{"id":746,"date":"2014-05-31T18:11:50","date_gmt":"2014-05-31T09:11:50","guid":{"rendered":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=746"},"modified":"2014-05-31T18:45:53","modified_gmt":"2014-05-31T09:45:53","slug":"usbdac","status":"publish","type":"post","link":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=746","title":{"rendered":"USBDAC"},"content":{"rendered":"

\u696d\u8005\u3055\u3093\u306b\u5b9f\u88c5\u3057\u3066\u9802\u3044\u305f\u57fa\u677f\u304c\u5c4a\u304d\u307e\u3057\u305f\u3002<\/p>\n

\"\"\u00a0DAC IC \u306eI\/V \u56de\u8def\u3068LPF \u5468\u8fba\u306e\u56de\u8def\u90e8\u5206\u3092\u672a\u5b9f\u88c5\u3068\u3057\u3066\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u62b5\u6297\u306f2012\u30b5\u30a4\u30ba\u306e\u30c1\u30c3\u30d7\u90e8\u54c1\u3001\u30b3\u30f3\u30c7\u30f3\u30b5\u3084\u30aa\u30da\u30a2\u30f3\u30d7\u306f\u30b9\u30eb\u30fc\u30db\u30fc\u30eb\u30bf\u30a4\u30d7\u3092\u534a\u7530\u4ed8\u3051\u3059\u308b\u3088\u3046\u306b\u30d1\u30bf\u30fc\u30f3\u3092\u5f15\u304d\u307e\u3057\u305f\u3002<\/p>\n

FPGA\u3068DAC IC \u306e\u9593\u306b\u306f\u30c7\u30b8\u30bf\u30eb\u30fb\u30a2\u30a4\u30bd\u30ec\u30fc\u30bf\u3092\u5165\u308c\u3066Gnd\u304b\u3089\u5b8c\u5168\u306b\u7d76\u7e01\u3057\u3066\u304a\u308a\u307e\u3059\u3002<\/p>\n

PC, USB\u30de\u30a4\u30b3\u30f3, \u305d\u3057\u3066FPGA \u306e\u30c7\u30b8\u30bf\u30eb\u7cfb\u30ce\u30a4\u30ba\u3092\u30a2\u30ca\u30ed\u30b0\u56de\u8def\u306b\u6df7\u5165\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n

DAC IC \u306fTI \u306e PCM1792A<\/span><\/span> \u306b\u3057\u307e\u3057\u305f\u3002\u00a0\u5199\u771f\u306e\u3068\u304a\u308a\u30b7\u30f3\u30b0\u30eb\u4f7f\u3044\u3068\u3057\u3066\u3044\u307e\u3059\u3002DSD\u518d\u751f\u6642\u306b\u306f\u3053\u306e IC \u5185\u90e8\u306e\u30a2\u30ca\u30ed\u30b0 FIR \u30d5\u30a3\u30eb\u30bf\u3092\u4f7f\u3063\u3066\u9ad8\u5468\u6ce2\u30ce\u30a4\u30ba\u3092\u53d6\u308a\u9664\u3044\u3066\u30a2\u30ca\u30ed\u30b0\u30fb\u30aa\u30fc\u30c7\u30a3\u30aa\u4fe1\u53f7\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n

TI \u306f\u304b\u3064\u3066\u3001DSD1700<\/a> \u3068\u3044\u3046DSD\u5c02\u7528D\/A \u30b3\u30f3\u30d0\u30fc\u30bf IC \u3092\u958b\u767a\u3057\u3001SACD \u306e\u9ece\u660e\u671f\u306b\u4f7f\u308f\u308c\u3066\u3044\u305f\u3088\u3046\u306b\u805e\u3044\u3066\u3044\u307e\u3059\u304c\u3001DSD\u4fe1\u53f7\u3092\u30a2\u30ca\u30ed\u30b0\u306b\u623b\u3059\u305f\u3081\u306e\u624b\u6bb5\u3068\u3057\u3066\u3001DSD\u306e\u7406\u5ff5\u306b\u5fe0\u5b9f\u306a\u30a2\u30ca\u30ed\u30b0FIR\u30d5\u30a3\u30eb\u30bf\u3092\u7528\u3044\u305f\u6700\u521d\u306e\u30c7\u30d0\u30a4\u30b9\u3067\u3042\u308a\u3001\u6700\u8fd1\u306eTI \u306e DAC \u306b\u304a\u3051\u308bDSD \u30e2\u30fc\u30c9\u306f\u3053\u306e\u65b9\u5f0f\u3092\u8e0f\u8972\u3057\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n

\u305d\u306e\u8fba\u306e\u6280\u8853\u7684\u306a\u8a18\u8f09\u306f TI \u306e\u30b5\u30a4\u30c8\u304b\u3089 ”\u00a0jajt042.pdf ” \u3068\u5165\u529b\u3057\u3066\u691c\u7d22\u3059\u308c\u3070\u3001\u6cb3\u5408 \u4e00\u3055\u3093\u306e\u57f7\u7b46\u3055\u308c\u305f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u8aad\u3080\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002<\/p>\n

\u306a\u306b\u306f\u3068\u3082\u3042\u308c\u3001\u300cDSD\u306e\u7406\u5ff5\u306b\u5fe0\u5b9f\u306a D\/A \u5909\u63db\u3092\u884c\u3046\u300d\u3001\u3068\u3044\u3046\u3068\u3053\u308d\u3067\u3001( \u76f8\u5909\u308f\u3089\u305a ) TI \u306eDAC IC \u3092\u8d14\u5c53\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

PCM1792A \u306e \u30c7\u30b8\u30bf\u30eb\u30fb\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3001PCM \u3068 DSD \u306e\u5207\u308a\u66ff\u3048\u524d\u5f8c\u3067\u5404\u30d4\u30f3\u306e\u5f79\u5272\u304c\u5c11\u3057\u98a8\u5909\u308f\u308a\u306a\u306e\u3067\u3001\u4ed6\u306e DSD \u5bfe\u5fdc DAC IC \u3068\u306f\u4e92\u63db\u6027\u304c\u7121\u304f\u3001\u9014\u4e2d\u304b\u3089\u4fe1\u53f7\u3092\u53d6\u308a\u51fa\u3057\u3066\u3082\u4ed6\u793e\u306e DAC IC \u3068\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3055\u305b\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u305d\u308c\u3082\u3042\u3063\u3066\u3001DAC IC \u3078\u306e\u4fe1\u53f7\u3068\u306f\u5225\u306b\u3001\u4f8b\u306b\u3088\u3063\u3066HDMI \u30b3\u30cd\u30af\u30bf\u3092\u4f7f\u3063\u3066\u30b7\u30b9\u30c6\u30e0\u30af\u30ed\u30c3\u30af\u3092\u542b\u3081\u305f4\u7dda\u4fe1\u53f7\u3092LVDS\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u51fa\u529b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u3061\u3089\u306e\u65b9\u3082USB \u304b\u3089\u8ee2\u9001\u3055\u308c\u3066\u304f\u308b\u3068\u304a\u308a\u306e\u4fe1\u53f7\u3092\u51fa\u3059\u3053\u3068\u3082\u3001DSD\u306b\u5909\u63db (\u00a0\u5143\u304c DSD \u4fe1\u53f7\u306a\u3089\u30a2\u30c3\u30d7\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u00a0) \u3057\u305f\u4fe1\u53f7\u3092\u51fa\u3059\u3053\u3068\u3082\u9078\u629e\u7684\u306b\u53ef\u80fd\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u610f\u5473\u306f\u8584\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u7e4b\u304c\u308b\u30fb\u7e4b\u304c\u3089\u306a\u3044\u3001\u3068\u3044\u3046\u610f\u5473\u3067 P2D \u57fa\u677f\u3067\u53d7\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u5c11\u3057\u306e\u90e8\u54c1\u3092\u534a\u7530\u4ed8\u3051\u3057\u3001\u96fb\u6e90\u3092\u7528\u610f\u3059\u308c\u3070\u6bd4\u8f03\u7684\u7c21\u5358\u306b PCM2DSD \u5bfe\u5fdc\u306e USBDAC \u304c\u4f5c\u308c\u308b\u3068\u3044\u3046\u3068\u3053\u308d\u304c\u7279\u5fb4\u3067\u3059\u3002\u5199\u771f\u306e\u72b6\u614b\u306e\u57fa\u677f\u306bFS\u8868\u793a\u7528\u306eLED\u57fa\u677f\u3068\u30ef\u30a4\u30e4\u30fc\u30cf\u30fc\u30cd\u30b9\u3092\u4ed8\u3051\u30661\u679a\u3042\u305f\u308a2\u4e077\uff5e8\u5343\u5186\u304f\u3089\u3044\u3092\u8003\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n

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\u3082\u3057\u3082\u96fb\u6e90\u3068\u5225\u7b50\u4f53\u3067\u3053\u306e USBDAC \u3092\u904b\u7528\u3057\u305f\u3044\u3068\u304a\u8003\u3048\u306e\u65b9\u306b\u306f\u3001\u5c02\u7528\u30b1\u30fc\u30b9\u306b\u5165\u308c\u308b\u3068\u6e80\u8db3\u611f\u304c\u9ad8\u307e\u308b\u3068\u7533\u3057\u6dfb\u3048\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3059\u3002<\/p>\n

\u809d\u5fc3\u306e\u96fb\u6e90\u3092\u3069\u3046\u3059\u308b\u304b\u5fc3\u5f53\u305f\u308a\u306e\u7121\u3044\u65b9\u306fCQ\u51fa\u7248\u304b\u3089\u8ca9\u58f2\u3055\u308c\u3066\u3044\u308b\u5b9f\u9a13\u7528\u96fb\u6e90\u304c\u4fbf\u5229\u306b\u4f7f\u3048\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u696d\u8005\u3055\u3093\u306b\u5b9f\u88c5\u3057\u3066\u9802\u3044\u305f\u57fa\u677f\u304c\u5c4a\u304d\u307e\u3057\u305f\u3002 \u00a0DAC IC \u306eI\/V \u56de\u8def\u3068LPF \u5468\u8fba\u306e\u56de\u8def\u90e8\u5206\u3092\u672a\u5b9f\u88c5\u3068\u3057\u3066\u3042\u308a\u307e\u3059\u3002 \u62b5\u6297\u306f2012\u30b5\u30a4\u30ba\u306e\u30c1\u30c3\u30d7\u90e8\u54c1\u3001\u30b3\u30f3\u30c7\u30f3\u30b5\u3084\u30aa\u30da\u30a2\u30f3\u30d7\u306f\u30b9\u30eb\u30fc\u30db\u30fc\u30eb\u30bf\u30a4\u30d7\u3092\u534a\u7530\u4ed8\u3051\u3059\u308b\u3088\u3046\u306b … “USBDAC” \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-746","post","type-post","status-publish","format-standard","hentry","category-1"],"_links":{"self":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/746","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=746"}],"version-history":[{"count":13,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/746\/revisions"}],"predecessor-version":[{"id":760,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/746\/revisions\/760"}],"wp:attachment":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=746"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}