{"blog_title":"\u7d44\u8fbc\u307f\u958b\u767a\u306e\u30e1\u30e2\u3068\u304b","version":"1.0","author_name":"elec_make","provider_url":"https://hatena.blog","title":"dB","url":"https://elec-make.hateblo.jp/entry/2023/10/23/121451","description":"\u30aa\u30fc\u30e0\u306e\u6cd5\u5247 log dB\u30fb\u96fb\u529b\u306e\u5b9a\u7fa9\u30fb\u5358\u4f4d \u5bfe\u6570 \u6570\u5024 log2 0.301 log3 0.477 log7 0.845 dB \u96fb\u529b\u6bd4 \u96fb\u5727\u6bd4 -20 0.01 0.1 -6 0.25 0.5 0 1 1 3 2 1.41 6 4 2 10 10 3.16 20 100 10 dBm dBm=1mW\u30920dBm\u3068\u3057\u305f\u5358\u4f4d 600\u03a9\u7cfb\u306e\u5834\u5408 0dBm=0.775V \u305d\u306e\u4ed6 \u76f8\u5bfe\u30ec\u30d9\u30eb:Relative level \u57fa\u6e96\u70b9\u3092\u6c7a\u3081\u3001\u305d\u3053\u304b\u3089\u306e\u76f8\u5bfe\u30ec\u30d9\u30eb\u3092\u8868\u3059\u3002 \u3042\u308b\u5730\u70b9A\u3092+6dBr\u3068\u3057\u305f\u5834\u5408\u3001\u4e0b\u8a18\u306e\u30d6\u30e9\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u3067\u306f6 \u57fa\u6e96\u70b9 \u65b9\u5411 \u30d6\u30e9\u30c3\u30af\u30dc\u30c3\u30af\u30b9 \u65b9\u5411 \u5730\u70b9A 0dBr \u2192 +6dB \u2192 +\u2026","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Felec-make.hateblo.jp%2Fentry%2F2023%2F10%2F23%2F121451\" title=\"dB - \u7d44\u8fbc\u307f\u958b\u767a\u306e\u30e1\u30e2\u3068\u304b\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://elec-make.hateblo.jp/","width":"100%","author_url":"https://blog.hatena.ne.jp/elec_make/","image_url":null,"published":"2023-10-23 12:14:51","provider_name":"Hatena Blog","categories":["Common"],"type":"rich"}