{"id":168,"date":"2008-11-07T22:20:01","date_gmt":"2008-11-07T13:20:01","guid":{"rendered":"http:\/\/www.audiodesign.co.jp\/blog\/?p=168"},"modified":"2021-11-19T10:01:45","modified_gmt":"2021-11-19T01:01:45","slug":"non-nfbycyoyeaae-ieauiyoctho","status":"publish","type":"post","link":"https:\/\/audiodesign.co.jp\/blog\/?p=168","title":{"rendered":"NON-NFB\u30a2\u30f3\u30d7\u306b\u3064\u3044\u3066\u3000-\u305d\u306e\u767a\u60f3\u304c\u7406\u89e3\u3067\u304d\u307e\u305b\u3093-"},"content":{"rendered":"<p><span style=\"font-size: large\">\u7121\u5e30\u9084\u30a2\u30f3\u30d7\u306b\u5bfe\u3059\u308b\u30aa\u30fc\u30c7\u30a3\u30aa\u30c7\u30b6\u30a4\u30f3\u306e\u8003\u3048\u65b9<\/span><\/p>\n<p><strong>\uff1c\u306f\u3058\u3081\u306b\uff1e<\/strong><br \/>\n\u4eca\u56de\u306f\u3044\u308f\u3086\u308bNON-NFB\u30a2\u30f3\u30d7\uff08\u7121\u5e30\u9084\u30a2\u30f3\u30d7\uff09\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u898b\u307e\u3059\u3002<br \/>\n\u6642\u3005NON-NFB\u30a2\u30f3\u30d7\u3092\u4f5c\u308b\u4e88\u5b9a\u306f\u306a\u3044\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u3068\u3044\u3046\u554f\u3044\u5408\u308f\u305b\u3092\u3044\u305f\u3060\u304f\u306e\u3067\u3059\u304c\u3001\u3053\u306eNON-NFB\u30a2\u30f3\u30d7\u3068\u3044\u3046\u8003\u3048\u65b9\u304c\u79c1\u306b\u306f\u307e\u3063\u305f\u304f\u7406\u89e3\u3067\u304d\u306a\u3044\u306e\u3067\u3059\uff08\u771f\u7a7a\u7ba1\u30a2\u30f3\u30d7\u306f\u5225\u3068\u3057\u3066\uff09\u3002<\/p>\n<p><span style=\"font-weight: bold\">\uff1cNON\u2212NFB\u30a2\u30f3\u30d7\u306e\u6b6a\u7387\u7279\u6027\u306f\u3053\u3046\u306a\u308a\u307e\u3059\uff1e<\/span><br \/>\n\u305d\u306e\u7406\u7531\u3092\u8aac\u660e\u3059\u308b\u306b\u306f\u30c8\u30e9\u30f3\u30b8\u30b9\u30bf\u30a2\u30f3\u30d7\u306e\u56de\u8def\u3092\u898b\u3066\u3044\u305f\u3060\u304b\u306a\u304f\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<p><img decoding=\"async\" id=\"image166\" alt=\"tr-amp2.png\" src=\"http:\/\/www.audiodesign.co.jp\/blog\/wp-content\/uploads\/2008\/11\/tr-amp2.png\" \/><br \/>\n\u3053\u306e\u56f3\u306f\u6700\u3082\u7c21\u7565\u5316\u3057\u305f\u30c8\u30e9\u30f3\u30b8\u30b9\u30bf\u30a2\u30f3\u30d7\u306e\u56de\u8def\u3067\u3059\u3002\u5b9f\u969b\u306e\u30a2\u30f3\u30d7\u3067\u306f\u5fc5\u305a\uff08\u4e3b\u306b\u71b1\u306b\u3088\u308b\u30c9\u30ea\u30d5\u30c8\u3092\u6291\u5236\u3059\u308b\u305f\u3081\u306b\uff09\u5dee\u52d5\u30a2\u30f3\u30d7\u304b\u5bfe\u79f0\u578b\u30a2\u30f3\u30d7\uff08NPN\u3068PNP\u3092+-\u3067\u7d44\u307f\u5408\u308f\u305b\u305f\u56de\u8def\uff09\u3092\u7528\u3044\u307e\u3059\u304c\u3001\u4e0a\u56f3\u306e\u5358\u4f53\u30c8\u30e9\u30f3\u30b8\u30b9\u30bf\u56de\u8def\u3068\u52d5\u4f5c\u306f\u540c\u3058\u3067\u3059\u3002\u307e\u305f\u5b9f\u969b\u306b\u306f\u30d9\u30fc\u30b9\uff08B\u306e\u3068\u3053\u308d\uff09\u3084\u3001\u30a8\u30df\u30c3\u30bf\u306b\u3082\u4f4e\u3044\u62b5\u6297\u5024\u306e\u62b5\u6297\u304c\u5165\u3063\u3066\u3044\u305f\u308a\u3057\u307e\u3059\u304c\u3001\u3053\u3053\u3067\u306f\u7701\u7565\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Vin\u306b\u5165\u3063\u305f\u96fb\u5727\u304cVout\u3067\u5897\u5e45\u3055\u308c\u3066\u53d6\u308a\u51fa\u3055\u3055\u308c\u308b\u308f\u3051\u3067\u3059\u304c\u3001\u305d\u306e\u95a2\u4fc2\u306f<br \/>\nVout=Rc\u30fbIc<br \/>\n\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067Ic=Is\u30fb[exp(K\u30fbVin)-1]=Rc\u30fbIs\u30fb[exp(K)\u30fbexp(Vin)-1]\u3068\u3044\u3046\u95a2\u4fc2\u304c\u3042\u308b\u4e8b\u304c\u7406\u8ad6\u7684\u306b\u308f\u304b\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u3053\u3053\u3067K\u306f\u5b9a\u6570\uff08=q\/KT\u225240\uff09Is\u3082\u5b9a\u6570\u3067\u3059\u3002<br \/>\n\u3057\u305f\u304c\u3063\u3066\u3001<br \/>\nVout=Rc\u30fbIs\u30fb[exp(K\u30fbVin)-1]=Rc\u30fbIs\u30fb[exp(K)\u30fbexp(Vin)-1]<br \/>\nexp(Vin)-1\uff1e\uff1e\uff11\u306a\u306e\u3067\u3001<br \/>\nVout\u221dexp(Vin)<br \/>\n\u3068\u66f8\u3051\u307e\u3059\u3002<br \/>\nexp\u3068\u3044\u3046\u306e\u306f\u6307\u6570\u95a2\u6570\u3067\u3059\u3002<br \/>\n\uff08\u6587\u7cfb\u306e\u65b9\u306b\u306f\u3082\u3046\u3053\u3053\u3067\u3061\u3093\u3077\u3093\u304b\u3093\u3077\u3093\u304b\u3082&#8230;\uff09<br \/>\n\u3064\u307e\u308a\u51fa\u529b\u96fb\u5727\u306f\u5165\u529b\u96fb\u5727\u306eexp\uff08\u6307\u6570\u95a2\u6570\uff09\u3068\u3057\u3066\u8868\u3055\u308c\u308b\u306e\u3067\u3059\u3002\u6307\u6570\u95a2\u6570\u3068\u3044\u3046\u306e\u306f\uff58\u304c\u5897\u52a0\u3059\u308b\u3054\u3068\u306b\u4e00\u5b9a\u306e\u500d\u7387\u3067\u5927\u304d\u304f\u306a\u308b\u95a2\u6570\u3067\u3001\u8a00\u3044\u63db\u3048\u308b\u3068\uff58\u304c\u5927\u304d\u304f\u306a\u308b\u3068\u50be\u304d\u304c\u6bd4\u4f8b\u3057\u3066\u5927\u304d\u304f\u306a\u308b\u3068\u3082\u3044\u3048\u307e\u3059\u3002\u56f3\u3067\u793a\u3059\u3068\u3053\u3093\u306a\u611f\u3058\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" id=\"image167\" alt=\"exp-function.gif\" src=\"http:\/\/www.audiodesign.co.jp\/blog\/wp-content\/uploads\/2008\/11\/exp-function.gif\" \/><br \/>\n\u52e2\u3044\u306e\u3042\u308b\u66f2\u7dda\u3067\u3059\u304c\u3001\u3053\u308c\u304cNON-NFB\u30a2\u30f3\u30d7\u306e\u5165\u529b\u3068\u51fa\u529b\u306e\u95a2\u4fc2\u306b\u306a\u308b\u306e\u3067\u3001\u3053\u306e\u307e\u307e\u3067\u306f\u4f7f\u3044\u7269\u306b\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-<br \/>\n<span style=\"font-size: x-small\">\u3053\u3053\u3067\u3001\u4e00\u822c\u306b\u6307\u6570\u95a2\u6570exp(x)\u3092\u30c6\u30a4\u30e9\u30fc\u5c55\u958b\u3059\u308b\u3068<br \/>\nexp(x)=\uff11+x+(x\u30fbx)\/2+(x\u30fbx\u30fbx)\/6+(x\u30fbx\u30fbx\u30fbx)\/24+&#8230;<br \/>\n\u2252\uff11+x+0.5(x\u30fbx)+0.17(x\u30fbx\u30fbx)+0.042(x\u30fbx\u30fbx\u30fbx)+&#8230;<br \/>\n\u3068\u306a\u308a\u307e\u3059\u3002\uff08\u6570\u5b66\u7684\u306b\u305d\u3046\u306a\u308b\u306e\u3067\u3059\u3002\uff09<\/span><\/p>\n<p><span style=\"font-size: x-small\">\u4eca\u30b5\u30a4\u30f3\u6ce2\u306e\u5165\u529b\u304c\u3042\u3063\u305f\u3068\u3059\u308b\u3068\u3001<br \/>\nVin=sin\uff08\u03c9t\uff09<br \/>\n\u3067\u8868\u3055\u308c\u308b\u306e\u3067\u51fa\u529b\u96fb\u5727Vout\u306f<br \/>\nexp(x)-1=sin\uff08\u03c9t\uff09+sin\uff08\u03c9t\uff09\u30fbsin\uff08\u03c9t\uff09\/2+&#8230;&#8230;..<br \/>\n\u306b\u6bd4\u4f8b\u3059\u308b\u4e8b\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u52a0\u6cd5\u5b9a\u7406<br \/>\nsin\uff08\u03c9t\uff09\u30fbsin\uff08\u03c9t\uff09=0.5\uff081-cos<strong>2<\/strong>\u03c9t\uff09\u306a\u3069\u3092\u4f7f\u7528\u3057\u3066\u30013\u9805\u307e\u3067\u3092\u6574\u7406\u3059\u308b\u3068<br \/>\nexp(x)=0.25+1.126sin\uff08\u03c9t\uff09-0.25cos\uff08<strong>2<\/strong>\u03c9t\uff09-0.042sin\uff08<strong>3<\/strong>\u03c9t\uff09&#8230;&#8230;..<br \/>\n\u3068\u306a\u308a\u307e\u3059\u3002<br \/>\n<\/span> &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<\/p>\n<p>\u3055\u3089\u306b\u6307\u6570\u95a2\u6570\u306e\u6027\u8cea\u304b\u3089\u6b6a\u7387\u3092\u7b97\u51fa\u3057\u3066\u307f\u308b\u3068\uff08\u8a08\u7b97\u306e\u904e\u7a0b\u306f\u4e0a\u306e\u70b9\u7dda\u5185\u306e\u5c0f\u3055\u3044\u5b57\u3092\u3054\u89a7\u4e0b\u3055\u3044\uff09\u3001\u7b2c2\u9ad8\u8abf\u6ce2\u6210\u5206\u304c25%\u3001\u7b2c3\u9ad8\u8abf\u6ce2\u304c4%\u3001\u7b2c4\u9ad8\u8abf\u6ce2\u304c1%\u3060\u3051\u539f\u7406\u7684\u306b\u6df7\u3056\u308b\u3068\u3044\u3046\u7d50\u679c\u304c\u5c0e\u304d\u51fa\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u304c\u3044\u308f\u3086\u308bNON-NFB\u30a2\u30f3\u30d7\u306e\u5143\u3005\u306e\u6b6a\u7387\u7279\u6027\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u9014\u4e2d\u306e\u5c0f\u3055\u3044\u6587\u5b57\u3067\u66f8\u3044\u305f\u5f0f\u306f\u7406\u89e3\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3002\u305f\u3060\u3059\u3079\u3066\u306e\u30c8\u30e9\u30f3\u30b8\u30b9\u30bf\u30a2\u30f3\u30d7\u304c\u307b\u3093\u3068\u3046\u306b\u7121\u5e30\u9084\u3060\u3068\u3053\u308c\u3060\u3051\u306e\u6b6a\u3092\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u3044\u3046\u7d50\u8ad6\u3060\u3051\u899a\u3048\u3066\u7f6e\u3044\u3066\u4e0b\u3055\u3044\u3002<br \/>\n\u305f\u3060\u3057\u3001\u5b9f\u969b\u306e\u56de\u8def\u3067\u306f\u305f\u3068\u3048\u30a8\u30df\u30c3\u30bf\u306b\u62b5\u6297\u3092\u3064\u306a\u3044\u3067\u3044\u306a\u304f\u3066\u3082\u30c8\u30e9\u30f3\u30b8\u30b9\u30bf\u306e\u5185\u90e8\u62b5\u6297\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u3053\u3053\u307e\u3067\u6b6a\u7387\u306f\u60aa\u304f\u306f\u306a\u308a\u307e\u305b\u3093\uff08\u7279\u306b\u5c0f\u4fe1\u53f7\u6642\u306b\u306f\uff09\u3002<\/p>\n<p>\u30c8\u30e9\u30f3\u30b8\u30b9\u30bf\u306b\u306f\u3082\u3068\u3082\u3068\u3001\u5165\u529b\u96fb\u6d41\u306b\u6bd4\u4f8b\u3057\u305f\u30b3\u30ec\u30af\u30bf\u96fb\u6d41\u304c\u6d41\u308c\u308b\u3068\u3044\u3046\u6027\u8cea\uff08\u826f\u597d\u306a\u76f4\u7dda\u6027\uff09\u304c\u3042\u308a\u307e\u3059\u3002\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u5b9f\u969b\u306e\u56de\u8def\u3067\u306f\u306a\u305c\u3053\u3053\u307e\u3067\u6b6a\u7387\u60aa\u304f\u306a\u308b\u304b\u3068\u3044\u3046\u3068\u3001\u30d9\u30fc\u30b9\u306e\u5165\u529b\u62b5\u6297\u304c\u5165\u529b\u96fb\u6d41\u306e\u5897\u52a0\u3068\u3068\u3082\u306b\u6307\u6570\u95a2\u6570\u7684\u306b\u5c0f\u3055\u304f\u306a\u308b\u3068\u3044\u3046\u6027\u8cea\uff08\u975e\u76f4\u7dda\u6027\uff09\u304c\u3042\u308b\u306e\u3067\u3001\u5897\u5e45\u56de\u8def\u3068\u3057\u3066\u306f\u6b6a\u304c\u5927\u304d\u304f\u306a\u308b\u306e\u3067\u3059\u3002<br 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