{"id":234220,"date":"2015-09-15T22:00:00","date_gmt":"2015-09-15T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/attenuateur-de-gigue-dhorloge\/"},"modified":"2015-09-15T22:00:00","modified_gmt":"2015-09-15T22:00:00","slug":"attenuateur-de-gigue-dhorloge","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/attenuateur-de-gigue-dhorloge\/","title":{"rendered":"Att\u00e9nuateur de gigue d\u2019horloge"},"content":{"rendered":"<p>L&rsquo;interface JESD204B a &eacute;t&eacute; sp&eacute;cifiquement d&eacute;velopp&eacute;e pour r&eacute;pondre aux besoins des syst&egrave;mes &agrave; haut d&eacute;bit et cet att&eacute;nuateur de gigue d&rsquo;horloge &agrave; 3,2 GHz contient des fonctions qui prennent en charge et am&eacute;liorent les performances exceptionnelles de ce standard.<br \/>\nCe circuit affiche des valeurs de gigue de 50 fs (femtosecondes), ce qui am&eacute;liore le rapport signal\/bruit SNR et la dynamique des convertisseurs de donn&eacute;es &agrave; haut d&eacute;bit. Il dispose de 14 sorties configurables &agrave; faible bruit qui apportent une grande flexibilit&eacute; d&rsquo;interface avec un large &eacute;ventail de composants. Il embarque &eacute;galement un grand nombre de fonctions de gestion et de distribution d&rsquo;horloge, ce qui donne aux concepteurs de stations de base la possibilit&eacute; de concevoir un syst&egrave;me d&rsquo;horloge complet avec un seul composant.<br \/>\nDans les stations de base, un grand nombre de canaux de conversion s&eacute;rie conformes &agrave; la norme JESD204B exigent que leurs trames de donn&eacute;es soient align&eacute;es avec un FPGA. L&rsquo;att&eacute;nuateur simplifie la conception des syst&egrave;mes JESD204B en g&eacute;n&eacute;rant des horloges synchronis&eacute;es sur la source avec alignement ajustable des trames et &eacute;chantillons (SYSREF) dans un syst&egrave;me de conversion de donn&eacute;es. Le composant dispose de deux boucles PLL et d&rsquo;oscillateurs command&eacute;s en tension (VCO) int&eacute;gr&eacute;s. La premi&egrave;re boucle PLL verrouille un oscillateur d&rsquo;horloge local faible bruit command&eacute; en tension (VCXO) pour fournir une r&eacute;f&eacute;rence relativement bruyante, alors que la deuxi&egrave;me boucle PLL multiplie le signal du VCXO jusqu&rsquo;&agrave; la fr&eacute;quence du VCO en ajoutant un bruit exceptionnellement bas.\n<\/p>\n<hr \/>\n<p>En ce qui concerne la g&eacute;n&eacute;ration d&rsquo;horloge conforme JESD204B dans les infrastructures cellulaires, les infrastructures sans fil, la synchronisation des convertisseurs de donn&eacute;es, les cartes en bande de base hyperfr&eacute;quences et autres applications de communications &agrave; haut d&eacute;bit, l&rsquo;architecture de l&rsquo;att&eacute;nuateur de gigue d&rsquo;horloge affiche d&rsquo;excellentes performances en g&eacute;n&eacute;ration de fr&eacute;quence avec un faible bruit de phase et gigue int&eacute;gr&eacute;e. En outre, il occupe un faible espace sur la carte gr&acirc;ce &agrave; son bo&icirc;tier LFCSP 68 broches de seulement 10 x 10 mm.<\/p>\n<\/p>\n<p><a title=\"www.analog.com\/HMC7044\" target=\"_blank\" href=\"http:\/\/www.analog.com\/HMC7044\" rel=\"noopener\">www.analog.com\/HMC7044<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Conforme \u00e0 la norme d\u2019interface s\u00e9rie JESD204B, l\u2019att\u00e9nuateur de gigue d\u2019horloge hautes performances HMC7044 d\u2019Analog Devices est con\u00e7u pour connecter des convertisseurs de donn\u00e9es \u00e0 haut d\u00e9bit et des circuits logiques programmables (FPGA) int\u00e9gr\u00e9s dans des stations de base. <\/p>\n","protected":false},"author":22,"featured_media":234221,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[],"domains":[47],"ppma_author":[1149],"class_list":["post-234220","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Att\u00e9nuateur de gigue d\u2019horloge ...<\/title>\n<meta name=\"description\" content=\"Conforme \u00e0 la norme d\u2019interface s\u00e9rie JESD204B, l\u2019att\u00e9nuateur de gigue d\u2019horloge hautes performances HMC7044 d\u2019Analog Devices est con\u00e7u pour...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/234220\/\" \/>\n<meta property=\"og:locale\" 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