{"id":370,"date":"2012-10-28T12:23:12","date_gmt":"2012-10-28T03:23:12","guid":{"rendered":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=370"},"modified":"2012-10-28T12:23:12","modified_gmt":"2012-10-28T03:23:12","slug":"1bit-delta-sigma-dac","status":"publish","type":"post","link":"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=370","title":{"rendered":"1bit delta sigma DAC"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" style=\"vertical-align: text-bottom;\" src=\"http:\/\/fpga.cool.coocan.jp\/electrart\/image201210\/dsd512.jpg\" alt=\"\" width=\"480\" height=\"322\" \/><\/p>\n<p>PCM2DSD\u5909\u63db\u57fa\u677f ( \u7565\u3057\u3066P2D\u57fa\u677f\u3068\u79f0\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3059) \u306e\u51fa\u529b\u3092\u3001<a href=\"http:\/\/fpga.cool.coocan.jp\/electrart\/FIRTST.pdf\">DSD\u539f\u7406\u57fa\u677f<\/a>\u306b\u5165\u308c\u3066\u518d\u751f\u3057\u3066\u307f\u307e\u3057\u305f( \u539f\u7406\u57fa\u677f\u306f\u4f5c\u308a\u76f4\u3057\u306e\u7b2c\uff12\u7248\u3067\u3059 )\u3002<\/p>\n<p>1kHz\/20kHz (\u5143\u306efs=44k1), 30kHz (\u5143\u306efs=88k2), \u305d\u3057\u306650kHz (\u540cfs=176k4) \u306e\u6b63\u5f26\u6ce2\u3092\u30aa\u30b7\u30ed\u3067\u898b\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"vertical-align: text-bottom;\" src=\"http:\/\/fpga.cool.coocan.jp\/electrart\/image201210\/1k.jpg\" alt=\"\" width=\"480\" height=\"360\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"vertical-align: text-bottom;\" src=\"http:\/\/fpga.cool.coocan.jp\/electrart\/image201210\/20k.jpg\" alt=\"\" width=\"480\" height=\"360\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"vertical-align: text-bottom;\" src=\"http:\/\/fpga.cool.coocan.jp\/electrart\/image201210\/30k.jpg\" alt=\"\" width=\"480\" height=\"360\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"vertical-align: text-bottom;\" src=\"http:\/\/fpga.cool.coocan.jp\/electrart\/image201210\/50k.jpg\" alt=\"\" width=\"480\" height=\"360\" \/><\/p>\n<p>\u57fa\u677f\u30c8\u30fc\u30bf\u30eb\u306eF\u7279\u306fSACD\u7528\u306eDAC\u3068\u540c\u3058\u3088\u3046\u306a\u611f\u3058\u306b\u3057\u3066\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30ce\u30a4\u30ba\u30b7\u30a7\u30fc\u30d1\u306e\u9ad8\u57df\u30ce\u30a4\u30ba\u306f\u307b\u3068\u3093\u3069\u554f\u984c\u306a\u3044\u30ec\u30d9\u30eb\u306b\u843d\u3061\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>(\u7279\u306b) 1kHz\u306e\u6ce2\u5f62\u304c\u6b6a\u3093\u3067\u898b\u3048\u308b\u5834\u5408\u306f\u304a\u305d\u3089\u304f\u753b\u50cf\u30b5\u30a4\u30ba\u304cWeb\u95b2\u89a7\u30a2\u30d7\u30ea\u3068\u306e\u95a2\u4fc2\u3067100%\u304b\u3089\u305a\u308c\u3066\u3044\u308b\u306f\u305a\u3067\u3059\u306e\u3067\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u3053\u306e\u57fa\u677f\u306f\u5358\u7d14\u306a\u30a2\u30ca\u30ed\u30b0FIR\u306b\u3088\u308bLPF + OP\u30a2\u30f3\u30d7\u306b\u3088\u308b\u30d5\u30a3\u30eb\u30bf (DSD1794A\u3092\u4f7f\u3046\u3068\u304d\u3068\u307b\u3068\u3093\u3069\u540c\u3058) \u3067\u69cb\u6210\u3055\u308c\u3066\u304a\u308a\u3001\u5165\u529b\u3055\u308c\u305f1bit DSD\u3092\u30de\u30eb\u30c1\u30d3\u30c3\u30c8\u306b\u518d\u91cf\u5b50\u5316\u3057\u3066D\/A\u5909\u63db\u3001\u3068\u3044\u3046 (\u8907\u96d1\u306a\uff1f) \u69cb\u6210\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u9ad8\u901f\u306eDSD\u4fe1\u53f7\u3092\u5165\u529b\u3057\u305f\u3068\u304d\u306b\u30c7\u30b8\u30bf\u30eb\u30c9\u30e1\u30a4\u30f3\u3067\u306e\u554f\u984c\u306f\u8d77\u304d\u306b\u304f\u3044\uff08\u3068\u3044\u3046\u304b\u8d77\u304d\u306a\u3044\uff09\u3068\u3044\u3048\u307e\u3059\u3002\u3084\u3063\u3066\u3044\u308b\u3053\u3068\u306f\u539f\u7406\u7684\u306bTI\u306eDSD1794A\u3068\u540c\u3058\u3068\u3044\u3048\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u539f\u7406\u57fa\u677f\u3067DAC\u3092\u4f5c\u308b\u3068\u3001DAC IC\u306e\u4ee3\u308f\u308a\u306b**74**574\u30924\u500b\u3067\u6e08\u3080\u306e\u3067\u5b89\u4e0a\u304c\u308a\u3067\u3042\u308b\u3068\u3044\u3046\u30e1\u30ea\u30c3\u30c8\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PCM2DSD\u5909\u63db\u57fa\u677f ( \u7565\u3057\u3066P2D\u57fa\u677f\u3068\u79f0\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3059) \u306e\u51fa\u529b\u3092\u3001DSD\u539f\u7406\u57fa\u677f\u306b\u5165\u308c\u3066\u518d\u751f\u3057\u3066\u307f\u307e\u3057\u305f( \u539f\u7406\u57fa\u677f\u306f\u4f5c\u308a\u76f4\u3057\u306e\u7b2c\uff12\u7248\u3067\u3059 )\u3002 1kHz\/20kHz (\u5143\u306efs=44k1), 30kHz ( &hellip; <a href=\"http:\/\/fpga.cool.coocan.jp\/wordpress\/?p=370\" class=\"more-link\"><span class=\"screen-reader-text\">&#8220;1bit delta sigma DAC&#8221; \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":[11],"tags":[],"class_list":["post-370","post","type-post","status-publish","format-standard","hentry","category-hardware-debug"],"_links":{"self":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/370","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=370"}],"version-history":[{"count":0,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/370\/revisions"}],"wp:attachment":[{"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=370"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fpga.cool.coocan.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}