{"id":1387,"date":"2025-10-11T01:42:29","date_gmt":"2025-10-11T01:42:29","guid":{"rendered":"https:\/\/www.wallisemi.com\/?p=1387"},"modified":"2025-10-13T01:43:32","modified_gmt":"2025-10-13T01:43:32","slug":"gnss%e3%82%a2%e3%83%97%e3%83%aa%e3%82%b1%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3%e7%94%a8%e9%ab%98%e6%80%a7%e8%83%bdrf%e3%83%81%e3%83%83%e3%83%97-%e5%88%86%e6%95%b0%e5%88%86%e5%91%a8%e5%99%a8%e3%81%ae","status":"publish","type":"post","link":"https:\/\/www.wallisemi.com\/ja\/blog\/industry-insights\/high-performance-rfchips-for-gnss-applications-design-and-implementation-of-fractional-dividers\/","title":{"rendered":"GNSS\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u7528\u9ad8\u6027\u80fdRF\u30c1\u30c3\u30d7\uff1a\u30d5\u30e9\u30af\u30b7\u30e7\u30ca\u30eb\u5206\u5468\u5668\u306e\u8a2d\u8a08\u3068\u5b9f\u88c5"},"content":{"rendered":"<p><strong>RF\u30c1\u30c3\u30d7<\/strong>&nbsp;\u306f\u3001\u885b\u661f\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3084\u79fb\u52d5\u4f53\u901a\u4fe1\u306a\u3069\u306e\u7121\u7dda\u30b7\u30b9\u30c6\u30e0\u306e\u4e2d\u6838\u3092\u306a\u3059\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3042\u308b\u3002\u305d\u306e\u6027\u80fd\u306f <strong>RF\u30c1\u30c3\u30d7<\/strong>&nbsp;\u306f\u3001\u901a\u4fe1\u30ea\u30f3\u30af\u5168\u4f53\u306e\u5b89\u5b9a\u6027\u3068\u7cbe\u5ea6\u306b\u76f4\u63a5\u5f71\u97ff\u3057\u307e\u3059\u3002GNSS\uff08\u5168\u5730\u7403\u822a\u6cd5\u885b\u661f\u30b7\u30b9\u30c6\u30e0\uff09\u3067\u306f <strong>RF\u30c1\u30c3\u30d7<\/strong>, \u5468\u6ce2\u6570\u5408\u6210\u306b\u304a\u3044\u3066\u5206\u6570\u5206\u5468\u56de\u8def\u306f\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u3001\u30b9\u30d7\u30ea\u30a2\u30b9\u4fe1\u53f7\u306e\u6291\u5236\u3084\u4fe1\u53f7\u54c1\u8cea\u306e\u5411\u4e0a\u306b\u5f79\u7acb\u3063\u3066\u3044\u308b\u3002\u672c\u7a3f\u3067\u306f\u3001\u6280\u8853\u8ad6\u6587\u306b\u57fa\u3065\u304d\u3001\u5206\u6570\u5206\u5468\u56de\u8def\u306e\u8a2d\u8a08\u624b\u6cd5\u3068\u6027\u80fd\u6700\u9069\u5316\u6226\u7565\u3092\u4f53\u7cfb\u7684\u306b\u7d39\u4ecb\u3059\u308b\u3002 <strong>RF\u30c1\u30c3\u30d7<\/strong>&nbsp;GNSS\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3051\u308b.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>1.RF\u30c1\u30c3\u30d7\u3068\u5206\u5468\u5668\u306e\u6280\u8853\u7684\u80cc\u666f<\/strong><strong><\/strong><\/h5>\n\n\n\n<p>GNSS\u53d7\u4fe1\u6a5f\u306b\u304a\u3044\u3066\u3001, <strong>RF\u30c1\u30c3\u30d7<\/strong>&nbsp;\u306f\u3001\u885b\u661f\u304b\u3089\u306e\u9ad8\u5468\u6ce2\u4fe1\u53f7\u3092\u53d7\u4fe1\u3057\u3001\u3055\u3089\u306b\u51e6\u7406\u3059\u308b\u305f\u3081\u306b\u4e2d\u9593\u5468\u6ce2\u6570\u306b\u30c0\u30a6\u30f3\u30b3\u30f3\u30d0\u30fc\u30c8\u3059\u308b\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u308b\u3002\u5c40\u90e8\u767a\u632f\u5668\u4fe1\u53f7\u306e\u751f\u6210\u306fPLL\uff08\u30d5\u30a7\u30fc\u30ba\u30fb\u30ed\u30c3\u30af\u30fb\u30eb\u30fc\u30d7\uff09\u5468\u6ce2\u6570\u30b7\u30f3\u30bb\u30b5\u30a4\u30b6\u30fc\u306b\u4f9d\u5b58\u3057\u3066\u304a\u308a\u3001\u5206\u6570\u5206\u5468\u5668\u304c\u67d4\u8edf\u306a\u5468\u6ce2\u6570\u69cb\u6210\u306e\u30b3\u30a2\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u3002\u5f93\u6765\u306e\u6574\u6570\u5206\u5468\u65b9\u5f0f\u3067\u306f\u3001\u591a\u5468\u6ce2\u304b\u3064\u9ad8\u7cbe\u5ea6\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30cb\u30fc\u30ba\u3092\u6e80\u305f\u3059\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u5206\u6570\u5206\u5468\u6280\u8853\u306f\u3001\u6700\u65b0\u6280\u8853\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u7126\u70b9\u3068\u306a\u3063\u3066\u3044\u308b\u3002 <strong>RF\u30c1\u30c3\u30d7<\/strong>&nbsp;\u3092\u30c7\u30b6\u30a4\u30f3\u3057\u305f\u3002.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>2.\u5206\u6570\u5206\u5468\u56de\u8def\u306e\u8a2d\u8a08\u3068\u5b9f\u88c5<\/strong><strong><\/strong><\/h5>\n\n\n\n<p>\u3053\u306e\u7814\u7a76\u3067\u306f\u3001GNSS\u7528\u306b\u8a2d\u8a08\u3055\u308c\u305f\u5206\u6570\u5206\u5468\u56de\u8def\u3092\u7d39\u4ecb\u3059\u308b\u3002 <strong>RF\u30c1\u30c3\u30d7<\/strong>, \u3053\u306e\u56de\u8def\u306f\u300116\uff5e255\u306e\u7bc4\u56f2\u3067\u4efb\u610f\u306e\u5206\u6570\u6bd4\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3002\u3053\u306e\u56de\u8def\u306fMASH1-1-1\u69cb\u9020\u306e\u30b7\u30b0\u30de\u30fb\u30c7\u30eb\u30bf\u5909\u8abf\u5668\u3092\u4f7f\u7528\u3057\u3001\u91cf\u5b50\u5316\u30ce\u30a4\u30ba\u3092\u9ad8\u5468\u6ce2\u306b\u62bc\u3057\u51fa\u3059\u30ce\u30a4\u30ba\u30fb\u30b7\u30a7\u30fc\u30d4\u30f3\u30b0\u6280\u8853\u3092\u63a1\u7528\u3057\u3066\u3044\u308b\u3002\u3053\u306e\u30ce\u30a4\u30ba\u306f\u30eb\u30fc\u30d7\u30fb\u30d5\u30a3\u30eb\u30bf\u30fc\u306b\u3088\u3063\u3066\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3055\u308c\u3001\u5206\u6570\u30b9\u30d7\u30ea\u30a2\u30b9\u4fe1\u53f7\u3092\u52b9\u679c\u7684\u306b\u6291\u5236\u3059\u308b\u3002.<\/p>\n\n\n\n<p>\u3055\u3089\u306b\u3001\u7279\u5b9a\u306e\u5076\u6570\u5024\uff08\u4f8b\u3048\u30700.25\u30010.5\uff09\u3092\u5165\u529b\u3059\u308b\u969b\u306e\u5909\u8abf\u5668\u306e\u5bc4\u751f\u554f\u984c\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u3001\u7814\u7a76\u30c1\u30fc\u30e0\u306f\u5909\u8abf\u5668\u306e\u524d\u306b\u5909\u5f62m\u7cfb\u5217\u306b\u57fa\u3065\u304f\u30b8\u30c3\u30bf\u30fc\u56de\u8def\u3092\u5c0e\u5165\u3057\u305f\u3002\u3053\u306e\u56de\u8def\u306f\u3001\u5e73\u5747\u5024\u304c\u30bc\u30ed\u306e\u64ec\u4f3c\u30e9\u30f3\u30c0\u30e0\u30fb\u30b7\u30fc\u30b1\u30f3\u30b9\u3092\u6ce8\u5165\u3057\u3001\u5909\u8abf\u5668\u51fa\u529b\u306e\u5468\u671f\u6027\u3092\u4e71\u3059\u3053\u3068\u3067\u3001\u56fa\u5b9a\u5468\u6ce2\u6570\u3067\u306e\u30b9\u30d7\u30ea\u30a2\u30b9\u4fe1\u53f7\u3092\u9664\u53bb\u3059\u308b\u3002.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>3.\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u691c\u8a3c\u3068\u6027\u80fd\u5206\u6790<\/strong><strong><\/strong><\/h5>\n\n\n\n<p>\u56de\u8def\u306e\u6027\u80fd\u3092\u691c\u8a3c\u3059\u308b\u305f\u3081\u3001\u7814\u7a76\u30c1\u30fc\u30e0\u306fADS\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u7528\u3044\u3066\u30e2\u30c7\u30ea\u30f3\u30b0\u3068\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3063\u305f\u3002\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u7d50\u679c\u3001\u5178\u578b\u7684\u306aGNSS\u5468\u6ce2\u6570\uff08\u4f8b\u3048\u3070\u3001GPS L1\u306e\u5468\u6ce2\u65701575.42 MHz\uff09\u3068\u7570\u306a\u308b\u5916\u90e8\u57fa\u6e96\u5468\u6ce2\u6570\uff0813 MHz\u300116.35 MHz\u300124.55 MHz\uff09\u3092\u5165\u529b\u3057\u305f\u5834\u5408\u3001\u5909\u8abf\u5668\u51fa\u529b\u30b9\u30da\u30af\u30c8\u30e9\u30e0\u306f\u76ee\u306b\u898b\u3048\u308b\u30b0\u30ea\u30c3\u30c1\u304c\u306a\u304f\u6ed1\u3089\u304b\u306b\u306a\u308b\u3053\u3068\u304c\u793a\u3055\u308c\u305f\u3002\u5e73\u5747\u5024\u306f\u5909\u5316\u305b\u305a\u3001\u3053\u306e\u56de\u8def\u304c\u30b9\u30d7\u30ea\u30a2\u30b9\u4fe1\u53f7\u3092\u9664\u53bb\u3059\u308b\u306e\u306b\u6709\u52b9\u3067\u3042\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3055\u308c\u305f\u3002.<\/p>\n\n\n\n<p>\u3055\u3089\u306b\u3001Verilog HDL\u3092\u4f7f\u7528\u3057\u3066Modelsim\u3067\u6a5f\u80fd\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3063\u305f\u3002\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u7d50\u679c\u3001\u5206\u5468\u5668\u306e\u51fa\u529b\u304c\u6b63\u78ba\u3067\u3042\u308b\u3053\u3068\u3001\u5e73\u5747\u5024\u304c\u76ee\u6a19\u306e\u5206\u5468\u6bd4\u306b\u4e00\u81f4\u3059\u308b\u3053\u3068\u304c\u5b9f\u8a3c\u3055\u308c\u3001\u56de\u8def\u306e\u6a5f\u80fd\u304c\u6b63\u3057\u3044\u3053\u3068\u304c\u78ba\u8a8d\u3055\u308c\u305f\u3002.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>4.RF\u30c1\u30c3\u30d7\u306e\u7dcf\u5408\u7684\u306a\u6027\u80fd\u5411\u4e0a<\/strong><strong><\/strong><\/h5>\n\n\n\n<p>\u3053\u306e\u5206\u6570\u5206\u5468\u56de\u8def\u306e\u8a2d\u8a08\u306e\u6210\u529f\u306f\u3001GNSS\u306e\u5468\u6ce2\u6570\u306e\u67d4\u8edf\u6027\u3068\u7cbe\u5ea6\u3092\u9ad8\u3081\u305f\u3060\u3051\u3067\u306a\u304f <strong>RF\u30c1\u30c3\u30d7<\/strong>&nbsp;\u307e\u305f\u3001\u51fa\u529b\u4fe1\u53f7\u306e\u30b9\u30da\u30af\u30c8\u30eb\u7d14\u5ea6\u3082\u5927\u5e45\u306b\u5411\u4e0a\u3057\u3066\u3044\u307e\u3059\u3002\u30b7\u30b0\u30de\u30fb\u30c7\u30eb\u30bf\u5909\u8abf\u5668\u69cb\u9020\u3092\u6700\u9069\u5316\u3057\u3001\u30a4\u30f3\u30c6\u30ea\u30b8\u30a7\u30f3\u30c8\u306a\u30b8\u30c3\u30bf\u30fc\u30fb\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u30b9\u30d7\u30ea\u30a2\u30b9\u4fe1\u53f7\u306e\u6291\u5236\u3068\u4f4d\u76f8\u30ce\u30a4\u30ba\u306e\u4f4e\u6e1b\u306b\u512a\u308c\u3001\u9ad8\u7cbe\u5ea6\u306e\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u3068\u6e2c\u4f4d\u3092\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u3067\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>5.\u7d50\u8ad6\u3068\u4eca\u5f8c\u306e\u5c55\u671b<\/strong><strong><\/strong><\/h5>\n\n\n\n<p>\u63d0\u6848\u3059\u308b\u5206\u6570\u5206\u5468\u56de\u8def\u306f\u3001\u9ad8\u96c6\u7a4d\u3068\u4f4e\u30b9\u30d7\u30ea\u30a2\u30b9\u7279\u6027\u3092\u517c\u306d\u5099\u3048\u3066\u304a\u308a\u3001\u7279\u306bGNSS\u306b\u9069\u3057\u3066\u3044\u308b\u3002 <strong>RF\u30c1\u30c3\u30d7<\/strong>&nbsp;\u9ad8\u5468\u6ce2\u7d14\u5ea6\u3092\u5fc5\u8981\u3068\u3059\u308b5G\u3001IoT\u3001BeiDou\uff08\u4e2d\u56fd\u306e\u885b\u661f\u822a\u6cd5\u30b7\u30b9\u30c6\u30e0\uff09\u306e\u6025\u901f\u306a\u767a\u5c55\u306b\u4f34\u3044\u3001, <strong>RF\u30c1\u30c3\u30d7<\/strong>&nbsp;\u306f\u3001\u30de\u30eb\u30c1\u30d0\u30f3\u30c9\u3001\u4f4e\u6d88\u8cbb\u96fb\u529b\u3001\u9ad8\u30ea\u30cb\u30a2\u30ea\u30c6\u30a3\u306e\u8a2d\u8a08\u3078\u3068\u9032\u5316\u3057\u3066\u3044\u308b\u3002\u5c06\u6765\u7684\u306b\u306f\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u88fd\u9020\u30d7\u30ed\u30bb\u30b9\u3068\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u6700\u9069\u5316\u304c\u7d71\u5408\u3055\u308c\u3001\u5206\u6570\u5206\u5272\u6280\u8853\u306f\u3001\u3088\u308a\u9ad8\u5468\u6ce2\u3067\u9ad8\u611f\u5ea6\u306e <strong>RF\u30c1\u30c3\u30d7<\/strong>, \u56fd\u5185\u3092\u52a9\u3051\u308b <strong>RF\u30c1\u30c3\u30d7<\/strong>&nbsp;\u4e16\u754c\u5e02\u5834\u306b\u304a\u3044\u3066\u3001\u3088\u308a\u91cd\u8981\u306a\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u7372\u5f97\u3059\u308b\u3002.<\/p>","protected":false},"excerpt":{"rendered":"<p>RFchips&nbsp;are core components in wireless systems such as satellite navigation and mobile communications. The performance of RFchips&nbsp;directly impacts the stability and accuracy of the entire communication link. In GNSS (Global Navigation Satellite System) RFchips, fractional divider circuits play a crucial role in frequency synthesis, helping to suppress spurious signals and improve signal quality. This article, based on a technical paper, systematically introduces the design methods and performance optimization strategies for fractional dividers aimed at RFchips&nbsp;in GNSS applications. 1. Technical Background of RFchips and Fractional Dividers In GNSS receivers, RFchips&nbsp;are responsible for receiving high-frequency signals from satellites and down-converting them to intermediate frequencies for further processing. The generation of local oscillator [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1358,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[30,31],"tags":[36],"class_list":["post-1387","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-insights","category-blog","tag-yvette-wu"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/posts\/1387","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/comments?post=1387"}],"version-history":[{"count":1,"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/posts\/1387\/revisions"}],"predecessor-version":[{"id":1388,"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/posts\/1387\/revisions\/1388"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/media\/1358"}],"wp:attachment":[{"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/media?parent=1387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/categories?post=1387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wallisemi.com\/ja\/wp-json\/wp\/v2\/tags?post=1387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}