{"id":3224,"date":"2012-12-22T23:29:20","date_gmt":"2012-12-22T15:29:20","guid":{"rendered":"http:\/\/blog.dword1511.info\/?p=3224"},"modified":"2012-12-24T09:46:40","modified_gmt":"2012-12-24T01:46:40","slug":"%e5%a5%bd%e9%9f%b3%e8%b4%a8%e7%9a%84-usb-dac","status":"publish","type":"post","link":"http:\/\/blog.dword1511.info\/?p=3224","title":{"rendered":"\u597d\u97f3\u8d28\u7684 USB DAC"},"content":{"rendered":"<p>\u4e0a\u6b21 @zeroomega \u4e70 USB DAC \u7684\u65f6\u5019\uff0c\u9274\u4e8e\u81ea\u5df1\u7684 Acer Aspire 4741 \u6781\u4e3a\u4e8c\u903c\u5730\u628a HDA Codec \u653e\u5230\u4e86\u65e0\u7ebf\u7f51\u5361\u8fb9\u4e0a\uff0c\u800c\u4e14 USB DAC \u4e5f\u4e0d\u8d35\uff0c\u56e0\u6b64\u5c31\u8ba9\u4ed6\u5e2e\u6211\u5e26\u4e86\u4e00\u53f0\u3002\u8fd9\u53f0\u94dd\u58f3\u7684\u5c0f\u73a9\u610f\u97f3\u8d28\u76f8\u5f53\u4e0d\u9519\uff0c\u56e0\u6b64\u6211\u7684 MP3 \u4e00\u7c7b\u7684\u4e1c\u897f\u5168\u90e8\u90fd\u5f85\u5728\u5c49\u5b50\u91cc\u5403\u7070\u53bb\u4e86\uff0c\u6211\u73b0\u5728\u4e3b\u8981\u7528\u8fd9\u73a9\u610f\u52a0\u4e0a clementine \u542c\u6b4c\uff08 clementine \u80fd\u76f4\u63a5\u8df3\u8fc7 PulseAudio \u548c Phonon \u5c06\u97f3\u9891\u8f93\u51fa\u81f3 ALSA \uff0c\u800c\u4e14\u53ef\u4ee5\u9009\u62e9\u76ee\u6807\u58f0\u5361\uff0c\u5f88\u65b9\u4fbf\uff09\u3002<\/p>\n<p><!--more--><\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100906.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3225\" alt=\"P1100906\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100906-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100906-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100906-1024x768.jpg 1024w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u5916\u89c2\uff0c\u5149\u6e9c\u6e9c\u7684\u94dd\u58f3\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100907.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3226\" alt=\"P1100907\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100907-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100907-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100907-1024x768.jpg 1024w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100907.jpg 2048w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u4e24\u8fb9\u90fd\u7531\u4e24\u4e2a\u87ba\u4e1d\u56fa\u5b9a\uff0c\u8fd9\u4e00\u9762\u662f USB Type B \u63d2\u5ea7\u548c\u4e00\u9897\u7d2b\u8272\u7684\u7535\u6e90\u6307\u793a\u706f LED \uff08\u7ecf\u6d4b\u8bd5\u4f3c\u4e4e\u4e0d\u662f\u7d2b\u5916\uff09\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100908.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3227\" alt=\"P1100908\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100908-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100908-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100908-1024x768.jpg 1024w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100908.jpg 2048w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u53e6\u4e00\u5934\u662f 3.5mm \u8033\u673a\u63a5\u53e3\u548c S\/PDIF \u6570\u5b57\u540c\u8f74\u8f93\u51fa\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100910.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3228\" alt=\"P1100910\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100910-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100910-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100910-1024x768.jpg 1024w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100910.jpg 2048w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u5f00\u58f3\uff0c\u677f\u5b50\u88ab\u5361\u5728\u94dd\u58f3\u7684\u69fd\u91cc\uff08\u8fd9\u79cd\u901a\u7528\u94dd\u58f3\u771f\u5fc3\u8fd8\u4e0d\u9519\u7684\uff09\uff0c\u6321\u677f\u4e0a\u9762\u8d34\u4e86\u4e24\u5757\u7edd\u7f18\u7684\u57ab\u5b50\u3002\u653e\u773c\u770b\u53bb\u677f\u5b50\u4e0a\u4e0d\u5c11\u72ec\u77f3\u7535\u5bb9\uff0c\u9000\u8026\u7535\u5bb9\u7528\u7684\u662f\u7ea2\u5b9d\u77f3\u7684 YXA \u7cfb\u5217\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100911.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3229\" alt=\"P1100911\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100911-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100911-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100911-1024x768.jpg 1024w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>PCB \u6b63\u9762\u3002\u677f\u5b50\u7684\u505a\u5de5\u7528\u6599\u548c\u8d70\u7ebf\u90fd\u5f88\u4e0d\u9519\uff0c\u8d34\u7247\u5143\u4ef6\u662f\u56de\u6d41\u710a\u63a5\u7684\uff0c\u770b\u4e0a\u53bb\u975e\u5e38\u8212\u670d\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100913.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3230\" alt=\"P1100913\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100913-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100913-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100913-1024x768.jpg 1024w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u80cc\u9762\uff0c\u76f4\u63d2\u5668\u4ef6\u710a\u5f97\u4e5f\u5f88\u89c4\u6574\u3002\u9664\u4e86 S\/PDIF \u63a5\u53e3\u90a3\u5757\u4ee5\u5916\u677f\u5b50\u4e0a\u6ca1\u6709\u6b8b\u7559\u52a9\u710a\u5242\uff0c\u5e94\u8be5\u662f\u88ab\u6d17\u8fc7\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100918.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3231\" alt=\"P1100918\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100918-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100918-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100918-1024x768.jpg 1024w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100918.jpg 1600w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u58f0\u5361\u7684\u6838\u5fc3\u662f\u5fb7\u5dde\u4eea\u5668\u5bb6 Burr-Brown \u7684 PCM2704 \uff0c\u4e5f\u5c31\u662f\u8bf4\u63a5\u53e3\u5b9e\u9645\u4e0a\u662f USB1.1 \u7684\u3002\u7528\u7684\u65f6\u5019\u53d1\u73b0\u6302\u5728\u5916\u7f6e Hub \u540e\u9762\u4f1a\u6709\u65f6\u4e0d\u65f6\u7684\u5361\u987f\uff0c\u5c3d\u7ba1 Hub \u662f MTT \u7684\u3002<\/p>\n<p>PCM2704 \u652f\u6301 5V \u6216\u8005 3.3V \u7684\u4f9b\u7535\uff0c48kHz \u7684\u91c7\u6837\u7387\uff0c16 \u4f4d\u7684 \u0394-\u03a3 DAC \uff0c\u53c2\u6570\u4e26\u4e0d\u7b97\u592a\u9ad8\uff0c\u53ea\u80fd\u8bf4\u662f\u5165\u95e8\u7ea7\u7684\u3002\u4e0d\u8fc7\u867d\u4e3a\u4fbf\u5b9c\u8d27\uff0c\u8fd8\u662f\u6bd4\u5927\u9646\u4ea7\/\u53f0\u4ea7\u7684\u82af\u7247\u597d\u4e0a\u4e0d\u5c11\u3002<\/p>\n<p>PCM2704 \u5185\u5efa\u4e86\u8033\u653e\uff0c\u5728 10k\u03a9 \u8d1f\u8f7d\u4e0b\u603b\u8c10\u6ce2\u5931\u771f\u4e3a 0.006% \uff0c32\u03a9 \u8d1f\u8f7d\u4e0b\u4e3a 0.025% \uff0c\u800c\u4e14 32\u03a9 \u8d1f\u8f7d\u4e0b\u53ef\u8f93\u51fa 12mW \u7684\u529f\u7387\uff0c\u5e26\u4e00\u822c\u7684\u8033\u673a\u591f\u4e86\u3002\u4fe1\u566a\u6bd4 98dB \uff0c\u52a8\u6001\u8303\u56f4 98dB \uff0c\u4e2d\u89c4\u4e2d\u77e9\u3002\u53e6\u5916\u8fd9\u73a9\u610f\u5b9e\u9645\u4e0a\u5e26\u4e86\u4e00\u4e2a USB HID \u7684 endpoint \uff0c\u53ef\u4ee5\u9644\u52a0\u6309\u952e\u548c LCD \u663e\u793a\u5c4f\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100919.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3232\" alt=\"P1100919\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100919-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100919-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100919-1024x768.jpg 1024w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100919.jpg 1600w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u632f\u8361\u7535\u8def\uff0c\u7531\u4e00\u53ea 12.000MHz \u7684\u77f3\u82f1\u6676\u4f53\u30011.00M\u03a9 \u7684\u7cbe\u5bc6\u91d1\u5c5e\u819c\u7535\u963b\u548c\u4e24\u4e2a\u72ec\u77f3\u8d1f\u8f7d\u7535\u5bb9\u7ec4\u6210\u3002\u6709\u4eba\u559c\u6b22\u6539 PCM2704 \u7684\u6676\u4f53\uff0c\u5176\u5b9e\u6ca1\u5fc5\u8981\uff0c\u8033\u6735\u80fd\u6709 USB PHY \u654f\u611f\uff1f<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100923.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3234\" alt=\"P1100923\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100923-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100923-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100923-1024x768.jpg 1024w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100923.jpg 1600w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u8f93\u5165\u5904\u7684\u4e00\u53ea\u8272\u7801\u78c1\u73e0\u8d1f\u8d23\u7535\u6e90\u7684\u6ee4\u6ce2\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100922.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3233\" alt=\"P1100922\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100922-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100922-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100922-1024x768.jpg 1024w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100922.jpg 1600w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u4e00\u53ea 3.3V \u7684 LDO \u8fdb\u4e00\u6b65\u4fdd\u8bc1\u4e86\u7535\u6e90\u7684\u7eaf\u51c0\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100924.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3235\" alt=\"P1100924\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100924-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100924-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100924-1024x768.jpg 1024w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100924.jpg 1600w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u6240\u6709\u7684\u9000\u8026\u5747\u7531\u4e00\u9897 16V 220\u03bcF \u7684\u7ea2\u5b9d\u77f3 YXA \u548c\u4e00\u9897 1.0\u03bcF \u7684\u72ec\u77f3\u7535\u5bb9\u5171\u540c\u5b8c\u6210\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100926.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3236\" alt=\"P1100926\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100926-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100926-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100926-1024x768.jpg 1024w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100926.jpg 2048w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>S\/PDIF \u8f93\u51fa\u90e8\u5206\u91c7\u7528\u4e86 1:1 \u7684\u53d8\u538b\u5668\u6765\u9694\u79bb\u3002\u867d\u7136\u6211\u57fa\u672c\u4e0d\u7528 S\/PDIF \uff0c\u4f46\u662f\u8fd9\u5904\u7ec6\u8282\u5374\u662f\u6211\u9009\u62e9\u8fd9\u4e2a\u73a9\u610f\u7684\u4e00\u4e2a\u4e3b\u8981\u56e0\u7d20\uff0c\u56e0\u4e3a\u5b83\u53cd\u6620\u4e86\u8bbe\u8ba1\u8005\u7684\u7ecf\u9a8c\u548c\u529f\u529b\uff0c\u6216\u8005\u8bf4\u662f\u5bf9\u7535\u8def\u7684\u7406\u89e3\u6df1\u6d45\u548c\u8003\u8651\u7684\u5468\u5168\u7a0b\u5ea6\u3002<\/p>\n<p>\u4e00\u822c\u6765\u8bb2\u4f60\u5f88\u96be\u4fdd\u8bc1\u76f8\u8fde\u7684\u4e24\u4e2a\u81ea\u5e26\u4f9b\u7535\u7684\u8bbe\u5907\u662f\u5171\u5730\u7684\u3002\u5982\u679c\u4e24\u8fb9\u7684\u8bbe\u5907\u6ca1\u6709\u53d8\u538b\u5668\u6765\u9694\u79bb\u4fe1\u53f7\u7ebf\u7684\u8bdd\uff0c\u90a3\u4e48\u4fe1\u53f7\u7ebf\u4e0a\u5c06\u6709\u53ef\u80fd\u4f1a\u6709\u5f88\u5f3a\u7684\u5171\u6a21\u7535\u6d41\u3002\u5e72\u6270\u4fe1\u53f7\u4e8b\u5c0f\uff0c\u5982\u679c\u4e24\u8005\u7684\u5730\u7684\u7535\u52bf\u5dee\u8fc7\u5927\uff0c\u90a3\u4e48\u70e7\u677f\u5b50\u5c31\u662f\u677f\u4e0a\u9489\u9489\u7684\u4e8b\u60c5\u4e86\uff0c\u6240\u4ee5\u8fd9\u4e2a\u8bbe\u8ba1\u8fd8\u662f\u5f88\u6709\u5fc5\u8981\u7684\u3002\u4ee5\u592a\u7f51\u5361\u4e0a\u5c31\u6709\u8fd9\u6837\u7684\u8bbe\u8ba1\uff0c\u4e0d\u8fc7\u6709\u7684\u65f6\u5019\u53d8\u538b\u5668\u4f1a\u88ab\u96c6\u6210\u5230\u63d2\u5ea7\u91cc\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100927.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3237\" alt=\"P1100927\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100927-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100927-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100927-1024x768.jpg 1024w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u9a71\u52a8\u53d8\u538b\u5668\u7684 74HC04 \u53cd\u76f8\u5668\u3002\u4e00\u5171 6 \u8def\uff0c\u6bcf\u8def 4mA \u5de6\u53f3\u7684\u7535\u6d41\uff0c\u770b\u8d70\u7ebf\u5927\u6982\u53ea\u7528\u4e86 1 \u5230 2 \u8def\uff0c\u5e76\u4e14\u548c\u53d8\u538b\u5668\u4e4b\u95f4\u8fd8\u6709\u4e00\u53ea 7.50\u03a9 \u7684\u7cbe\u5bc6\u7535\u963b\u548c 0.1\u03bcF \u7684\u72ec\u77f3\u7535\u5bb9\u3002\u5c31\u7b97\u53d8\u538b\u5668\u4e0d\u5e78\u9694\u79bb\u5931\u6548\uff0c74HC04 \u4e5f\u80fd\u5e2e PCM2704 \u6321\u4e00\u9635\u5b50\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100929.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3238\" alt=\"P1100929\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100929-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100929-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100929-1024x768.jpg 1024w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100929.jpg 2048w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>3.5mm \u8033\u673a\u63a5\u53e3\u662f\u4e4b\u524d\u6ca1\u89c1\u8fc7\u7684\u54c1\u79cd\uff08\u6055\u6211\u571f\u9cd6\uff09\uff0c\u8f93\u51fa\u8026\u5408\u7535\u5bb9\u662f\u7ea2\u5b9d\u77f3 ZLH \u4f4e\u963b\u6297\u7cfb\u5217 35V 220\u03bcF \u7684\u7535\u5bb9\uff0c\u677f\u5b50\u4e0a\u8fd8\u914d\u4e86\u8d34\u7247\u7535\u89e3\u7535\u5bb9\u7684\u811a\u4f4d\uff0c\u4e0d\u8fc7\u8fd9\u79cd\u4e1c\u897f\u7528\u70d9\u94c1\u4e0d\u597d\u710a\u3002<\/p>\n<p><a href=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100932.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-medium wp-image-3239\" alt=\"P1100932\" src=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100932-400x300.jpg\" width=\"400\" height=\"300\" srcset=\"http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100932-400x300.jpg 400w, http:\/\/blog.dword1511.info\/wp-uploads\/2012\/12\/P1100932-1024x768.jpg 1024w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u6362\u6389\u4e86\u4e00\u4e9b\u7535\u5bb9\uff0c\u8c01\u53eb\u624b\u5934\u4e0a\u6709\u4e00\u4e9b\u6e38\u624b\u597d\u95f2\u7684\u8d27\uff0c\u7edf\u7edf\u7ed9\u6211\u5e72\u6d3b\u53bb\u3002<\/p>\n<p>\u585e\u56de\u53bb\u4e4b\u524d\u53ef\u4ee5\u5148\u5728\u94dd\u58f3\u91cc\u57ab\u5f20\u7eb8\uff0c\u8fd9\u6837\u53ef\u4ee5\u52a0\u5f3a\u4e00\u4e0b PCB \u4e0a\u710a\u70b9\u548c\u5916\u58f3\u95f4\u7684\u7edd\u7f18\u3002<\/p>\n<p>\u6700\u540e\u8bf4\u4e0b\u4f7f\u7528\u7684\u611f\u53d7\u5427\u3002\u672c\u4eba\u8033\u6735\u6ca1\u90a3\u4e48\u7075\u654f\uff0c\u542c\u4e0d\u51fa\u300c\u6c34\u7535\u548c\u706b\u7535\u7684\u533a\u522b\u300d\uff0c\u4f46\u662f\u6211\u4ecd\u7136\u5206\u8fa8\u7684\u51fa\u6765\u8fd9\u662f\u6211\u6240\u6709\u97f3\u9891\u8bbe\u5907\u4e2d\u97f3\u8d28\u6700\u597d\u7684\uff0c\u4f4e\u97f3\u3001\u9ad8\u97f3\u90fd\u6ca1\u6709\u53ef\u5bdf\u89c9\u7684\u584c\u9677\uff0c\u4e5f\u6ca1\u6709\u522b\u626d\u6216\u8005\u6a21\u7cca\u7684\u611f\u89c9\u3002\u5173\u952e\u662f\u8fd9\u73a9\u610f<strong>\u51e0\u4e4e<\/strong>\u542c\u4e0d\u5230\u5e95\u566a\uff0c\u9664\u975e\u623f\u95f4\u975e\u5e38\u5b89\u9759\u3002\u4e00\u822c\u4f7f\u7528\u65f6\u97f3\u91cf\u8c03\u5230 10% \u5de6\u53f3\u5c31\u591f\u4e86\u3002\u6700\u540e\u5982\u524d\u6240\u8ff0\uff0c\u4e0d\u8981\u5c1d\u8bd5\u6302\u5728\u5916\u7f6e\u7684 USB Hub \u4e0a\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0a\u6b21 @zeroomega \u4e70 USB DAC \u7684\u65f6\u5019\uff0c\u9274\u4e8e\u81ea\u5df1\u7684 Acer Aspire 4741 \u6781\u4e3a\u4e8c\u903c &hellip; <a href=\"http:\/\/blog.dword1511.info\/?p=3224\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u597d\u97f3\u8d28\u7684 USB DAC<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[7],"tags":[],"_links":{"self":[{"href":"http:\/\/blog.dword1511.info\/index.php?rest_route=\/wp\/v2\/posts\/3224"}],"collection":[{"href":"http:\/\/blog.dword1511.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.dword1511.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.dword1511.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.dword1511.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3224"}],"version-history":[{"count":4,"href":"http:\/\/blog.dword1511.info\/index.php?rest_route=\/wp\/v2\/posts\/3224\/revisions"}],"predecessor-version":[{"id":3268,"href":"http:\/\/blog.dword1511.info\/index.php?rest_route=\/wp\/v2\/posts\/3224\/revisions\/3268"}],"wp:attachment":[{"href":"http:\/\/blog.dword1511.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.dword1511.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3224"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.dword1511.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}