{"id":3412,"date":"2024-01-08T22:00:23","date_gmt":"2024-01-08T13:00:23","guid":{"rendered":"https:\/\/www.kyu.kr\/?p=3412"},"modified":"2024-01-08T22:17:26","modified_gmt":"2024-01-08T13:17:26","slug":"audio-research-ls-7-%ed%94%84%eb%a6%ac%ec%95%b0%ed%94%84-%ed%8f%ac%ea%b8%b0","status":"publish","type":"post","link":"https:\/\/www.kyu.kr\/?p=3412","title":{"rendered":"Audio Research LS-7 \ud504\ub9ac\uc570\ud504 \ud3ec\uae30…"},"content":{"rendered":"\n

\uc544\ub798\uc640 \uac19\uc740 \ud68c\ub85c\ub85c Audio Research\uc758 LS-7 \ud504\ub9ac\uc570\ud504 \uc81c\uc791\uc5d0 \ub3c4\uc804\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n

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\uc2dc\ubbac\ub808\uc774\uc158 \uc798 \ub418\uace0 \ud68c\ub85c\ub3c4 \uadf8\ub9ac \ubcf5\uc7a1\ud558\uc9c0 \uc54a\uc544\uc11c \uad1c\ucc2e\uc740 \uc120\ud0dd\uc774\ub77c\uace0 \ubd24\uace0 \uc544\ub798\uc640 \uac19\uc774 \ub0a9\ub55c\uc744 \ub9c8\ucce4\uc2b5\ub2c8\ub2e4. \ucc98\uc74c\uc5d0\ub294 \uc8fc\ubb38\ud55c 2N5484\uac00 \ub3c4\ucc29\ud558\uc9c0 \uc54a\uc544\uc11c LM317\uc744 \uc37c\uc2b5\ub2c8\ub2e4. <\/p>\n\n\n

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\"\"<\/figure>\n<\/div>\n\n\n

\uc774\uac78\ub85c \ub300\uac15 \uc18c\ub9ac\ub97c \ub4e4\uc5b4\ubcf4\uace0 JFET\uc774 \ub3c4\ucc29\ud574\uc11c \uc6d0\ub798 \ud68c\ub85c\ub3c4\ub300\ub85c \uafb8\uba70\ubd24\uc2b5\ub2c8\ub2e4. \uc18c\ub9ac\ub294 \uadf8\ub7f4 \ub4ef \ud588\ub294\ub370 \uc804\uc555\uc744 \ucc0d\uc5b4\ubcf4\ub2c8 \ub9ce\uc774 \uc774\uc0c1\ud588\uc2b5\ub2c8\ub2e4. U1 \uc9c4\uacf5\uad00\uc758 \ud50c\ub808\uc774\ud2b8 \uc804\uc555\uc774 80V \uc774\uc0c1 \uce21\uc815\uc774 \ub418\uace0 \ub098\uba38\uc9c0 \uc804\uc555\ub3c4 \uc81c\ub300\ub85c \ub418\ub294 \uac83\uc774 \uc5c6\uc5c8\uc2b5\ub2c8\ub2e4. \ud30c\ud615\ub3c4 \uc2ec\uac01\ud574\uc11c \uc544\ub798\uc640 \uac19\uc740 \uc2dd\uc774\uc5c8\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n

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\"\"<\/figure>\n<\/div>\n\n\n

\uc5b4\uc81c \uae30\ud0c0 \uc570\ud504 \uae00\uc744 \uc62c\ub838\ub294\ub370 \uac70\uae30\uc5d0\uc11c \ubcf8 \ub514\uc2a4\ud1a0\uc158\uc774 \uc794\ub729 \uac78\ub9b0 \ud30c\ud615\uac19\uc740 \ubaa8\uc2b5\uc774\uc5c8\uc2b5\ub2c8\ub2e4. LTspice \uc2dc\ubbac\ub808\uc774\uc158\uc774 \uc798 \ub3cc\uba74 \uc774\ub807\uac8c \ucc28\uc774\uac00 \ub098\uc9c0\ub294 \uc54a\ub294\ub370 \uc774\uc0c1\ud588\uc2b5\ub2c8\ub2e4. \uc774 \ud68c\ub85c\uac00 \ud53c\ub4dc\ubc31\uc774 \uc774\ub9ac\uc800\ub9ac \ub3cc\uace0 \uc788\ub294\ub370 \uadf8\uac8c \uc548\uc815\ud654\uac00 \uc548\ub418\ub294 \uac83\uc778\uc9c0… LTspice\uc5d0\uc11c UIC (use initial condition) \uc635\uc158\uc744 \uc8fc\uc5b4\uc11c \uc2dc\ubbac\ub808\uc774\uc158\uc744 \ub3cc\ub824\ubd24\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n

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\"\"<\/figure>\n<\/div>\n\n\n

first \ud30c\ud615\uc774 60V \uc815\ub3c4\uac00 \ub098\uc640\uc57c \ud558\ub294 \ucd08\ub2e8\uc758 \ud50c\ub808\uc774\ud2b8 \ud30c\ud615\uc778\ub370 \uce21\uc815\ud574\ubcf4\uba74 80V \uc774\uc0c1 \ub098\uc624\ub294 \uc0c1\ud0dc\uc785\ub2c8\ub2e4. \uc704\uc758 \ud30c\ud615\uc744 \ubcf4\uba74 \ucc98\uc74c \uba87 \ucd08 \ub3d9\uc548 80V \uc774\uc0c1\uc5d0 \uc788\ub2e4\uac00 \ud53c\ub4dc\ubc31\uc774 \ub3cc\uba74\uc11c(?) \uc5b4\ub518\uac00\ub85c \uc218\ub834\ud558\ub294 \ubaa8\uc591\uc744 \ubcfc \uc218 \uc788\ub294\ub370 40\ucd08\ub294 \ub118\uc5b4\uc57c flat\ud55c \ud30c\ud615\uc774 \uc5bb\uc5b4\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4. LS-7\uc758 \ub9e4\ub274\uc5bc\uc744 \ubcf4\ub2c8 \uc804\uc6d0\uc744 \ucf1c\uba74 \ud0c0\uc774\uba38\uac00 \uc791\ub3d9\uc744 \uc2dc\uc791\ud574\uc11c \ucd9c\ub825\uc744 mute \ud558\uace0 \uc788\ub2e4\uac00 45\ucd08 \ud6c4\uc5d0 \ucf1c\uc900\ub2e4\uace0 \ub418\uc5b4 \uc788\ub294\ub370 \ub300\uac15 \ub9de\ub294 \uac83 \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\ud558\uc9c0\ub9cc \uc81c\uac00 \ub0a9\ub55c\ud55c \ud68c\ub85c\ub294 \uacc4\uc18d \ucd08\uae30 1~3\ucd08 \uc0c1\ud0dc\uc5d0 \uba38\ubb3c\ub7ec \uc788\ub294 \ubb38\uc81c\uac00 \uc788\uace0 \uacb0\uad6d \ud574\uacb0\uc744 \ubabb\ud588\uc2b5\ub2c8\ub2e4 \u3161.\u3161 \uc544\ubb34\ub9ac \ubbf8\uc138 \uc870\uc815\uc744 \ud574\ub3c4 THD+N\uc774 3~5% \uc815\ub3c4 \uce21\uc815\uc774 \ub429\ub2c8\ub2e4. \ud504\ub9ac \uc570\ud504\ub85c\ub294 \ub099\uc81c\uc810\uc774\ub77c\uace0 \ud560 \uc218 \uc788\uaca0\uc8e0.<\/p>\n\n\n\n

\uce7c\uc744 \ube90\uc73c\uba74 \ubb34\ub77c\ub3c4 \uc798\ub77c\uc57c \ud558\ub294\ub370… \uacb0\uad6d CCS\ub97c \uc774\uc6a9\ud55c \uace0\uc815 \ubc14\uc774\uc5b4\uc2a4 \ucd08\ub2e8\uc740 \ud3ec\uae30\ud558\uace0 \uc140\ud504 \ubc14\uc774\uc5b4\uc2a4\ub85c \ud68c\ub85c\ub97c \ubc14\uafb8\uace0 \uc18c\ub9ac \ub4e4\uc5b4\ubcf4\uace0 \ub54c\ub824\uce58\uc6b0\uae30\ub85c \ud569\ub2c8\ub2e4.<\/p>\n\n\n

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\"\"<\/figure>\n<\/div>\n\n\n

U1\uc758 \ud50c\ub808\uc774\ud2b8 \uc800\ud56d\uacfc \uce90\uc18c\ub4dc \uc800\ud56d, U3\uc758 \uce90\uc18c\ub4dc \uc800\ud56d\uc744 \ubc14\uafd4\uc11c \uace0\uc815 \ubc14\uc774\uc5b4\uc2a4 \ud68c\ub85c\uc640 \ube44\uc2b7\ud558\uac8c 3mA, 1.5mA \uc5b8\uc800\ub9ac\ub85c \uc804\ub958\uac00 \ud750\ub974\uac8c \ud558\uace0 U2\uc758 \ubc14\uc774\uc5b4\uc2a4 \uc800\ud56d\uc744 6K\uc5d0\uc11c 3.3K\ub85c \ubc14\uafd4\uc11c \uc65c\uace1\uc744 \uc904\uc600\uc2b5\ub2c8\ub2e4. \uc65c\uace1\uc744 \ub354 \uc904\uc774\uae30 \uc704\ud574\uc11c NFB \uc800\ud56d\ub3c4 22K\ub85c \uc904\uc600\uc2b5\ub2c8\ub2e4. \uc0b0\uc218\ub97c \ud574\uc11c \ud55c \uac83\uc740 \uc544\ub2c8\uace0 LTspice\uc758 \ub3c4\uc6c0\uc73c\ub85c \ud588\uc2b5\ub2c8\ub2e4. \uc774\ub7ac\ub354\ub2c8 gain 2\ubc30, THD 0.12%\uc758 \uc774\ub3c4\uc800\ub3c4 \uc544\ub2cc \ud504\ub9ac \ud68c\ub85c\uac00 \ub098\uc654\ub294\ub370 \uc774\uac8c \ucc28\ub77c\ub9ac \ub354 \ub098\uc544 \ubcf4\uc600\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n

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\"\"<\/figure>\n<\/div>\n\n
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\"\"<\/figure>\n<\/div>\n\n\n

\ud558\uc9c0\ub9cc \uc2e4\uc81c \uce21\uc815\uc744 \ud574\ubcf4\ub2c8 3.6\ubc30 \uc99d\ud3ed\uc5d0 THD+N 0.7%\ub85c \uce21\uc815\uc774 \ub418\uc5c8\ub294\ub370\uc694, \uc774 \ud504\ub9ac\uc570\ud504\uac00 \ud29c\ub2dd\uc774 \uc5bc\ub9c8\ub098 \uc5b4\ub824\uc6b4\uc9c0 \ub2e4\uc2dc \ub290\uaf08\uc2b5\ub2c8\ub2e4. \uc544\ubb34\ud2bc \uce7c\uc744 \ube7c\uc11c \ubb34\ub294 \uc370\uc5c8\ub2e4\uace0 \uce58\uace0 \uc811\uc73c\ub824\uace0 \ud569\ub2c8\ub2e4.<\/p>\n\n\n

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\"\"<\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"

\uc544\ub798\uc640 \uac19\uc740 \ud68c\ub85c\ub85c Audio Research\uc758 LS-7 \ud504\ub9ac\uc570\ud504 \uc81c\uc791\uc5d0 \ub3c4\uc804\ud588\uc2b5\ub2c8\ub2e4. \uc2dc\ubbac\ub808\uc774\uc158 \uc798 \ub418\uace0 \ud68c\ub85c\ub3c4 \uadf8\ub9ac \ubcf5\uc7a1\ud558\uc9c0 \uc54a\uc544\uc11c \uad1c\ucc2e\uc740 \uc120\ud0dd\uc774\ub77c\uace0 \ubd24\uace0 \uc544\ub798\uc640 \uac19\uc774 \ub0a9\ub55c\uc744 \ub9c8\ucce4\uc2b5\ub2c8\ub2e4. \ucc98\uc74c\uc5d0\ub294 \uc8fc\ubb38\ud55c 2N5484\uac00 \ub3c4\ucc29\ud558\uc9c0 \uc54a\uc544\uc11c LM317\uc744 \uc37c\uc2b5\ub2c8\ub2e4. \uc774\uac78\ub85c \ub300\uac15 \uc18c\ub9ac\ub97c \ub4e4\uc5b4\ubcf4\uace0 JFET\uc774 \ub3c4\ucc29\ud574\uc11c \uc6d0\ub798 \ud68c\ub85c\ub3c4\ub300\ub85c \uafb8\uba70\ubd24\uc2b5\ub2c8\ub2e4. \uc18c\ub9ac\ub294 \uadf8\ub7f4 \ub4ef \ud588\ub294\ub370 \uc804\uc555\uc744 \ucc0d\uc5b4\ubcf4\ub2c8 \ub9ce\uc774 \uc774\uc0c1\ud588\uc2b5\ub2c8\ub2e4. U1 \uc9c4\uacf5\uad00\uc758 \ud50c\ub808\uc774\ud2b8 \uc804\uc555\uc774 80V \uc774\uc0c1 \uce21\uc815\uc774 \ub418\uace0 …
Audio Research LS-7 \ud504\ub9ac\uc570\ud504 \ud3ec\uae30…<\/span> \ub354\ubcf4\uae30<\/a><\/p>\n","protected":false},"author":1,"featured_media":3413,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[447,476],"class_list":["post-3412","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-108","tag-audio-research","tag-ls-7"],"_links":{"self":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/3412","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3412"}],"version-history":[{"count":2,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/3412\/revisions"}],"predecessor-version":[{"id":3425,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/3412\/revisions\/3425"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/media\/3413"}],"wp:attachment":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3412"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3412"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}