{"id":222267,"date":"2011-08-16T22:00:00","date_gmt":"2011-08-16T22:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/circuits-dvga-double-et-quadruple-grand-nombre-de-canaux-et-excellente-linearite\/"},"modified":"2011-08-16T22:00:00","modified_gmt":"2011-08-16T22:00:00","slug":"circuits-dvga-double-et-quadruple-grand-nombre-de-canaux-et-excellente-linearite","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/circuits-dvga-double-et-quadruple-grand-nombre-de-canaux-et-excellente-linearite\/","title":{"rendered":"Circuits DVGA double et quadruple, grand nombre de canaux et excellente lin\u00e9arit\u00e9"},"content":{"rendered":"

Les concepteurs de radio sont confrontés au défi de produire des filtres AAF (Anti-Aliasing Filters, ou filtres anti-aliasing) économiques et répondant aux exigences strictes des très larges bandes passantes des radios d’aujourd’hui. Pouvoir choisir parmi plusieurs niveaux d’impédance de filtre, y compris un niveau très faible comme 50 Ohms, non seulement simplifie la conception de ces filtres, mais améliore également les performances et facilite la fabrication. Les DVGA National sont optimisés pour pouvoir piloter un large éventail d’impédances de charge. Leur sortie à faible Z assure une fidélité exceptionnelle du signal, et fournit le gain de puissance supplémentaire, nécessaire au pilotage de filtres basse impédance.
\nLes LMH6522 et LMH6521 sont bien adaptés pour piloter des CAN rapides, comme le double convertisseur 16 bits à 160 Méch\/s ADC16DV160 de National. Le LMH6521 est même idéal pour piloter les CAN 12 bits à échantillonnage radio direct ADC12D500\/800RF de National. En ajoutant le synthétiseur de fréquence LMX2541, et l’un des suppresseurs de jigue d’horloge de la famille National LMK04800 ou LMK04000, un concepteur pourra réaliser un circuit complet.<\/p>\n

www.national.com\/pf\/LM\/LMH6522.html<\/a>
\nwww.national.com\/pf\/LM\/LMH6521.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

National Semiconductor a pr\u00e9sent\u00e9 deux DVGA (Digital Variable Gain Amplifier, ou amplificateur num\u00e9rique \u00e0 gain variable) \u00e0 deux et quatre canaux, permettant d’obtenir des syst\u00e8mes radio haut-d\u00e9bit tr\u00e8s performants. Le DVGA quadruple LMH6522 et le DVGA double LMH6521 fournissent une lin\u00e9arit\u00e9 exceptionnelle sur une large plage de fr\u00e9quence, ce qui en fait des candidats id\u00e9aux pour les syst\u00e8mes multicanaux sans-fil \u00e0 tr\u00e8s large bande les plus performants. Les applications cibles sont notamment les r\u00e9cepteurs FI (fr\u00e9quence interm\u00e9diaire) d’\u00e9chantillonnage, les circuits I\/Q DPD (Digital Pre-Distortion, ou pr\u00e9-distorsion num\u00e9rique), et les circuits radio \u00e0 tr\u00e8s large bande et conversion directe, utilis\u00e9s dans les stations de base GSM, TD-SCDMA, W-CDMA ou LTE multi-op\u00e9rateurs.<\/p>\n","protected":false},"author":22,"featured_media":222268,"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-222267","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"Circuits DVGA double et quadruple, grand nombre de canaux et ex...<\/title>\n<meta name=\"description\" content=\"National Semiconductor a pr\u00e9sent\u00e9 deux DVGA (Digital Variable Gain Amplifier, ou amplificateur num\u00e9rique \u00e0 gain variable) \u00e0 deux et quatre canaux,...\" \/>\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\/222267\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Circuits DVGA double et quadruple, grand nombre de canaux et excellente lin\u00e9arit\u00e9\" \/>\n<meta property=\"og:description\" content=\"National Semiconductor a pr\u00e9sent\u00e9 deux DVGA (Digital Variable Gain Amplifier, ou amplificateur num\u00e9rique \u00e0 gain variable) \u00e0 deux et quatre canaux, permettant d'obtenir des syst\u00e8mes radio haut-d\u00e9bit tr\u00e8s performants. Le DVGA quadruple LMH6522 et le DVGA double LMH6521 fournissent une lin\u00e9arit\u00e9 exceptionnelle sur une large plage de fr\u00e9quence, ce qui en fait des candidats id\u00e9aux pour les syst\u00e8mes multicanaux sans-fil \u00e0 tr\u00e8s large bande les plus performants. Les applications cibles sont notamment les r\u00e9cepteurs FI (fr\u00e9quence interm\u00e9diaire) d'\u00e9chantillonnage, les circuits I\/Q DPD (Digital Pre-Distortion, ou pr\u00e9-distorsion num\u00e9rique), et les circuits radio \u00e0 tr\u00e8s large bande et conversion directe, utilis\u00e9s dans les stations de base GSM, TD-SCDMA, W-CDMA ou LTE multi-op\u00e9rateurs.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/222267\/\" \/>\n<meta property=\"og:site_name\" content=\"EENewsEurope\" \/>\n<meta property=\"article:published_time\" content=\"2011-08-16T22:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ecinews.fr\/wp-content\/uploads\/import\/default\/files\/import\/eci2261_ns.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1680\" \/>\n\t<meta property=\"og:image:height\" content=\"1120\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"eeNews 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