{"id":3426,"date":"2024-01-10T16:40:44","date_gmt":"2024-01-10T07:40:44","guid":{"rendered":"https:\/\/www.kyu.kr\/?p=3426"},"modified":"2024-01-10T16:50:59","modified_gmt":"2024-01-10T07:50:59","slug":"%ec%b4%88%eb%8b%a8%ec%9a%a9-pentode","status":"publish","type":"post","link":"https:\/\/www.kyu.kr\/?p=3426","title":{"rendered":"(\uacf5\ubd80) \ucd08\ub2e8\uc6a9 Pentode"},"content":{"rendered":"\n

\uae30\ud0c0 \uc570\ud504\uc5d0\uc11c \ucd08\ub2e8\uc5d0 5\uadf9\uad00\uc744 \ubcf4\uae30\ub294 \uc27d\uc9c0 \uc54a\uc74c. 12AX7\uc774 \uc655\ub178\ub987\ud558\ub294 \ub3d9\ub124\ub77c\uc11c… \ucd08\uae30 VOX AC30 \uc885\ub958\uc5d0\uc11c\ub294 EF86\uc774 \uc720\uba85\ud588\ub294\ub370 \uc57d 200\ubc30 \uac8c\uc778\uc744 \uc790\ub791\ud588\uc9c0\ub9cc \ub9c8\uc774\ud06c\ub85c\ud3ec\ub2c9\uc5d0 \uadf9\ud788 \ucde8\uc57d\ud574\uc11c \ubb38\uc81c. \ub300\ucc45\ub3c4 \uc5c6\uc5c8\uae30 \ub54c\ubb38\uc5d0 \ub098\uc911\uc5d0\ub294 \ub2e4 12AX7\uc774 \ub300\uccb4\ud588\uc74c.<\/p>\n\n\n\n

\ud558\uc9c0\ub9cc 5\uadf9\uad00\uc740 3\uadf9\uad00\uacfc \ub2e4\ub978 \ud1a4\uc744 \ub0bc \uc218 \uc788\uc74c. \ud640\uc218\ucc28 \ubc30\uc74c\uc774 \uc880 \ub354 \ub9ce\uace0 ‘glassy” \uc0ac\uc6b4\ub4dc\uac00 \uc788\uc74c. \uc624\ubc84\ub4dc\ub77c\uc774\ube0c\ub97c \uac78\uba74 \ud3c9\uade0 \uc2a4\ud06c\ub9b0 \uc804\ub958\uac00 \ub298\uc5b4\ub098\uba74\uc11c \ucef4\ud504\ub808\uc158 \ud6a8\uacfc\uac00 \ub450\ub4dc\ub7ec\uc9c0\ub2c8\uae4c, \uc774\uac74 \ud30c\uc6cc \uc570\ud504\uc758 \ub514\uc2a4\ud1a0\uc158\uc744 \ub0ae\uc740 \ubcfc\ub968\uc73c\ub85c \uc2dc\ubbac\ub808\uc774\uc158 \ud558\uace0 \uc788\ub294 \uac83\ucc98\ub7fc \ubcf4\uc774\uae30\ub3c4 \ud568.<\/p>\n\n\n\n

\ub2e4\uc2dc \ub9d0\ud558\uba74 \ucd08\ub2e8\uc5d0 \uad73\uc774 5\uadf9\uad00\uc744 \uc4f4\ub2e4\uba74 \ud1a4 \ub54c\ubb38. \ud639\uc740 \ub4dc\ub77c\uc774\ube0c \ub2e8\uc73c\ub85c \uc62e\uaca8\uc11c 5\uadf9\uad00\uc744 \uc4f0\uba74 \uc624\ubc84\ub4dc\ub77c\uc774\ub4dc\uac00 \ub354 \uc88b\uc744 \uac83\uc774\uace0 \ub9c8\uc774\ud06c\ub85c\ud3ec\ub2c9 \uac71\uc815\ub3c4 \uc870\uae08 \ub35c\uac8c \ub428.<\/p>\n\n\n

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

\ub178\uc774\uc988<\/strong><\/p>\n\n\n\n

\ud56d\uc0c1 \ub098\uc624\ub294 \uc774\uc57c\uae30\uac00 3\uadf9\uad00\ubcf4\ub2e4 5\uadf9\uad00\uc774 \ub178\uc774\uc988\uac00 (hiss) \ub354 \ub9ce\ub2e4\ub294 \uac83\uc778\ub370 \uc774\uac74 \uc804\ub958\uac00 \ud50c\ub808\uc774\ud2b8\uc640 \uc2a4\ud06c\ub9b0 \uadf8\ub9ac\ub4dc \uc0ac\uc774\uc5d0\uc11c \ub79c\ub364\ud558\uac8c \uafc0\ub801\uac70\ub9ac\uae30 \ub54c\ubb38. \uc774\uac78 \ud30c\ud2f0\uc158 \ub178\uc774\uc988\ub77c\uace0 \ud55c\ub2e4. \ubb3c\ub860 \uc774 \uc8fc\uc7a5\uc740 \uacfc\uc7a5\ub41c \uac83\uc774\ub77c\uc11c \uc2e4\uc81c\ub85c\ub294 \ub178\uc774\uc988 \ucc28\uc774\uac00 2dB \uc815\ub3c4\uc5d0 \ubd88\uacfc\ud558\uace0 \uadf9\ub2e8\uc801\uc778 \ucc28\uc774\ub77c\ub3c4 6dB \uc815\ub3c4\ub77c\uc11c \ud06c\uac8c \uac71\uc815\ub418\ub294 \uc815\ub3c4\ub294 \uc544\ub2c8\ub2e4. \uadf8\ub9ac\ub4dc \uc2a4\ud1a0\ud37c \uc800\ud56d\uc774 \uc77c\ubc18\uc801\uc73c\ub85c \ub354 \ud070 \ub178\uc774\uc988 \uc18c\uc2a4\ub2e4.<\/p>\n\n\n\n

\ubb38\uc81c\ub294 \uc5ed\uc2dc \ub9c8\uc774\ud06c\ub85c\ud3ec\ub2c9\uc778\ub370 \uadf8\ub9ac\ub4dc\uac00 2\uac1c \ub354 \uc788\uace0 \uad6c\uc870\uac00 \ub354 airy \ud574\uc11c \uadf8\ub807\ub2e4. \uc2a4\ud53c\ucee4\uac00 \ub0b4\uc7a5\ub41c \ucf64\ubcf4 \uae30\ud0c0\uc570\ud504\uc5d0\uc11c\ub294 \ub354 \uadf8\ub807\ub2e4. \uc5ed\uc2dc 5\uadf9\uad00\uc740 \ucd08\ub2e8\ubcf4\ub2e4\ub294 \ub4dc\ub77c\uc774\ube0c \ub2e8\uc5d0\ub098 \uc4f0\ub294 \uac83\uc774\ub2e4.<\/p>\n\n\n

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

\uad6c\uc870<\/strong><\/p>\n\n\n\n

Suppressor Grid (g3)<\/p>\n\n\n\n

\uc804\uc790\uac00 anode\ub97c \uccd0\uc11c \ud50c\ub808\uc774\ud2b8 \ud45c\uba74\uc758 \ub2e4\ub978 \uc804\uc790\ub4e4\uc744 \ud574\ubc29\uc2dc\ud0ac \uc218 \uc788\uc744 \uc815\ub3c4\uba74, \uc774 \ud604\uc0c1\uc744 secondary emission\uc774\ub77c\uace0 \ud568. \uadf8\ub9ac\uace0 \ud574\ubc29\ub41c \uc804\uc790\ub294 \uc704\uc758 \uadf8\ub9bc\uc5d0\uc11c secondary electrons\ub77c\uace0 \ud45c\ud604\ub418\uc5b4 \uc788\uc74c. 3\uadf9\uad00\uc5d0\uc11c\ub294 \uc774 \ub188\ub4e4\uc774 \ub2e4\uc2dc \ud50c\ub808\uc774\ud2b8\ub85c \uc7a1\ud600\uac00\ubbc0\ub85c \ubb38\uc81c\uac00 \uc5c6\ub294\ub370 5\uadf9\uad00\uc5d0\uc11c\ub294 \uc2a4\ud06c\ub9b0 \uadf8\ub9ac\ub4dc\ub85c \uc7a1\ud600\uac08 \uc218\ub3c4 \uc788\uc74c. Suppressor grid\uac00 \uc788\ub294 \uc774\uc720\uac00 \uc774\uac78 \ubc29\uc9c0\ud558\ub294 \ubaa9\uc801\uc784. G3\ub294 G2\ubcf4\ub2e4 \ub354 \uc74c\uc804\uc555\uc744 \uac00\uc9c0\ub3c4\ub85d \ud568 (\ub300\uac1c\ub294 \uce90\uc18c\ub4dc\uc640 \ubb36\uc5b4\ubc84\ub9bc) \ub355\ubd84\uc5d0 secondary electron\uc740 \ub2e4\uc2dc \ud50c\ub808\uc774\ud2b8\ub85c \ubc29\ud5a5\uc744 \ub3cc\ub9b4 \uc218 \ubc16\uc5d0 \uc5c6\uc74c. G3\ub97c \uac00\uc9c0\uace0 \ubb54\uac00 \ud601\uc2e0\uc801\uc774\uace0 \ub611\ub611\ud55c \uc77c\uc744 \ud560 \ub2a5\ub825\uc774 \uc5c6\ub2e4\uba74 \uce90\uc18c\ub4dc\uc640 \ubb36\uae30 \ubc14\ub78c. \ube54 \ud29c\ube0c\uc5d0\uc11c\ub294 \uc544\uc608 \ubb36\uc5b4\uc11c \ub098\uc634.<\/p>\n\n\n\n

Screen Grid (g2)<\/p>\n\n\n\n

G2\ub294 \uc804\uc790\ub97c \uac78\ub7ec\ub0b4\ub294 \uc5ed\ud560\uc744 \ud558\ub294\ub370 \ub300\uac1c \uc77c\uc815\ud55c \uc804\uc555\uc744 \uac00\ud568\uc73c\ub85c \uc804\uc790\ub4e4\uc774 g2 \ucabd\uc73c\ub85c \uac00\uc18d\ub418\ub3c4\ub85d \ub9cc\ub4e4\uace0 \uadf8\uac8c \ub05d\uc784. G2\ub97c \ud1b5\uacfc\ud55c \uc804\uc790\ub294 \uacb0\uad6d \ud50c\ub808\uc774\ud2b8\uc5d0 \ucda9\ub3cc\ud568. \ud50c\ub808\uc774\ud2b8\uc758 \uac00\ubcc0 \uc804\uae30\uc7a5\uc774 \ubb54\uac00 \uc548\uc88b\uc744 \uc77c\uc744 \ud560 \uac00\ub2a5\uc131\uc744 \ucc28\ub2e8\ud55c\ub2e4\uace0 \ud560 \uc218 \uc788\uc74c. Miller effect\uac00 \ucd5c\uc18c\ud654\ub418\ub294 \uac83\uc784. \ub355\ubd84\uc5d0 5\uadf9\uad00 \uc2a4\ud14c\uc774\uc9c0\ub294 \ub77c\ub514\uc624 \uc8fc\ud30c\uc218 \ub300\uc5ed\uc5d0\uc11c \uc798 \ub3d9\uc791\ud560 \uc218 \uc788\uac8c \ub418\ub294\ub370, \ubb3c\ub860 \uae30\ud0c0 \uc570\ud504\uc5d0\uc11c\ub294 \uad00\uc2ec \ubc16\uc758 \uc7a5\uc810\uc784.<\/p>\n\n\n\n

\uadf8\ub7ec\ub098 \uc5b4\ub5a4 \uc804\uc790\ub4e4\uc740 g2\uc5d0 \ucda9\ub3cc\ud558\uae30\ub3c4 \ud574\uc11c \uc804\ub958\ub97c \ub9cc\ub4e4\uc5b4\ub0c4. \uadf8\ub7ec\uba74 \uc804\ub825 \uc18c\ubaa8\uac00 \uc0dd\uae30\ub2c8 \ub728\uac70\uc6cc\uc9d0. g2\ub294 \uc5c4\uccad \uc5f0\uc57d\ud558\uae30 \ub54c\ubb38\uc5d0 \uc774\uac8c \ub728\uac70\uc6cc\uc838\uc11c \ub179\uc9c0 \uc54a\ub3c4\ub85d \uc8fc\uc758\ud574\uc57c \ud568. \ucd08\ub2e8\uc5d0 \uc0ac\uc6a9\ub418\ub294 5\uadf9\uad00\uc5d0\uc11c\ub294 \uc798 \ubc1c\uc0dd\ud558\ub294 \uc77c\uc774 \uc544\ub2c8\uaca0\uc9c0\ub9cc, \ud30c\uc6cc\ub2e8\uc5d0 \uc0ac\uc6a9\ub418\ub294 \ud29c\ube0c\uc5d0\uc11c\ub294 \ud754\ud788 \ubc1c\uc0dd\ud558\ub294 \uc77c\uc774\ub77c\uc11c \uc544\ub9c8\ub3c4 \ud30c\uc6cc \ucd9c\ub825\uad00\uc774 \ub9dd\uac00\uc9c0\ub294 \uac00\uc7a5 \ud070 \uc6d0\uc778\uc774 \uc544\ub2d0\uae4c \ud568.<\/p>\n\n\n\n

Static Anode Characteristic Curves<\/strong><\/p>\n\n\n\n

5\uadf9\uad00\uc758 \ud2b9\uc131 \uadf8\ub798\ud504\ub294 \ud2b8\ub79c\uc9c0\uc2a4\ud130\ub97c \ub9ce\uc774 \ub2ee\uc544 \uc788\uc74c. \ud558\uc9c0\ub9cc \ud2b8\ub79c\uc9c0\uc2a4\ud130\uc640 \ub2ec\ub9ac \uace0\uc815\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc74c. \uc2a4\ud06c\ub9b0 \uc804\uc555\uc744 \uc62c\ub9ac\uba74 \uadf8\ub798\ud504\uac00 \uc704\ub85c \uc62c\ub77c\uac00\uace0 \uc804\uc555\uc744 \uc904\uc774\uba74 \uadf8\ub798\ud504\uac00 \uc904\uc5b4\ub4ec. \uadf8\ub7ec\ubbc0\ub85c 5\uadf9\uad00\uc744 \uc774\uc6a9\ud574\uc11c \uc124\uacc4\ud560 \ub54c \uc5b4\ub824\uc6b4 \uac83\uc774 \uc5b4\ub514\ub97c \uc774\uc6a9\ud560 \uac83\uc778\uac00 \ud558\ub294 \uc810\uc784. \ub370\uc774\ud130\uc2dc\ud2b8\uc5d0 \ub098\uc628 \uac12\uc740 \uc2e4\uc81c \uc0ac\uc6a9\ub418\ub294 60~100V\ubcf4\ub2e4 \ud6e8\uc52c \ub192\uc740 \uc804\uc555\uc744 \uae30\uc7ac\ud558\uace0 \uc788\uc74c. (\ubc18\ub300\ub85c \ud30c\uc6cc \ucd9c\ub825\uad00\uc740 \ub0ae\uc740 \uac12\uc744…) <\/p>\n\n\n

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

100V\ub97c \uc4f0\uace0 \uc2f6\uc9c0\ub9cc, 150V \uc2a4\ud06c\ub9b0 \uc804\uc555\uc5d0 \ub300\ud55c \uc608\ub97c \ub370\uc774\ud130\uc2dc\ud2b8\uc5d0\uc11c \ubcf4\uac8c \ub41c\ub2e4\uba74 50\/150 = 1\/3 \ud574\uc11c 1\/3\ub9cc\ud07c \uc904\uc778 \uac83\uc73c\ub85c \uadfc\uc0ac\uce58\ub97c \uc7a1\uc544\uc11c \ubcf4\uba74 \uc815\ud655\ud558\uc9c0\ub294 \uc54a\uc9c0\ub9cc \ud06c\uac8c \ubabb \uc4f8 \uac83\ub3c4 \uc5c6\uc74c. <\/p>\n\n\n\n

\uc798 \ub9cc\ub4e4\uc5b4\uc9c4 \ub370\uc774\ud130\uc2dc\ud2b8\ub294 mutual conductance \uadf8\ub798\ud504\ub3c4 \uc788\ub294 \uacbd\uc6b0\uac00 \ub9ce\uc740\ub370, \uc774\uac78 \uac19\uc774 \uc4f0\uba74 \ub354 \uc815\ud655\ud55c \uadfc\uc0ac\ub97c \uc5bb\uc744 \uc218 \uc788\uc74c. \uc704\uc758 \uadf8\ub9bc\uc5d0 \ubcf4\uba74 EF86\uc744 \uac00\uc9c0\uace0 \uc2a4\ud06c\ub9b0 \uc804\uc555 100V\uc5d0 \ub300\ud55c \uadfc\uc0ac \uadf8\ub798\ud504\ub97c \ub9cc\ub4e4\uace0 \uc788\ub294\ub370 \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 \ub0b4 \ucc45\uc744 \ubcf4\uae30 \ubc14\ub78c \u3161.\u3161<\/p>\n\n\n\n

(\uc5ed\uc8fc) EF86 \ub370\uc774\ud130\uc2dc\ud2b8\uc5d0 \ubcf4\uba74 \uc544\ub798\uc640 \uac19\uc774 Va=500V, Vg2=140V\uc5d0 \ub300\ud55c \uadf8\ub798\ud504\uac00 \uc788\uc74c. <\/p>\n\n\n

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

\uc774\uc81c \uadfc\uc0ac\uce58 \uadf8\ub798\ud504\uac00 \uc788\uc73c\ubbc0\ub85c \ub85c\ub4dc\ub77c\uc778\uc744 \uace0\ub97c \uc218 \uc788\uc74c. \ucd5c\ub300 \ucd9c\ub825 \uc2a4\uc719\uacfc \uc88b\uc740 \uc9c1\uc120\uc131\uc744 \uac00\uc9c0\ub824\uba74 \ub85c\ub4dc\ub77c\uc778\uc774 \ucee4\ube0c\uc758 \ubb34\ub98e\uc744 \ud1b5\uacfc\ud574\uc57c \ud568. \uc774\uac8c \ud558\uc774\ud30c\uc774\uc758 \uc815\uc11d\uc784. \ubb34\ub98e \uc704\ub97c \ud1b5\uacfc\ud558\uba74 \uac8c\uc778\uacfc \uc2a4\uc719\uc774 \uc904\uc5b4\ub4e4\uace0 \ud640\uc218\ucc28 \ubc30\uc74c\uc774 \uc904\uc5b4\ub4e4\uba74\uc11c \ub3d9\uc791\uc774 3\uadf9\uad00 \ub2ee\uc544\uac10. \ubb34\ub98e \uc544\ub798\ub97c \ud1b5\uacfc\ud558\uba74 \ud5e4\ub4dc\ub8f8\uc774 \uc904\uc5b4\ub4e4\uace0 \ud074\ub9ac\ud551\uc774 \ube44\ub300\uce6d\uc801\uc774 \ub428. \uc774\uac74 \ud558\uc774\ud30c\uc774\uc5d0\ub294 \ub098\uc05c\uac74\ub370, \uae30\ud0c0\uc570\ud504\uc5d0\ub294 \uc88b\uc740 \uac83\uc784.<\/p>\n\n\n

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

HT \uc804\uc555\uc774 250V, 68K \ubd80\ud558\ub97c \uac00\uc815\ud574\ubcf4\uba74 \uc704\uc758 \uadf8\ub798\ud504\uc640 \uac19\uc774 \ucd5c\ub300 \ud50c\ub808\uc774\ud2b8 \ud30c\uc6cc \ucee4\ube0c\uc5d0 \uc804\ud600 \uac00\uae5d\uc9c0 \uc54a\uc740 \uc88b\uc740 \uc704\uce58\uc5d0 \ub85c\ub4dc\ub77c\uc778\uc774 \ub4e4\uc5b4\uc11c\uac8c \ub428.<\/p>\n\n\n\n

\uc2a4\ud06c\ub9b0 \uc804\uc555 \uc124\uc815<\/strong><\/p>\n\n\n\n

HT \uc804\uc555\uc5d0 \uc800\ud56d\uc744 \ud558\ub098 \ub2ec\uc544\uc11c g2\uc5d0 \uc5f0\uacb0\ud558\ub294 \uc2dd\uc73c\ub85c \uc2a4\ud06c\ub9b0 \uc804\uc555\uc744 \uc124\uc815\ud558\uac8c \ub428. \uc800\ud56d \uac12\uc744 \uc815\ud558\ub824\uba74 \uc2a4\ud06c\ub9b0 \uc804\ub958\ub97c \uc54c\uc544\uc57c \ud558\ub294\ub370 \uc634\uc758 \ubc95\uce59\uc744 \uc4f0\uba74 \ub428. \uc2a4\ud06c\ub9b0 \uc804\ub958\ub294 \ud50c\ub808\uc774\ud2b8 \uc804\ub958\uc758 \uba87 \ud37c\uc13c\ud2b8\ub85c \uc815\ud574\uc9d0. EF86 \ub370\uc774\ud130\uc2dc\ud2b8\uc5d0 \ubcf4\uba74 \ud50c\ub808\uc774\ud2b8 \uc804\ub958\uac00 3.0mA\uba74 \uc2a4\ud06c\ub9b0 \uc804\ub958\ub294 0.6mA\uc784. \uc989 3.0\/0.6=5\uc758 \ube44\uc728\uc784.<\/p>\n\n\n\n

\uc704\uc758 \uc608\uc5d0\uc11c \ubcf4\uba74 \ub3d9\uc791\uc810\uc744 -1.5V \ubc14\uc774\uc5b4\uc2a4\uc5d0\uc11c \uc7a1\uc558\ub294\ub370 \uc774 \ub54c \ud50c\ub808\uc774\ud2b8 \uc804\ub958 Ia\ub294 1.9mA\uc784. \uadf8\ub7ec\ubbc0\ub85c 5\ub85c \ub098\ub204\uba74 1.9mA\/5=0.38mA\uac00 \ub428. <\/p>\n\n\n\n

\uc9c0\uae08\uc758 \uc608\uc5d0\uc11c\ub294 Vg2=100\uc744 HT 250V\ub85c\ubd80\ud130 \uac10\uc555\ud574\uc11c \uc5bb\uc73c\ub824\uace0 \ud558\ubbc0\ub85c (250-100)V\/0.38mA=395Kohm\uc774 \ub098\uc634. \ud45c\uc900 \uc800\ud56d\uce58\ub97c \ucc3e\uc544\ubcf4\uba74 390K\uac00 \uc801\ub2f9\ud558\uace0 \uc57d 60mW\ub97c \uc18c\ubaa8\ud560 \uac83\uc784. 1\/2W \uc800\ud56d\uc774\uba74 \ucda9\ubd84\ud568.<\/p>\n\n\n\n

\uc2a4\ud06c\ub9b0 \ubc14\uc774\ud328\uc2a4 \ucea1<\/strong><\/p>\n\n\n\n

\uc2a4\ud06c\ub9b0 \ubc14\uc774\ud328\uc2a4 \ucea1\uc740 \uce90\uc18c\ub4dc \ubc14\uc774\ud328\uc2a4 \ucea1\uacfc \uc720\uc0ac\ud55c \uc77c\uc744 \ud568. \uc2a4\ud06c\ub9b0 \uc804\uc555\uc744 \uc77c\uc815\ud558\uac8c \uc7a1\uc544\uc11c \ub0b4\ubd80\uc758 NFB\uac00 \uac8c\uc778\uc744 \ub5a8\uc5b4\ub728\ub9ac\uc9c0 \ubabb\ud558\uac8c \ud568. \ud558\uc9c0\ub9cc \uace0\uc5ed\ub300\ub97c \uc704\ud574\uc11c \uc544\uc8fc \uc791\uc740 \uac12\uc744 \uc368\ub3c4 \ub418\uace0, \uac8c\uc778\uc744 \uc190\ud574\ubcf4\ub354\ub77c\ub3c4 \uc544\uc608 \ubc14\uc774\ud328\uc2a4 \ucea1\uc744 \ub2ec\uc9c0 \uc54a\uace0 \ub300\uc2e0 \ud5e4\ub4dc\ub8f8\uc744 \ub298\ub9b4 \uc218\ub3c4 \uc788\uc74c. \uc804\ud1b5\uc758 \uae30\ud0c0 \uc570\ud504\ub4e4 \ubcf4\uba74 \uc548 \ub2ec\uace0 \uc788\uc74c.<\/p>\n\n\n\n

\uc2a4\ud06c\ub9b0 \ubc14\uc774\ud328\uc2a4 \ucea1\uc740 \uce90\uc18c\ub4dc \ubc14\uc774\ud328\uc2a4 \ucea1\ubcf4\ub2e4 \uac8c\uc778\uc5d0 \uc601\ud5a5\uc744 \ub354 \ub9ce\uc774 \uc90c. \uadf8\ub9ac\uace0 \uadf8\ub77c\uc6b4\ub4dc \ub9d0\uace0 \uce90\uc18c\ub4dc\uc5d0 \uc5f0\uacb0\ud574\uc57c \ud568. \ub9ce\uc740 \ud68c\ub85c\uc5d0\uc11c \uadf8\ub77c\uc6b4\ub4dc \uc9c1\uacb0\uc744 \ud55c \uac83\uc744 \uc54c\uace0 \uc788\uc9c0\ub9cc \ub098\ub294 \uc88b\uc740 \uad6c\ud604\uc774\ub77c\uace0 \ubcf4\uc9c0 \uc54a\uc74c.<\/p>\n\n\n\n

Cg2 = 1\/(2 pi f Rg2)<\/p>\n\n\n\n

\ubaa8\ub4e0 \uc74c\uc5ed\ub300\ub97c \ub2e4 \ud1b5\uacfc\uc2dc\ud0a4\uace0 \uc2f6\uc73c\uba74 f\ub97c 10Hz \uadfc\ucc98\ub85c \uc7a1\uc74c. \uadf8\ub7fc \uc704\uc758 \uc608\uc5d0\uc11c\ub294,<\/p>\n\n\n\n

Cg2 = 1\/(2×3.13x10x390K) = 40.8nF.<\/p>\n\n\n\n

47nF \uc815\ub3c4\ub97c \uc120\ud0dd\ud558\uba74 \ub418\uaca0\uc74c.<\/p>\n\n\n\n

Biasing<\/strong><\/p>\n\n\n\n

\uadf8\ub798\ud504\uc5d0\uc11c \uc5bb\uc744 \uc218 \uc788\ub294 \ud50c\ub808\uc774\ud2b8 \uc804\ub958\ub294 \uce90\uc18c\ub4dc \uc804\ub958\uc640 \uac19\uc9c0 \uc54a\uc74c. \uce90\uc18c\ub4dc \uc804\ub958\ub294 \ud50c\ub808\uc774\ud2b8 \uc804\ub958\uc5d0 \uc2a4\ud06c\ub9b0 \uc804\ub958\uac00 \ub354\ud574\uc9c4 \uac83\uc784. \uc774 \uacbd\uc6b0\ub294 1.9 + 0.38 = 2.28mA\uac00 \ub418\uaca0\uc74c.<\/p>\n\n\n

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

\uc120\ud0dd\ud55c \ubc14\uc774\uc5b4\uc2a4 \uc804\uc555\uc740 -1.5V\ub85c, \uc774\uc81c \uce90\uc18c\ub4dc \uc800\ud56d\uc740 \uc634\uc758 \ubc95\uce59\uc744 \uc774\uc6a9\ud558\uba74 \ub428<\/p>\n\n\n\n

1.5V\/2.28mA = 658ohm<\/p>\n\n\n\n

680\uc634 \uc815\ub3c4\uba74 \ub418\uaca0\uc74c. \uc800\ud56d \ub9d0\uace0 \uc2e4\ub9ac\ucf58 \ub2e4\uc774\uc624\ub4dc\ub098 LED\ub97c \uc368\ub3c4 \ub428. \uc774 \ub54c\ub294 \ubc14\uc774\ud328\uc2a4 \ucea1\uc774 \uc5c6\uc5b4\ub3c4 \ub428.<\/p>\n\n\n\n

\ub370\uc774\ud130\uc2dc\ud2b8\uc5d0 \ubcf4\uba74 \ud50c\ub808\uc774\ud2b8\uc5d0\uc11c 0.2W \uc774\uc0c1\uc744 \uc4f0\uba74 \uadf8\ub9ac\ub4dc \ub9ac\ud06c \uc800\ud56d\uc740 3\uba54\uac00 \uc774\ud558\uc5ec\uc57c \ud568. \uc6b0\ub9ac\ub294 \ub300\uac1c 1Meg\ub97c \uc4f0\uace4 \ud568.<\/p>\n\n\n\n

\uce90\uc18c\ub4dc \ubc14\uc774\ud328\uc2a4 \ucea1<\/strong><\/p>\n\n\n\n

\ub300\uac1c \uc544\ub798\uc640 \uac19\uc774 \uad6c\ud568<\/p>\n\n\n\n

f = 1\/(2 pi Rk Ck)<\/p>\n\n\n\n

\uc800\uc5ed\ub300\ub97c \uc880 \uae4e\uace0 \uc2f6\uc740 \uae30\ud0c0 \uc570\ud504\ub77c\uba74 300Hz \ucbe4\uc5d0\uc11c f\ub97c \uc120\uc815\ud574 \ubcf4\uaca0\uc74c. <\/p>\n\n\n\n

Ck = 1\/(2 pi Rk f) = 1\/(2 x 3.14 x 680 x 300) = 780nF<\/p>\n\n\n\n

\uadf8\ub7ec\ubbc0\ub85c 820nF \uc815\ub3c4\ub97c \uc120\ud0dd\ud558\uba74 \ub418\ub294 \uc911\uc694\ud55c \uac83\uc740 \uadc0\ub85c \ub4e3\uace0 \ud29c\ub2dd\ud558\ub294 \uac83\uc784<\/p>\n\n\n\n

\uc804\uc555 \uc774\ub4dd<\/strong><\/p>\n\n\n\n

Voltage gain\uc740 \ub85c\ub4dc\ub77c\uc778\uc5d0\uc11c \uc77d\uc5b4\ub0b4\uac70\ub098 \uacf5\uc2dd\uc744 \ud1b5\ud574\uc11c \ucd94\uc815\ud560 \uc218 \uc788\uc74c<\/p>\n\n\n\n

A = gm x Ra<\/p>\n\n\n\n

gm\uc744 1.6mA\/V\ub85c \ucd94\uc815\ud558\uba74 A = 1.6 x 68K = 109\ubc30\uac00 \ub428.<\/p>\n\n\n\n

\ubb3c\ub860 \ub2e4\uc74c \ub2e8\uc774 \ubd99\uc73c\uba74 \uc880 \uc904\uc5b4\ub4e4\uac8c \ub428.<\/p>\n\n\n\n

\ucd9c\ub825 \uc784\ud53c\ub358\uc2a4<\/strong><\/p>\n\n\n\n

\ud50c\ub808\uc774\ud2b8\uc758 \ucd9c\ub825 \uc784\ud53c\ub358\uc2a4\ub294 \ud50c\ub808\uc774\ud2b8 \ubd80\ud558 \uc800\ud56d\uc744 5\uadf9\uad00\uc758 \ub0b4\ubd80 \uc800\ud56d\uacfc \ubcd1\ub82c\ub85c \uc5f0\uacb0\ud55c \ud569\uc131 \uc800\ud56d\uacfc \uac19\uc9c0\ub9cc, \ub0b4\ubd80 \uc800\ud56d\uc740 \ud6e8\uc52c \ub354 \ud06c\uae30 \ub54c\ubb38\uc5d0 \uae30\ubcf8\uc801\uc73c\ub85c \ucd9c\ub825 \uc784\ud53c\ub358\uc2a4\ub294 \ud50c\ub808\uc774\ud2b8 \ubd80\ud558 \uc800\ud56d\uacfc \uac19\ub2e4\uace0 \ubcf4\uba74 \ub428.<\/p>\n\n\n\n

\uc774 \uc784\ud53c\ub358\uc2a4\ub294 \ub108\ubb34 \ud06c\uae30 \ub54c\ubb38\uc5d0 5\uadf9\uad00\uc744 \uc4f0\uba74 \ub300\uac1c \ub2e4\uc74c \ub2e8\uc5d0 \ubc84\ud37c\ub97c \ub450\uac8c \ub9c8\ub828\uc784.<\/p>\n","protected":false},"excerpt":{"rendered":"

\uae30\ud0c0 \uc570\ud504\uc5d0\uc11c \ucd08\ub2e8\uc5d0 5\uadf9\uad00\uc744 \ubcf4\uae30\ub294 \uc27d\uc9c0 \uc54a\uc74c. 12AX7\uc774 \uc655\ub178\ub987\ud558\ub294 \ub3d9\ub124\ub77c\uc11c… \ucd08\uae30 VOX AC30 \uc885\ub958\uc5d0\uc11c\ub294 EF86\uc774 \uc720\uba85\ud588\ub294\ub370 \uc57d 200\ubc30 \uac8c\uc778\uc744 \uc790\ub791\ud588\uc9c0\ub9cc \ub9c8\uc774\ud06c\ub85c\ud3ec\ub2c9\uc5d0 \uadf9\ud788 \ucde8\uc57d\ud574\uc11c \ubb38\uc81c. \ub300\ucc45\ub3c4 \uc5c6\uc5c8\uae30 \ub54c\ubb38\uc5d0 \ub098\uc911\uc5d0\ub294 \ub2e4 12AX7\uc774 \ub300\uccb4\ud588\uc74c. \ud558\uc9c0\ub9cc 5\uadf9\uad00\uc740 3\uadf9\uad00\uacfc \ub2e4\ub978 \ud1a4\uc744 \ub0bc \uc218 \uc788\uc74c. \ud640\uc218\ucc28 \ubc30\uc74c\uc774 \uc880 \ub354 \ub9ce\uace0 ‘glassy” \uc0ac\uc6b4\ub4dc\uac00 \uc788\uc74c. \uc624\ubc84\ub4dc\ub77c\uc774\ube0c\ub97c \uac78\uba74 \ud3c9\uade0 \uc2a4\ud06c\ub9b0 \uc804\ub958\uac00 \ub298\uc5b4\ub098\uba74\uc11c \ucef4\ud504\ub808\uc158 \ud6a8\uacfc\uac00 …
(\uacf5\ubd80) \ucd08\ub2e8\uc6a9 Pentode<\/span> \ub354\ubcf4\uae30<\/a><\/p>\n","protected":false},"author":1,"featured_media":3427,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[453,1,473],"tags":[],"class_list":["post-3426","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-453","category-uncategorized","category-473"],"_links":{"self":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/3426","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=3426"}],"version-history":[{"count":4,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/3426\/revisions"}],"predecessor-version":[{"id":3437,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/posts\/3426\/revisions\/3437"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=\/wp\/v2\/media\/3427"}],"wp:attachment":[{"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3426"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3426"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kyu.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3426"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}