{"id":2835,"date":"2025-05-15T14:19:49","date_gmt":"2025-05-15T06:19:49","guid":{"rendered":"https:\/\/ecmicrophones.com\/?p=2835"},"modified":"2026-01-28T10:17:59","modified_gmt":"2026-01-28T02:17:59","slug":"why-we-chose-a-high-end-mosfet-architecture-for-25mm-electret-microphones","status":"publish","type":"post","link":"https:\/\/ecmicrophones.com\/ja\/why-we-chose-a-high-end-mosfet-architecture-for-25mm-electret-microphones\/","title":{"rendered":"25mm\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306b\u30cf\u30a4\u30a8\u30f3\u30c9MOSFET\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u63a1\u7528\u3057\u305f\u7406\u7531"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"925\" height=\"540\" src=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/high-end-mosfet-architecture-25mm-electret-microphone.png\" alt=\"25mm\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30de\u30a4\u30af\u8a2d\u8a08\u306b\u304a\u3051\u308b\u30cf\u30a4\u30a8\u30f3\u30c9MOSFET\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\" class=\"wp-image-3720\" srcset=\"https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/high-end-mosfet-architecture-25mm-electret-microphone.png 925w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/high-end-mosfet-architecture-25mm-electret-microphone-300x175.png 300w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/high-end-mosfet-architecture-25mm-electret-microphone-768x448.png 768w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/high-end-mosfet-architecture-25mm-electret-microphone-18x12.png 18w, https:\/\/ecmicrophones.com\/wp-content\/uploads\/2025\/05\/high-end-mosfet-architecture-25mm-electret-microphone-600x350.png 600w\" sizes=\"auto, (max-width: 925px) 100vw, 925px\" \/><figcaption class=\"wp-element-caption\">\u5927\u53e3\u5f84\u30c0\u30a4\u30a2\u30d5\u30e9\u30e025mm\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30de\u30a4\u30af\u5411\u3051\u30cf\u30a4\u30a8\u30f3\u30c9MOSFET\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3<\/figcaption><\/figure>\n<\/div>\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30b3\u30f3\u30c7\u30f3\u30b5\u30de\u30a4\u30af\u30ed\u30db\u30f3\uff08ECM\uff09\u306b\u304a\u3044\u3066\u3001\u5185\u90e8\u306e\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u5909\u63db\u304a\u3088\u3073\u5897\u5e45\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306f\u3001\u30ce\u30a4\u30ba\u30d5\u30ed\u30a2\u3001\u76f4\u7dda\u6027\u3001\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30ec\u30f3\u30b8\u3001\u9577\u671f\u7684\u306a\u52d5\u4f5c\u5b89\u5b9a\u6027\u3092\u6c7a\u5b9a\u3059\u308b\u4e0a\u3067\u6975\u3081\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3059\u3002\u5229\u7528\u53ef\u80fd\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306e\u4e2d\u3067\u3082\u3001JFET\u3068MOSFET\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306f\u696d\u754c\u3067\u6700\u3082\u5e83\u304f\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u4e8c\u3064\u306e\u624b\u6cd5\u3067\u3042\u308b\u3002.<\/p>\n\n\n\n<p>JFET\u30d9\u30fc\u30b9\u306eECM\u306f\u3001\u305d\u306e\u7c21\u7d20\u3055\u3001\u5b89\u5b9a\u3057\u305f\u6027\u80fd\u3001\u88fd\u9020\u306e\u5bb9\u6613\u3055\u304b\u3089\u9577\u5e74\u597d\u307e\u308c\u3066\u304d\u305f\u3002\u6c4e\u7528\u30aa\u30fc\u30c7\u30a3\u30aa\u7528\u9014\u3084\u30b3\u30b9\u30c8\u91cd\u8996\u306e\u30aa\u30fc\u30c7\u30a3\u30aa\u7528\u9014\u306b\u304a\u3044\u3066\u3001\u4eca\u306a\u304a\u5b9f\u7e3e\u304c\u3042\u308a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u9078\u629e\u80a2\u3067\u3042\u308b\u3002.<\/p>\n\n\n\n<p>\u305f\u3060\u3057\u3001\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u30aa\u30fc\u30c7\u30a3\u30aa\u74b0\u5883\u3067\u52d5\u4f5c\u3059\u308b\u5927\u53e3\u5f84\u30c0\u30a4\u30a2\u30d5\u30e9\u30e0\u578b\u30de\u30a4\u30af\u30ed\u30db\u30f3\u7d20\u5b50\u306b\u304a\u3044\u3066\u306f\u3001\u76f4\u7dda\u6027\u3001\u30d8\u30c3\u30c9\u30eb\u30fc\u30e0\u3001\u6b6a\u307f\u306b\u95a2\u9023\u3059\u308b\u6027\u80fd\u4e0a\u306e\u5236\u9650\u304c\u3088\u308a\u9855\u8457\u306b\u306a\u308b\u3002\u3053\u3046\u3057\u305f\u30b1\u30fc\u30b9\u3067\u306f\u3001\u9069\u5207\u306b\u8a2d\u8a08\u3055\u308c\u305fMOSFET\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u304c\u3088\u308a\u9ad8\u3044\u6027\u80fd\u306e\u9650\u754c\u5024\u3092\u63d0\u4f9b\u3059\u308b\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ECM\u8a2d\u8a08\u306b\u304a\u3051\u308bJFET\u3068MOSFET<\/h2>\n\n\n\n<p>\u6280\u8853\u7684\u306a\u89b3\u70b9\u304b\u3089\u3001JFET\u3068MOSFET\u306e\u9078\u629e\u306f\u6b63\u8aa4\u306e\u554f\u984c\u3067\u306f\u306a\u304f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8981\u4ef6\u3068\u5b9f\u88c5\u80fd\u529b\u306e\u554f\u984c\u3067\u3042\u308b\u3002.<\/p>\n\n\n\n<p>JFET\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306f\u672c\u8cea\u7684\u306b\u5b89\u5b9a\u3057\u305f\u52d5\u4f5c\u3092\u63d0\u4f9b\u3057\u3001\u512a\u308c\u305f\u30ce\u30a4\u30ba\u7279\u6027\u3068\u3001\u53d6\u308a\u6271\u3044\u304a\u3088\u3073\u74b0\u5883\u5909\u52d5\u306b\u5bfe\u3059\u308b\u9ad8\u3044\u8010\u6027\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6a19\u6e96\u5316\u3055\u308c\u305f\u5927\u91cf\u751f\u7523\u578b\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u8a2d\u8a08\u306b\u6975\u3081\u3066\u9069\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p>\u5bfe\u7167\u7684\u306b\u3001MOSFET\u30d9\u30fc\u30b9\u306e\u8a2d\u8a08\u3067\u306f\u3001\u30d0\u30a4\u30a2\u30b9\u8a2d\u5b9a\u3001\u90e8\u54c1\u9078\u5b9a\u3001\u9759\u96fb\u6c17\u4fdd\u8b77\u306b\u5bfe\u3059\u308b\u3088\u308a\u53b3\u5bc6\u306a\u5236\u5fa1\u304c\u6c42\u3081\u3089\u308c\u308b\u3002\u3053\u308c\u3089\u306e\u8981\u7d20\u3092\u9069\u5207\u306b\u7ba1\u7406\u3059\u308c\u3070\u3001MOSFET\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306f\u4ee5\u4e0b\u306e\u3053\u3068\u3092\u53ef\u80fd\u306b\u3059\u308b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6975\u3081\u3066\u9ad8\u3044\u5165\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9<\/li>\n\n\n\n<li>\u9ad8\u97f3\u5727\u30ec\u30d9\u30eb\u4e0b\u3067\u306e\u512a\u308c\u305f\u76f4\u7dda\u6027<\/li>\n\n\n\n<li>\u4fe1\u53f7\u632f\u5e45\u304c\u4e0a\u6607\u3057\u305f\u969b\u306e\u6b6a\u307f\u306e\u4f4e\u6e1b<\/li>\n\n\n\n<li>\u52d5\u7684\u30d8\u30c3\u30c9\u30eb\u30fc\u30e0\u6700\u9069\u5316\u306b\u304a\u3051\u308b\u67d4\u8edf\u6027\u306e\u5411\u4e0a<\/li>\n<\/ul>\n\n\n\n<p>\u5927\u53e3\u5f84ECM\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u5229\u70b9\u304c\u76f4\u63a5\u7684\u306b\u97f3\u97ff\u6027\u80fd\u306e\u5411\u4e0a\u3068\u9577\u671f\u7684\u306a\u4fe1\u53f7\u306e\u4e00\u8cab\u6027\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30cf\u30a4\u30a8\u30f3\u30c9MOSFET\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3068\u6027\u80fd\u6700\u9069\u5316<\/h2>\n\n\n\n<p>\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u578b\u30de\u30a4\u30af\u30ed\u30db\u30f3\u306e\u8a2d\u8a08\u306b\u304a\u3051\u308b\u9577\u5e74\u306e\u7d4c\u9a13\u3001\u7279\u306bJFET\u30d9\u30fc\u30b9\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u95a2\u3059\u308b\u8c4a\u5bcc\u306a\u77e5\u898b\u3092\u57fa\u76e4\u3068\u3057\u3066\u3001\u30cf\u30a4\u30a8\u30f3\u30c9MOSFET\u5897\u5e45\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u4e2d\u6838\u3068\u3057\u305f25mm ECM\u3092\u958b\u767a\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u3001\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u30aa\u30fc\u30c7\u30a3\u30aa\u7528\u9014\u306b\u304a\u3044\u3066\u3001\u3088\u308a\u9ad8\u3044\u76f4\u7dda\u6027\u3001\u4f4e\u6b6a\u307f\u3001\u304a\u3088\u3073\u6027\u80fd\u5b89\u5b9a\u6027\u306e\u5411\u4e0a\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u610f\u56f3\u7684\u306a\u8a2d\u8a08\u5224\u65ad\u3067\u3057\u305f\u3002.<\/p>\n\n\n\n<p>\u3053\u306eMOSFET\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306f\u3001\u5358\u4e00\u306e\u30b9\u30c6\u30c3\u30d7\u306b\u3088\u308b\u5b9f\u88c5\u3067\u306f\u306a\u304f\u3001\u30d0\u30a4\u30a2\u30b9\u5236\u5fa1\u3001\u90e8\u54c1\u9078\u5b9a\u3001\u74b0\u5883\u8010\u6027\u306e\u53cd\u5fa9\u7684\u306a\u6700\u9069\u5316\u3092\u901a\u3058\u3066\u7d99\u7d9a\u7684\u306b\u6539\u826f\u3055\u308c\u3066\u304d\u307e\u3057\u305f\u3002\u305d\u306e\u7d50\u679c\u3001\u6210\u719f\u3057\u305f\u91cf\u7523\u5bfe\u5fdc\u8a2d\u8a08\u304c\u5b9f\u73fe\u3055\u308c\u3001\u9577\u671f\u7684\u306aOEM\u7d71\u5408\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p>\u3053\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u73fe\u5728\u306e\u5b9f\u73fe\u5f62\u614b\u306f\u00a0<strong>\u30e2\u30c7\u30eb ECM-B2583UML32-23861<\/strong>, \u5927\u53e3\u5f84\u30c0\u30a4\u30a2\u30d5\u30e9\u30e0\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u30de\u30a4\u30af\u30a8\u30ec\u30e1\u30f3\u30c8\u3067\u3001\u8981\u6c42\u306e\u53b3\u3057\u3044\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u7528\u9014\u5411\u3051\u306b\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">ECM-B2583UML32-23861\u306e\u4e3b\u306a\u7279\u5fb4<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>SNR\uff1a<\/strong>\u00a083 dB\uff08\u4ee3\u8868\u5024\uff09<\/li>\n\n\n\n<li><strong>\u6700\u5927\u97f3\u5727\u30ec\u30d9\u30eb:<\/strong>\u00a0120 dB<\/li>\n\n\n\n<li><strong>\u611f\u5ea6\uff1a<\/strong>\u00a0\u221232 \u00b12 dB<\/li>\n\n\n\n<li><strong>\u5168\u9ad8\u8abf\u6ce2\u6b6a\u307f\u7387\uff1a<\/strong>\u00a0\u22641%<\/li>\n\n\n\n<li><strong>\u52d5\u4f5c\u96fb\u5727\uff1a<\/strong>\u00a01.0 \uff5e 10.0 V<\/li>\n\n\n\n<li><strong>\u51fa\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\uff1a<\/strong>\u00a0\u22642 k\u03a9<\/li>\n\n\n\n<li><strong>\u30d4\u30c3\u30af\u30a2\u30c3\u30d7\u30d1\u30bf\u30fc\u30f3\uff1a<\/strong>\u00a0\u5358\u4e00\u6307\u5411\u6027\uff08\u5358\u4e00\u6307\u5411\u6027\uff09<\/li>\n\n\n\n<li><strong>\u4f4f\u5b85\uff1a<\/strong>\u00a0\u96fb\u78c1\u6ce2\u30b7\u30fc\u30eb\u30c9\u304a\u3088\u3073\u97f3\u97ff\u5b89\u5b9a\u6027\u752825mm\u9285-\u30cb\u30c3\u30b1\u30eb-\u4e9c\u925b\u5408\u91d1<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">25mm ECM\u306e\u4f7f\u7528\u4f8b<\/h2>\n\n\n\n<p>\u5927\u53e3\u5f84\u30c0\u30a4\u30a2\u30d5\u30e9\u30e0\u578b\u96fb\u5bb9\u30de\u30a4\u30af\u306f\u3001\u5c0f\u578b\u96fb\u5b50\u6a5f\u5668\u3084\u30e2\u30d0\u30a4\u30eb\u6a5f\u5668\u5411\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u4ee3\u308f\u308a\u306b\u3001\u97f3\u8cea\u3001\u4e00\u8cab\u6027\u3001\u8010\u4e45\u6027\u304c\u512a\u5148\u3055\u308c\u308b\u56fa\u5b9a\u8a2d\u7f6e\u578b\u304a\u3088\u3073\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u30aa\u30fc\u30c7\u30a3\u30aa\u30b7\u30b9\u30c6\u30e0\u5411\u3051\u306b\u6700\u9069\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f1a\u8b70\u304a\u3088\u3073\u8a0e\u8ad6\u30b7\u30b9\u30c6\u30e0<\/li>\n\n\n\n<li>\u653e\u9001\u7528\u304a\u3088\u3073\u30a4\u30f3\u30bf\u30d3\u30e5\u30fc\u7528\u30de\u30a4\u30af<\/li>\n\n\n\n<li>\u6f14\u58c7\u3068\u6f14\u58c7\u7528\u30de\u30a4\u30af<\/li>\n\n\n\n<li>\u696d\u52d9\u7528\u30aa\u30fc\u30c7\u30a3\u30aa\u30fb\u30ec\u30b3\u30fc\u30c0\u30fc<\/li>\n\n\n\n<li>\u540a\u308a\u4e0b\u3052\u578b\u307e\u305f\u306f\u30a2\u30ec\u30a4\u578b\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u30b7\u30b9\u30c6\u30e0<\/li>\n\n\n\n<li>\u7523\u696d\u7528\u901a\u4fe1\u7aef\u672b<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">JFET\u3068MOSFET\uff1a\u5b9f\u7528\u7684\u306a\u6280\u8853\u6bd4\u8f03<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u5fb4<\/th><th>JFET<\/th><th>\u30cf\u30a4\u30a8\u30f3\u30c9MOSFET<\/th><\/tr><\/thead><tbody><tr><td>\u5165\u529b\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9<\/td><td>\u9ad8\u3044<\/td><td>\u6975\u3081\u3066\u9ad8\u3044<\/td><\/tr><tr><td>\u76f4\u7dda\u6027<\/td><td>\u30b0\u30c3\u30c9<\/td><td>\u7d20\u6674\u3089\u3057\u3044<\/td><\/tr><tr><td>\u9ad8SPL\u4e0b\u3067\u306eTHD<\/td><td>\u4f4e\u3044<\/td><td>\u4e0b\u5074\uff08\u6700\u9069\u5316\u3055\u308c\u305f\u30d0\u30a4\u30a2\u30b9\u4ed8\u304d\uff09<\/td><\/tr><tr><td>\u9759\u96fb\u6c17\u5bfe\u7b56<\/td><td>\u81ea\u7136\u306b\u9811\u4e08<\/td><td>\u8a2d\u8a08\u7ba1\u7406\u578b\u4fdd\u8b77<\/td><\/tr><tr><td>\u8a2d\u8a08\u306e\u8907\u96d1\u3055<\/td><td>\u3088\u308a\u4f4e\u3044<\/td><td>\u3088\u308a\u9ad8\u3044<\/td><\/tr><tr><td>\u6027\u80fd\u4e0a\u9650<\/td><td>\u4e2d\u7a0b\u5ea6<\/td><td>\u3088\u308a\u9ad8\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u5236\u5fa1\u306b\u57fa\u3065\u304f\u6027\u80fd<\/h2>\n\n\n\n<p>MOSFET\u6280\u8853\u306f\u672c\u8cea\u7684\u306b\u4e0d\u5b89\u5b9a\u306a\u3082\u306e\u3067\u306f\u306a\u3044\u3002\u30d0\u30a4\u30a2\u30b9\u3001\u4fdd\u8b77\u56de\u8def\u3001\u74b0\u5883\u5909\u6570\u306b\u5bfe\u3059\u308b\u3088\u308a\u53b3\u5bc6\u306a\u5236\u5fa1\u304c\u5fc5\u8981\u3067\u3042\u308b\u3060\u3051\u3067\u3042\u308b\u3002\u9069\u5207\u306b\u8a2d\u8a08\u3055\u308c\u305fMOSFET\u30d9\u30fc\u30b9\u306eECM\u306f\u3001\u512a\u308c\u305f\u76f4\u7dda\u6027\u3001\u4f4e\u6b6a\u307f\u3001\u305d\u3057\u3066\u7279\u306b\u5927\u578b\u30c0\u30a4\u30a2\u30d5\u30e9\u30e0\u8a2d\u8a08\u306b\u304a\u3044\u3066\u3088\u308a\u5927\u304d\u306a\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30d8\u30c3\u30c9\u30eb\u30fc\u30e0\u3092\u63d0\u4f9b\u3059\u308b\u3002.<\/p>\n\n\n\n<p>\u5f53\u793e\u306e25mm MOSFET\u30d9\u30fc\u30b9\u306e\u30a8\u30ec\u30af\u30c8\u30ec\u30c3\u30c8\u30de\u30a4\u30af\u30ed\u30d5\u30a9\u30f3\u306f\u3053\u306e\u7406\u5ff5\u3092\u4f53\u73fe\u3057\u3066\u3044\u307e\u3059\uff1a\u5236\u5fa1\u3055\u308c\u305f\u30d7\u30ed\u30bb\u30b9\u3001\u691c\u8a3c\u6e08\u307f\u306e\u30c6\u30b9\u30c8\u3001\u305d\u3057\u3066\u5b9f\u74b0\u5883\u3067\u306e\u5c0e\u5165\u7d4c\u9a13\u3092\u901a\u3058\u3066\u9054\u6210\u3055\u308c\u305f\u6027\u80fd\u3067\u3059\u3002.<\/p>\n\n\n\n<p>\u5f53\u793e\u306e25mm\u30ab\u30fc\u30c7\u30a3\u30aa\u30a4\u30c9ECM\u306e\u8a73\u7d30\u306f\u3053\u3061\u3089\uff1a\u00a0<a href=\"https:\/\/ecmicrophones.com\/ja\/25mm-cardioid-electret-microphone-cartridge\/\" target=\"_blank\" rel=\"noreferrer noopener\">ECM-B2583UML32-23861 \u88fd\u54c1\u30da\u30fc\u30b8<\/a><\/p>\n\n\n\n<p><strong>\u304a\u554f\u3044\u5408\u308f\u305b<\/strong>&nbsp;\u30b5\u30f3\u30d7\u30eb\u306e\u3054\u8acb\u6c42\u3001\u6280\u8853\u8cc7\u6599\u306e\u3054\u63d0\u4f9b\u3001\u307e\u305f\u306fOEM\/ODM\u5354\u529b\u306b\u95a2\u3059\u308b\u3054\u76f8\u8ac7\u3002.<\/p>","protected":false},"excerpt":{"rendered":"<p>In electret condenser microphones (ECMs), the internal impedance-conversion and amplification architecture plays a critical role in determining noise floor, linearity, dynamic range, and long-term operational stability. Among the available solutions, JFET and MOSFET architectures are the two most widely adopted approaches in the industry. JFET-based ECMs have long been favored for their simplicity, stable performance, and ease of manufacturing. They remain a proven and reliable choice for many general-purpose and cost-sensitive audio applications. However, for large-diaphragm microphone elements operating in professional audio environments, performance limitations related to linearity, headroom, and distortion become more pronounced. In these cases, a properly engineered MOSFET architecture offers a higher performance ceiling. JFET and MOSFET [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3720,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[578,577,550],"class_list":["post-2835","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-insights","tag-esd-protection","tag-fet-type","tag-large-diaphragm"],"_links":{"self":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/2835","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/comments?post=2835"}],"version-history":[{"count":0,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/posts\/2835\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media\/3720"}],"wp:attachment":[{"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/media?parent=2835"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/categories?post=2835"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecmicrophones.com\/ja\/wp-json\/wp\/v2\/tags?post=2835"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}