a0de sous-classe\u20091\u00a0sont prises en charge en associant le synth\u00e9tiseur ADF4377 \u00e0 un circuit int\u00e9gr\u00e9\u00a0charg\u00e9 de\u00a0distribuer\u00a0les paires de signaux de r\u00e9f\u00e9rence et SYSREF. L\u2019ADF4377 int\u00e8gre\u00a0la totalit\u00e9 des\u00a0condensateurs de\u00a0d\u00e9couplage\u00a0n\u00e9cessaires\u00a0\u00e0 l\u2019alimentation, ce qui permet de\u00a0r\u00e9duire\u00a0l\u2019espace\u00a0occup\u00e9\u00a0sur les cartes\u00a0\u00e9lectroniques\u00a0compactes.<\/p>\n<p><a href=\"http:\/\/www.analog.com\/\">www.analog.com<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sous la r\u00e9f\u00e9rence ADF4377, Analog Devices, Inc,annonce un synth\u00e9tiseur fonctionnant dans la plage de fr\u00e9quence de sortie comprise entre 800\u2009MHz et 12,8 GHz et destin\u00e9 aux applications de synchronisation et de conversion de donn\u00e9es ultra-large bande de haute performance.<\/p>\n","protected":false},"author":36,"featured_media":387393,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[936],"domains":[47],"ppma_author":[1154],"class_list":["post-387392","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","tag-circuits-integres","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Synth\u00e9tiseur \u00e0 faible gigue pour applications de conversion d...<\/title>\n<meta name=\"description\" content=\"Sous la r\u00e9f\u00e9rence ADF4377, Analog Devices, Inc,annonce un synth\u00e9tiseur fonctionnant dans la plage de fr\u00e9quence de sortie comprise entre 800\u2009MHz et 12,8...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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