{"id":5130,"date":"2020-04-13T18:33:00","date_gmt":"2020-04-13T10:33:00","guid":{"rendered":"http:\/\/www.liuwenhao.me\/?p=5130"},"modified":"2021-11-16T22:33:20","modified_gmt":"2021-11-16T14:33:20","slug":"audio%e6%a6%82%e8%bf%b0%e5%8f%8a%e5%b8%b8%e8%a7%81%e9%97%ae%e9%a2%98%ef%bc%88%e4%b8%8a%e5%8d%8a%e7%af%87%ef%bc%9a%e7%90%86%e8%ae%ba%e7%af%87%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.liuwenhao.me\/?p=5130","title":{"rendered":"Audio\u6982\u8ff0\u53ca\u5e38\u89c1\u95ee\u9898\uff08\u4e0a\u534a\u7bc7\uff1a\u7406\u8bba\u7bc7\uff09"},"content":{"rendered":"<p>\u8c28\u4ee5\u6b64\u6587\uff0c\u4f5c\u4e3a\u6211\u8fc7\u53bb\u51e0\u5e74\u5728\u97f3\u9891\u65b9\u9762\u7684\u6295\u5165\u7684\u4e00\u4e2a\u7eaa\u5ff5\u3002\u8fd9\u6b21Audio\u6982\u8ff0\u5c06\u5206\u4e3a\u4e24\u90e8\u5206\uff0c\u8fd9\u4e00\u7bc7\u504f\u91cd\u4e8e\u7406\u8bba\u65b9\u9762\uff0c\u4e0b\u4e00\u7bc7\u5c06\u4f1a\u504f\u91cd\u4e8e\u5b9e\u8df5\u4e0e\u5e94\u7528\u65b9\u9762\u3002<\/p>\n<p>\u672c\u6587\u7684\u4e3b\u8981\u5185\u5bb9\u6709\uff1a<\/p>\n<ul>\n<li>\u97f3\u9891\u6982\u8ff0\n<li>\u97f3\u9891\u7684\u5173\u952e\u53c2\u6570\n<li>\u97f3\u9891\u529f\u653e\n<ul>\n<li>\u7c7b\u578b\n<li>Class-AB\u4e0eClass-D\n<li>\u4e09\u79cd\u529f\u653e\u8f93\u51fa\uff08SE\/BTL\/PBTL\uff09\n<li>Class-D \u7535\u611f\u95ee\u9898 <\/li>\n<\/ul>\n<li>\u97f3\u9891ADC\/DAC\/Codec <\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">\u5bfc\u822a\u76ee\u5f55<\/p><ul class=\"toc_list\"><li><a href=\"#1\">1. \u97f3\u9891\u6982\u8ff0<\/a><\/li><li><a href=\"#2\">2. \u97f3\u9891\u7684\u5173\u952e\u53c2\u6570<\/a><ul><li><a href=\"#21_SNR\">2.1 \u4fe1\u566a\u6bd4\uff08SNR\uff09<\/a><\/li><li><a href=\"#22_DR_or_DNR\">2.2 \u52a8\u6001\u8303\u56f4\uff08DR or DNR\uff09<\/a><\/li><li><a href=\"#23_THDN\">2.3 \u603b\u8c10\u6ce2\u5931\u771f+\u566a\u97f3\uff08THD+N\uff09<\/a><\/li><li><a href=\"#24\">2.4 \u8f93\u51fa\u529f\u7387\u8ba1\u7b97<\/a><\/li><li><a href=\"#25_Datasheet\">2.5 \u770b\u61c2Datasheet\u56fe\u8868<\/a><\/li><\/ul><\/li><li><a href=\"#3\">3. \u97f3\u9891\u529f\u653e\u7c7b\u578b<\/a><ul><li><a href=\"#31\">3.1 \u97f3\u9891\u529f\u653e\u7c7b\u578b<\/a><\/li><li><a href=\"#32nbsp_Class-ABClass-D\">3.2&nbsp; Class-AB\u4e0eClass-D<\/a><\/li><li><a href=\"#33_SEBTLPBTL\">3.3 \u4e09\u79cd\u8f93\u51fa\u65b9\u5f0f\uff1aSE\/BTL\/PBTL<\/a><\/li><li><a href=\"#34_D\">3.4 D\u7c7b\u653e\u5927\u5668\u7535\u611f\u95ee\u9898<\/a><\/li><\/ul><\/li><li><a href=\"#4_ADCDACCodec\">4. \u97f3\u9891ADC\/DAC\/Codec<\/a><\/li><\/ul><\/div>\n<h1><span id=\"1\">1. \u97f3\u9891\u6982\u8ff0<\/span><\/h1>\n<ul>\n<li>\u97f3\u9891\u662f\u4e00\u79cd\u53ef\u4ee5\u542c\u5f97\u89c1\u7684\u4e1c\u897f\u3002\u5305\u62ec\u97f3\u4e50\uff0c\u566a\u58f0\uff0c\u8bf4\u8bdd\u58f0\u3002\n<li>\u97f3\u9891\u9891\u6bb5\u5b9a\u4e49\u8303\u56f4\u662f20Hz~20kHz\uff0c\u8fd9\u4e2a\u5b9a\u4e49\u662f\u8fd1\u4f3c\u7684\u4eba\u8033\u80fd\u591f\u542c\u89c1\u7684\u6700\u4f4e~\u6700\u9ad8\u9891\u7387\u3002\n<li>\u4e00\u4e2a\u666e\u901a\u7684\u4eba\u4e00\u822c\u542c\u89c9\u8303\u56f4\u4e3a50Hz~18kHz\u3002\n<li>\u97f3\u9891\u7cfb\u7edf\u5206\u4e3a\uff1a\n<ul>\n<li>Audio recording \/ \u97f3\u9891\u5f55\u97f3\uff1a\u5c06\u81ea\u7136\u754c\u7684\u58f0\u97f3\u4f7f\u7528ADC\u8f6c\u5316\u4e3a\u6570\u5b57\u4fe1\u53f7\uff0c\u5b58\u50a8\u5728\u4ecb\u8d28\u4e2d\u3002\n<li>Audio playback \/ \u97f3\u9891\u56de\u653e\uff1a\u5c06\u5b58\u50a8\u7684\u97f3\u9891\u7ecf\u8fc7\u89e3\u7801\uff0c\u653e\u5927\u540e\u9a71\u52a8\u5587\u53ed\u64ad\u653e\u51fa\u6765\u3002 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul>\n<li>\u97f3\u9891\u7684\u5b58\u5728\u6709\u4e09\u79cd\u5f62\u5f0f:\n<ul>\n<li>\u58f0\u5b66\u5f62\u5f0f\uff0c Acoustics\uff1a\u4f20\u64ad\u5728\u7a7a\u6c14\u6216\u8005\u5176\u4ed6\u4ecb\u8d28\u4e2d\uff0c\u76f4\u63a5\u88ab\u4eba\u8033\u542c\u5230\u3002\n<li>\u7535\u4fe1\u53f7\u5f62\u5f0f\uff0cElectronics\uff1a\u901a\u5e38\u662f\u7535\u538b\u4fe1\u53f7\uff0c\u53ef\u4ee5\u76f4\u63a5\u9a71\u52a8\u5587\u53ed\u6216\u8005\u88ab\u653e\u5927\u540e\u9a71\u52a8\u5587\u53ed\u3002\n<li>\u6570\u5b57\u5f62\u5f0f\uff0cDigitalized \uff1a\u88ab\u7f16\u7801\u540e\u7684\u97f3\u9891\u6587\u4ef6\u6216\u8005\u6570\u636e\uff0c\u5b58\u50a8\u5728\u4ecb\u8d28\u4e2d\u6216\u8005\u6b63\u5728\u7ebf\u8def\u4e2d\u4f20\u8f93\u3002 <\/li>\n<\/ul>\n<li>\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0cPWM\u4fe1\u53f7\u5c5e\u4e8e\u4ec0\u4e48\u5462\uff1f <\/li>\n<\/ul>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/11.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724711\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724711\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/11_thumb.jpg\" width=\"804\" height=\"380\"><\/a><\/p>\n<p align=\"center\">\u25b2\u58f0\u97f3\u5b58\u5728\u7684\u4e0d\u540c\u5f62\u5f0f<\/p>\n<p align=\"center\">&nbsp;<\/p>\n<h1><span id=\"2\">2. \u97f3\u9891\u7684\u5173\u952e\u53c2\u6570<\/span><\/h1>\n<p><p><strong>&nbsp;&nbsp;&nbsp; <\/strong>\u97f3\u9891\u7684\u5173\u952e\u53c2\u6570\u6709\u4fe1\u566a\u6bd4\u3001\u52a8\u6001\u8303\u56f4\u3001\u5931\u771f\u3001\u8f93\u51fa\u529f\u7387\u7b49\u3002<\/p>\n<h2><span id=\"21_SNR\"><strong>2.1 \u4fe1\u566a\u6bd4\uff08SNR\uff09<\/strong><\/span><\/h2>\n<ul>\n<li>\u4fe1\u566a\u6bd4\uff1a\u4fe1\u53f7\u548c\u566a\u58f0\u7684\u6bd4\u503c\u3002\u5355\u4f4d\u4e3adB\n<li>\u5b9e\u9645\u610f\u4e49\uff1a\u4e00\u4e2a\u97f3\u9891\u4fe1\u53f7\u7684\u5e95\u566a\u5927\u5c0f\u3002\n<li>\u6d4b\u8bd5\u65b9\u6cd5\n<ul>\n<li>\u7b2c\u4e00\u6b65\uff0c\u5c06\u88ab\u6d4b\u8bbe\u5907\u8c03\u6574\u5230\u6b63\u5e38\u8f93\u51fa\uff08\u901a\u5e38\u4e3a0dB\u8f93\u51fa\u6216\u8005\u6700\u5927\u4e0d\u5931\u771f\u8f93\u51fa\uff09\u83b7\u5f97\u4fe1\u53f7\u5e45\u5ea6\u3002\n<li>\u7b2c\u4e8c\u6b65\uff0c\u5173\u95ed\u4fe1\u53f7\u8f93\u5165\uff0c\u83b7\u5f97\u6b64\u65f6\u7684\u5ea6\u6570\uff0c\u5373\u4f4e\u566a\u5e45\u5ea6\u3002 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul>\n<li>\u4fe1\u53f7\u5e45\u5ea6\u548c\u4f4e\u566a\u5e45\u5ea6\u7684\u6bd4\u503c\u5373\u4e3a\u4fe1\u566a\u6bd4\uff08SNR\uff09\u3002 <\/li>\n<\/ul>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/12.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724712\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724712\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/12_thumb.jpg\" width=\"449\" height=\"70\"><\/a><\/p>\n<p>\u5e38\u89c1\u97f3\u9891\u7cfb\u7edf\u7684SNR\uff1a<\/p>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/13.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724713\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724713\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/13_thumb.jpg\" width=\"487\" height=\"300\"><\/a><\/p>\n<p>\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0c\u4eba\u8033\u5927\u6982\u80fd\u542c\u6e05\u591a\u5c11mV\u7684\u58f0\u97f3\u4fe1\u53f7\uff1f<\/p>\n<h2><span id=\"22_DR_or_DNR\"><strong>2.2 \u52a8\u6001\u8303\u56f4\uff08DR or DNR\uff09<\/strong><\/span><\/h2>\n<ul>\n<li>\u52a8\u6001\u8303\u56f4\uff1a\u8bbe\u5907\u80fd\u591f\u8f93\u51fa\u7684\u6700\u5927\u4fe1\u53f7\u5e45\u5ea6\u548c\u53ef\u5206\u8fa8\u7684\u6700\u5c0f\u4fe1\u53f7\u5e45\u5ea6\u7684\u6bd4\u503c\u3002\u5355\u4f4d\u4e3adB\u3002\n<li>\u5b9e\u9645\u610f\u4e49\uff1a\u53cd\u6620\u4e86\u4e00\u4e2a\u97f3\u9891\u7cfb\u7edf\u8f93\u51fa\u6700\u5927\u5e45\u5ea6\u7684\u540c\u65f6\uff0c\u5176\u6700\u5c0f\u8f93\u51fa\u4fe1\u53f7\u7684\u89e3\u6790\u5ea6\u3002\u6240\u4ee5\u53c8\u79f0\u4e3a\u52a8\u6001\u89e3\u6790\u5ea6\u3002\n<li>\u6d4b\u8bd5\u65b9\u6cd5\n<ul>\n<li>\u9996\u5148\u5c06\u88ab\u6d4b\u8bbe\u5907\u8f93\u51fa\u8c03\u6574\u5230\u6700\u5927\u4e0d\u5931\u771f\u5e45\u5ea6\u3002\n<li>\u7136\u540e\u5c06\u8f93\u5165\u4fe1\u53f7\u964d\u4f4e-60dB\uff0c\u91c7\u7528\u4e00\u4e2a\u6ee4\u6ce2\u5668\u5c06\u8f93\u51fa\u7684\u6d4b\u8bd5\u4fe1\u53f7\u9891\u7387\u5206\u91cf\u6ee4\u9664\uff0c\u83b7\u5f97\u5269\u4e0b\u7684\u566a\u58f0\u7535\u5e73\u5e45\u5ea6\u3002\n<li>\u8be5\u8bbe\u5907\u7684\u52a8\u6001\u8303\u56f4\u4e3a\u6700\u5927\u4e0d\u5931\u771f\u5e45\u5ea6\u4e0e\u8be5\u566a\u58f0\u7535\u5e73\u5e45\u5ea6\u7684\u6bd4\u503c\u3002 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0cSNR\u4e0eDNR\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/p>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/14.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724714\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724714\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/14_thumb.jpg\" width=\"804\" height=\"469\"><\/a><\/p>\n<p align=\"center\">\u25b2SNR\u4e0eDNR\u7684\u533a\u522b<\/p>\n<h2><span id=\"23_THDN\"><strong>2.3 \u603b\u8c10\u6ce2\u5931\u771f+\u566a\u97f3\uff08THD+N\uff09<\/strong><\/span><\/h2>\n<ul>\n<li>THD+N (\u603b\u8c10\u6ce2\u5931\u771f+\u566a\u97f3) \uff1a\u8c10\u6ce2\u548c\u566a\u97f3\u80fd\u91cf\u4e0e\u603b\u8f93\u51fa\u80fd\u91cf\u7684\u6bd4\u503c\n<li>\u5b9e\u9645\u610f\u4e49\uff1a\u7528\u6765\u8868\u793a\u4e00\u4e2a\u7cfb\u7edf\u7684\u975e\u7ebf\u6027\u7a0b\u5ea6\uff0c\u901a\u4fd7\u7684\u8bf4\u662f\u58f0\u97f3\u7684\u7eaf\u5ea6 <\/li>\n<\/ul>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/15.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724715\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724715\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/15_thumb.jpg\" width=\"405\" height=\"61\"><\/a><\/p>\n<p>THD+N\u6765\u6e90\uff1a<\/p>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/16.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724716\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724716\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/16_thumb.jpg\" width=\"804\" height=\"444\"><\/a><\/p>\n<p>\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0cTHD+N\u8ddfDNR\u662f\u72ec\u7acb\u7684\u53c2\u6570\u5417\uff1f<\/p>\n<h2><span id=\"24\"><strong>2.4 \u8f93\u51fa\u529f\u7387\u8ba1\u7b97<\/strong><\/span><\/h2>\n<ul>\n<li>\u8f93\u51fa\u529f\u7387\u9075\u5faa\u6b27\u59c6\u5b9a\u5f8b\uff1a <\/li>\n<\/ul>\n<p align=\"center\">P = Vrms2\/R<\/p>\n<ul>\n<li>\u5bf9\u6b63\u5f26\u6ce2\uff1a <\/li>\n<\/ul>\n<p align=\"center\">Prms = Vp2\/(2R)<\/p>\n<ul>\n<li>\u5355\u7aef\u4fe1\u53f7 <\/li>\n<\/ul>\n<p align=\"center\">Vp = Vcc\/2<\/p>\n<p align=\"left\">&nbsp;&nbsp;&nbsp; \u6240\u4ee5\u6211\u4eec\u6709\uff1a<\/p>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/49.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724749\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724749\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/49_thumb.jpg\" width=\"360\" height=\"128\"><\/a><\/p>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/17.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724717\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724717\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/17_thumb.jpg\" width=\"804\" height=\"307\"><\/a><\/p>\n<h2><span id=\"25_Datasheet\"><strong>2.5 \u770b\u61c2Datasheet\u56fe\u8868<\/strong><\/span><\/h2>\n<p>\u6458\u81eaPAM8302\uff1a<\/p>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/18.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724718\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724718\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/18_thumb.jpg\" width=\"804\" height=\"227\"><\/a><\/p>\n<p align=\"left\">&nbsp;&nbsp;&nbsp; \u8fd9\u4e48\u51e0\u4e2a\u95ee\u9898\u503c\u5f97\u8003\u8651\uff1a<\/p>\n<p align=\"left\">&nbsp;&nbsp;&nbsp; 1. \u4e3a\u4ec0\u4e48\u7b2c\u4e00\u4e2a\u56fe\u91cc\u9762\uff0c\u66f2\u7ebf\u4f1a\u7a81\u7136\u4e0a\u626c\uff1f\uff08\u524a\u6ce2\u65f6\u5931\u771f\u53d8\u5927\uff09<\/p>\n<p align=\"left\">&nbsp;&nbsp;&nbsp; 2. \u4e3a\u4ec0\u4e48\u57286-7k\u7684\u65f6\u5019\uff0cTHD+N\u662f\u6700\u9ad8\u7684\uff1f\uff08\u540e\u7ea7\u670920kHz\u7684\u4f4e\u901a\u6ee4\u6ce2\u5668\u6ee4\u6389\u4e86\u66f4\u9ad8\u9891\u7387\u7684\u8c10\u6ce2\uff09<\/p>\n<p align=\"left\">&nbsp;&nbsp;&nbsp; 3. \u4e3a\u4ec0\u4e48\u8f93\u51fa\u529f\u7387\u5728THD+N\u4e3a1%\u4e0e10%\u7684\u65f6\u5019\u53ef\u4ee5\u6d4b\u5230\u4e0d\u540c\u7684\u503c\uff1f\uff08\u5e45\u5ea6\u5927\uff0c\u524a\u6ce2\u5927\uff0c\u529f\u7387\u5219\u8d8a\u5927\uff09<\/p>\n<p align=\"left\">&nbsp;<\/p>\n<h1><span id=\"3\">3. \u97f3\u9891\u529f\u653e\u7c7b\u578b<\/span><\/h1>\n<p><h2><span id=\"31\"><strong>3.1 \u97f3\u9891\u529f\u653e\u7c7b\u578b<\/strong><\/span><\/h2>\n<p>\u97f3\u9891\u529f\u653e\u7684\u5206\u7c7b\uff1a<\/p>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/19.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724719\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724719\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/19_thumb.jpg\" width=\"705\" height=\"426\"><\/a><\/p>\n<ul>\n<li>\u51e0\u4e2a\u5bb9\u6613\u6df7\u6dc6\u7684\u6982\u5ff5\uff1a\n<ul>\n<li>\u6570\u5b57\u529f\u653e = Class D\u3001\u6a21\u62df\u529f\u653e\n<li>\u6570\u5b57\u8f93\u5165\u529f\u653e = I2S \u8f93\u5165\u7684\u529f\u653e\n<li>\u7532\u4e59\u7c7b\u653e\u5927\u5668 = Class AB\u653e\u5927\u5668\n<li>\u97f3\u54cd\u3001\u97f3\u7bb1\n<li>\u5f00\u73af\u529f\u653e\u3001\u95ed\u73af\u529f\u653e <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><span id=\"32nbsp_Class-ABClass-D\"><strong>3.2&nbsp; Class-AB\u4e0eClass-D<\/strong><\/span><\/h2>\n<ul>\n<li>D\u7c7b\u653e\u5927\u5668\u7684\u4f18\u52bf\uff1a\n<ul>\n<li>\u6e29\u5ea6\u4f4e\n<li>\u6240\u9700\u7535\u6d41\u5c0f\uff1a\u7eed\u822a\u65f6\u95f4\u957f\u3001\u7535\u6e90\u6613\u8bbe\u8ba1\u3001\n<li>\u76f8\u540c\u529f\u7387\u7684Class-AB\u9700\u8981\u66f4\u5927\u7684\u6563\u70ed\u7247\uff1a\u7a7a\u95f4\u5c0f\u3001\u6210\u672c\u4f4e <\/li>\n<\/ul>\n<li>D\u7c7b\u653e\u5927\u5668\u52a3\u52bf\uff1a\n<ul>\n<li>EMI\u95ee\u9898\uff0c\u989d\u5916\u7684EMC\u5668\u4ef6\u6d88\u8017\u6210\u672c\u4e0e\u7a7a\u95f4\n<li>\u5e72\u6270AM\/FM\u4ee5\u53ca\u5c04\u9891\n<li>\u8f93\u51fa\u9700\u8981\u989d\u5916\u7684\u7535\u611f\n<li>\u542c\u611f\u5dee\uff1f <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/20.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724720\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724720\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/20_thumb.jpg\" width=\"804\" height=\"293\"><\/a><\/p>\n<p>\u4e09\u79cd\u529f\u653e\u7c7b\u578b\uff1a\u6a21\u62df\u8f93\u5165\/\u6570\u5b57\u8f93\u5165\u5355\u82af\u7247\/\u6570\u5b57\u8f93\u5165\u5206\u7acb\u5f0f\u3002<\/p>\n<p align=\"center\">\n<p><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/21.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724721\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724721\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/21_thumb.jpg\" width=\"804\" height=\"532\"><\/a><\/p>\n<p><strong>\u6a21\u62df\u8f93\u5165\u529f\u653e<\/strong><\/p>\n<ul>\n<li>\u4f18\u70b9\uff1a\n<ul>\n<li>\u5e94\u7528\u7b80\u5355\n<li>\u65e0\u9700MCU\u63a7\u5236\n<li>\u6210\u672c\u4e00\u822c\u8f83\u4f4e <\/li>\n<\/ul>\n<li>\u7f3a\u70b9\uff1a\n<ul>\n<li>\u5bb9\u6613\u53d7\u5230\u566a\u97f3\u5e72\u6270\n<li>\u65e0\u4efb\u4f55\u97f3\u4e50\u5904\u7406\u80fd\u529b\n<li>\u542f\u52a8\u65f6\u5e8f\u8981\u6c42\u4e25\u683c\uff08POP\uff09 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/22.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724722\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724722\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/22_thumb.jpg\" width=\"804\" height=\"549\"><\/a><\/p>\n<p><strong>\u6570\u5b57\u8f93\u5165\u529f\u653e\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f18\u70b9\uff1a\n<ul>\n<li>\u5168\u6570\u5b57\n<li>\u65e0\u6a21\u62df\u566a\u58f0\n<li>\u5177\u6709VOL\/EQ\/DRC\u7b49\u5904\u7406\u529f\u80fd\n<li>\u4e0a\u7535\u65f6\u5e8f\u7075\u6d3b\n<li>POP\u58f0\u63a7\u5236\u7b80\u5355\u3002 <\/li>\n<\/ul>\n<li>\u7f3a\u70b9\uff1a\n<ul>\n<li>\u5fc5\u987b\u7528MCU\u63a7\u5236\n<li>\u8f93\u5165\u5fc5\u987b\u662fI2S\u6570\u5b57\u97f3\u9891\n<li>\u76f8\u5bf9\u4ef7\u683c\u7a0d\u9ad8 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/23.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724723\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724723\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/23_thumb.jpg\" width=\"804\" height=\"532\"><\/a><\/p>\n<p><strong>&nbsp;&nbsp;&nbsp; \u6570\u5b57\u8f93\u5165\u5206\u7acb\u5f0f:<\/strong><\/p>\n<ul>\n<li>\u4f18\u70b9\uff1a\n<ul>\n<li>\u591a\u58f0\u9053\n<li>\u7ec4\u5408\u7075\u6d3b\n<li>\u529f\u7387\u66f4\u5927 <\/li>\n<\/ul>\n<li>\u7f3a\u70b9\uff1a\n<ul>\n<li>\u663e\u800c\u6613\u89c1 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/24.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724724\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724724\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/24_thumb.jpg\" width=\"804\" height=\"340\"><\/a><\/p>\n<h2><span id=\"33_SEBTLPBTL\"><strong>3.3 \u4e09\u79cd\u8f93\u51fa\u65b9\u5f0f\uff1aSE\/BTL\/PBTL<\/strong><\/span><\/h2>\n<p><strong>&nbsp;&nbsp;&nbsp; SE<\/strong><\/p>\n<ul>\n<li>\u4f18\u70b9\uff1a\n<ul>\n<li>\u6210\u672c\u4f4e\n<li>LC\u6ee4\u6ce2\u5668\u6570\u91cf\u5c11\n<li>\u5355\u8def\u8f93\u51fa\u9700\u89811\u9897\u7535\u611f <\/li>\n<\/ul>\n<li>\u7f3a\u70b9\uff1a\n<ul>\n<li>\u9700\u8981\u9694\u76f4\u7535\u5bb9\n<li>\u4f4e\u9891\u54cd\u5e94\u5dee\n<li>\u8f93\u51fa\u529f\u7387\u5728\u540c\u7b49\u6761\u4ef6\u4e0b\u6bd4BTL\u5c0f4\u500d\n<li>\u7535\u6e90\u6291\u5236\u6bd4\u4f4e\n<li>\u5bb9\u6613\u53d7\u5230\u566a\u58f0\u5e72\u6270\uff08\u8f93\u5165\uff09 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/25.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724725\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724725\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/25_thumb.jpg\" width=\"804\" height=\"414\"><\/a><\/p>\n<p align=\"left\">\n<p align=\"left\">\u53c2\u8003\u7535\u8def\uff1a<\/p>\n<p align=\"left\">\n<p><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/26.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724726\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; float: none; padding-top: 0px; padding-left: 0px; margin-left: auto; display: block; padding-right: 0px; border-top-width: 0px; margin-right: auto\" border=\"0\" alt=\"\u56fe\u724726\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/26_thumb.jpg\" width=\"804\" height=\"429\"><\/a><\/p>\n<p><strong>BTL:<\/strong><\/p>\n<ul>\n<li>\u4f18\u70b9\uff1a\n<ul>\n<li>\u4f4e\u9891\u54cd\u5e94\u597d\n<li>\u65e0\u9700\u9694\u76f4\u7535\u5bb9\n<li>\u8f93\u51fa\u529f\u7387\u5728\u540c\u7b49\u6761\u4ef6\u4e0b\u662fSE\u7684\u56db\u500d\n<li>PSRR\u8f83\u597d\n<li>\u5dee\u5206\u8f93\u5165\u566a\u58f0\u514d\u75ab\u529b\u8f83\u597d <\/li>\n<\/ul>\n<li>\u7f3a\u70b9\uff1a\n<ul>\n<li>\u6210\u672c\u8f83\u9ad8\n<li>\u5355\u8def\u8f93\u51fa\u9700\u89812\u9897\u7535\u611f <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p align=\"center\">\n<p><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/27.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724727\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724727\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/27_thumb.jpg\" width=\"804\" height=\"677\"><\/a><\/p>\n<p>\u53c2\u8003\u7535\u8def\uff1a<\/p>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/28.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724728\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724728\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/28_thumb.jpg\" width=\"804\" height=\"476\"><\/a><\/p>\n<p><strong>&nbsp;&nbsp; PBTL\uff1a<\/strong><\/p>\n<p>PBTL \u5c06\u4e24\u4e2aBTL\u5e76\u8054\u4f7f\u7528\uff0c\u529f\u7387\u8ba1\u7b97\u516c\u5f0f\u4e0eBTL\u76f8\u540c\u3002\u4f46\u91cd\u70b9\u662f\u53ef\u4ee5double\u8f93\u51fa\u7535\u6d41\u3002\u5373\u53ef\u4ee5\u652f\u6301\u4f4e\u963b\u6297\u7684\u5587\u53ed\u6765\u6ee1\u8db3\u66f4\u5927\u529f\u7387\u8f93\u51fa\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u539fBTL\u6700\u4f4e\u652f\u63014ohm\u5587\u53ed\uff0c\u572812V\u4e0b\u6700\u5927\u529f\u7387\u4e3a18W\u3002 PBTL\u53ef\u4ee5\u75282ohm\u5587\u53ed\u8fbe\u523036W\u6700\u5927\u529f\u7387\u3002<\/p>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/29.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724729\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724729\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/29_thumb.jpg\" width=\"512\" height=\"642\"><\/a><\/p>\n<p>\u53c2\u8003\u7535\u8def\uff1a<\/p>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/30.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724730\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724730\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/30_thumb.jpg\" width=\"804\" height=\"449\"><\/a><\/p>\n<h2><span id=\"34_D\"><strong>3.4 D\u7c7b\u653e\u5927\u5668\u7535\u611f\u95ee\u9898<\/strong><\/span><\/h2>\n<ul>\n<li>D\u7c7b\u653e\u5927\u5668\u662f\u5426\u4e00\u5b9a\u9700\u8981\u7535\u611f\uff1f\n<li>\u7535\u611f\/\u78c1\u73e0\u7684\u4f5c\u7528\uff1a\n<ul>\n<li>\u8fc7EMC\n<li>\u97f3\u9891\u6d4b\u8bd5\u7684\u9700\u8981\n<li>\u51cf\u5c0f\u5587\u53ed\u53d1\u70ed\uff0c\u4fdd\u62a4\u5587\u53ed\n<li>\u6539\u5584\u542c\u611f\n<li>\u5c0f\u529f\u7387D\u7c7b\u653e\u5927\u5668\u4e0d\u9700\u8981\u7535\u611f\u6216LC\u6ee4\u6ce2\u5668\uff08&lt;3W)\n<li>\u7535\u6d41\u89c4\u683c\u9009\u53d6\u8981\u6ce8\u610f\n<li>L\u3001C\u9009\u53d6\u90fd\u8981\u6ce8\u610f\uff0c\u5e76\u4e0d\u662fLxC\u9009\u597d\u622a\u6b62\u9891\u7387\u5c31\u53ef\u4ee5\u3002 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/31.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724731\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724731\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/31_thumb.jpg\" width=\"804\" height=\"514\"><\/a><\/p>\n<p align=\"center\">&nbsp;<\/p>\n<h1><span id=\"4_ADCDACCodec\">4. \u97f3\u9891ADC\/DAC\/Codec<\/span><\/h1>\n<ul>\n<li>\u97f3\u9891Codec\uff0c\u987e\u540d\u601d\u4e49\uff1aCod-Dec\u3002Cod\u610f\u4e3aCoder\uff0cDec\u610f\u4e3aDecoder\u3002\u5373\uff1a\u540c\u65f6\u5305\u542b\u97f3\u9891ADC\u4e0e\u97f3\u9891DAC\n<li>\u5173\u952e\u53c2\u6570\uff1a\n<ul>\n<li>\u4f4d\u6570Resolution\n<li>\u5931\u771fTHD\n<li>\u4fe1\u566a\u6bd4SNR\n<li>I2S\u4fe1\u53f7 <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p align=\"center\"><a href=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/32.jpg\"><img loading=\"lazy\" title=\"\u56fe\u724732\" style=\"border-left-width: 0px; border-right-width: 0px; background-image: none; border-bottom-width: 0px; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-top-width: 0px\" border=\"0\" alt=\"\u56fe\u724732\" src=\"http:\/\/img.liuwenhao.ink\/img\/Audio_104E3\/32_thumb.jpg\" width=\"804\" height=\"415\"><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8c28\u4ee5\u6b64\u6587\uff0c\u4f5c\u4e3a\u6211\u8fc7\u53bb\u51e0\u5e74\u5728\u97f3\u9891\u65b9\u9762\u7684\u6295\u5165\u7684\u4e00\u4e2a\u7eaa\u5ff5\u3002\u8fd9\u6b21Audio\u6982\u8ff0\u5c06\u5206\u4e3a\u4e24\u90e8\u5206\uff0c\u8fd9\u4e00\u7bc7\u504f\u91cd\u4e8e\u7406\u8bba\u65b9\u9762\uff0c\u4e0b\u4e00\u7bc7\u5c06\u4f1a\u504f\u91cd\u4e8e\u5b9e\u8df5\u4e0e\u5e94\u7528\u65b9\u9762\u3002 \u672c\u6587\u7684\u4e3b\u8981\u5185\u5bb9\u6709\uff1a \u97f3\u9891\u6982\u8ff0 \u97f3\u9891\u7684\u5173\u952e\u53c2\u6570 \u97f3\u9891\u529f\u653e \u7c7b\u578b Class-AB\u4e0eClass-D \u4e09\u79cd\u529f\u653e\u8f93\u51fa\uff08SE\/BTL\/PBTL\uff09 Class-D \u7535\u611f\u95ee\u9898&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":-5130,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"views":2101,"_links":{"self":[{"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=\/wp\/v2\/posts\/5130"}],"collection":[{"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5130"}],"version-history":[{"count":4,"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=\/wp\/v2\/posts\/5130\/revisions"}],"predecessor-version":[{"id":5294,"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=\/wp\/v2\/posts\/5130\/revisions\/5294"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=\/"}],"wp:attachment":[{"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.liuwenhao.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}