銆�銆�鎭掓祦婧愬垎鐐烘祦鍑�(Current Source)鍜屾祦鍏�(Current Sink)鍏╃ó褰㈠紡銆�
銆�銆�1.鏈�绨�(ji菐n)鍠殑鎭掓祦婧愶紝灏辨槸鐢ㄤ竴鍙亽娴佷簩妤电銆傚(sh铆)闅涗笂锛屾亽娴佷簩妤电鐨勬噳(y墨ng)鐢ㄦ槸姣旇純灏戠殑锛岄櫎浜嗗洜?y脿n)妤规嚁闉O绠＄殑鎭掓祦鐗规�у苟涓嶆槸闈炲父濂戒箣澶�锛岄浕娴佽(gu墨)鏍兼瘮杓冨皯锛屽児(ji脿)鏍兼瘮杓冭泊涔熸槸閲嶈鍘熷洜銆�
銆�銆�2.鏈�甯哥敤鐨勭啊(ji菐n)鏄撴亽娴佹簮濡傚湒(1) 鎵�绀�锛岀敤鍏╁彧鍚屽瀷涓夋サ绠�锛屽埄鐢ㄤ笁妤电鐩稿皪(du矛)绌�(w臎n)瀹氱殑be闆诲浣滅偤鍩烘簴(zh菙n)锛�闆绘祦鏁�(sh霉)鍊肩偤锛欼 = Vbe/R1銆�
銆�銆�閫欑ó鎭掓祦婧愬劒(y艒u)榛�(di菐n)鏄啊(ji菐n)鍠槗琛�锛岃�屼笖闆绘祦鐨勬暩(sh霉)鍊煎彲浠ヨ嚜鐢辨帶鍒�锛屼篃娌掓湁浣跨敤鐗规畩鐨勫厓浠�锛屾湁鍒╀簬闄嶄綆鐢�(ch菐n)鍝佺殑鎴愭湰銆傜己榛�(di菐n)鏄笉鍚屽瀷铏�(h脿o)鐨勭瀛愶紝鍏禸e闆诲涓嶆槸涓�鍊�(g猫)鍥哄畾鍊�锛屽嵆浣挎槸鐩稿悓鍨嬭櫉(h脿o)锛屼篃鏈変竴瀹氱殑鍊�(g猫)楂斿樊鐣�銆傚悓鏅�(sh铆)涓嶅悓鐨勫伐浣滈浕娴佷笅锛岄�欏��(g猫)闆诲涔熸渻(hu矛)鏈変竴瀹氱殑娉㈠嫊(d貌ng)銆傚洜姝や笉閬╁悎绮惧瘑鐨勬亽娴侀渶姹�銆�
銆�銆�3.鐐轰簡鑳藉绮剧⒑杓稿嚭闆绘祦锛岄�氬父浣跨敤涓�鍊�(g猫)閬�(y霉n)鏀句綔鐐哄弽楗�锛屽悓鏅�(sh铆)浣跨敤鍫�(ch菐ng)鏁堟噳(y墨ng)绠￠伩鍏嶄笁妤电鐨刡e闆绘祦灏�(d菐o)鑷寸殑瑾ゅ樊銆傚吀鍨嬬殑閬�(y霉n)鏀炬亽娴佹簮濡傚湒(2)鎵�绀�锛屽鏋滈浕娴佷笉闇�瑕佺壒鍒ョ簿纰�锛屽叾涓殑鍫�(ch菐ng)鏁堟噳(y墨ng)绠′篃鍙互鐢ㄤ笁妤电浠ｆ浛銆�
銆�銆�闆绘祦瑷�(j矛)绠楀叕寮忕偤锛欼 = Vin/R1
銆�銆�閫欏��(g猫)闆昏矾鍙互瑾�(r猫n)鐐烘槸鎭掓祦婧愮殑妯�(bi膩o)婧�(zh菙n)闆昏矾锛岄櫎浜嗚冻澶犵殑绮惧害鍜屽彲瑾�(di脿o)鎬т箣澶栵紝浣跨敤鐨勫厓浠朵篃閮芥槸寰堟櫘閬嶇殑锛屾槗浜庢惌寤哄拰瑾�(di脿o)瑭�銆傚彧涓嶉亷鍏朵腑鐨刅in閭勯渶瑕佺敤鎴堕澶栨彁渚涖��
銆�銆�寰炰互涓婂叐鍊�(g猫)闆昏矾鍙互鐪嬪嚭锛屾亽娴佹簮鏈夊��(g猫)瀹氬紡锛屽氨鏄埄鐢ㄤ竴鍊�(g猫)闆诲鍩烘簴(zh菙n)锛屽湪闆婚樆涓婂舰鎴愬浐瀹氶浕娴�銆傛湁浜嗛�欏��(g猫)瀹氬紡锛屾亽娴佹簮鐨勬惌寤哄氨鍙互鎿�(ku貌)灞曞埌鎵�鏈夊彲浠ユ彁渚涢�欏��(g猫)鈥滈浕澹撳熀婧�(zh菙n)鈥濈殑鍣ㄤ欢涓�銆�
銆�銆�4.鏈�绨�(ji菐n)鍠殑闆诲鍩烘簴(zh菙n)锛屽氨鏄┅(w臎n)澹撲簩妤电锛屽埄鐢ㄧ┅(w臎n)澹撲簩妤电鍜屼竴鍙笁妤电锛屽彲浠ユ惌寤轰竴鍊�(g猫)鏇寸啊(ji菐n)鏄撶殑鎭掓祦婧�锛屽鍦�(3)鎵�绀恒��
銆�銆�闆绘祦瑷�(j矛)绠楀叕寮忕偤锛欼 = (Vd-Vbe)/R1
銆�銆�5.TL431鏄彟澶栦竴鍊�(g猫)甯哥敤鐨勯浕澹撳熀婧�(zh菙n)锛屽埄鐢═L431鎼缓鐨勬亽娴佹簮濡傚湒(4)鎵�绀�锛屽叾涓殑涓夋サ绠℃浛鎻涚偤鍫�(ch菐ng)鏁堟噳(y墨ng)绠″彲浠ュ緱鍒版洿濂界殑绮惧害
銆�銆�闆绘祦瑷�(j矛)绠楀叕寮忕偤锛欼 = 2.5/R1
銆�銆�6.浜嬪(sh铆)涓婏紝鎵�鏈夌殑涓夌绌�(w臎n)澹�锛岄兘鏄緢涓嶉尟(cu貌)鐨勯浕澹撴簮锛岃�屼笖涓夌绌�(w臎n)澹撶殑绮惧害宸茬稉(j墨ng)寰堥珮锛岄渶瑕佺殑缍寔闆绘祦涔熷緢灏�銆傚埄鐢ㄤ笁绔┅(w臎n)澹撴(g貌u)鎴愭亽娴佹簮锛屼篃鏈夐潪甯稿ソ鐨勬�у児(ji脿)姣�锛屽鍦�(5)鎵�绀�銆傞�欑ó绲�(ji茅)妲�(g貌u)鐨勬亽娴佹簮锛屼笉閬╁悎澶皬鐨勯浕娴�锛屽洜?y脿n)妾獲鍊�(g猫)鏅�(sh铆)鍊欙紝涓夌绌�(w臎n)澹撹嚜韬殑缍寔闆绘祦鏈�(hu矛)灏�(d菐o)鑷磋純澶х殑瑾ゅ樊銆傞浕娴佽▓(j矛)绠楀叕寮忕偤锛欼 = V/R1锛屽叾涓璙鏄笁绔┅(w臎n)澹撶殑绌�(w臎n)澹撴暩(sh霉)鍊�銆�
銆�銆�7.瀵�(sh铆)闅涚殑闆昏矾涓�锛屾湁涓�浜涚壒娈婄殑绲�(ji茅)妲�(g貌u)锛屼篃鍙互鎻愪緵寰堝ソ鐨勬亽娴佺壒鎬�锛屾渶鍏稿瀷鐨勫氨鏄竴鍊�(g猫)寰堥珮鐨勯浕澹撻�氶亷涓�鍊�(g猫)闆婚樆鍦ㄤ竴鍊�(g猫)浣庡瑷�(sh猫)鍌欎笂褰㈡垚闆绘祦锛屽鍦�(6)锛岄�欏��(g猫)鎭掓祦婧愮殑绮惧害锛屽彇姹轰簬楂樺鐨勭簿纰哄害鍜屼綆澹撹ō(sh猫)鍌欐湰韬皫(d菐o)鑷寸殑闆诲娉㈠嫊(d貌ng)銆傚湪涓�浜涢枊闂�(gu膩n)闆绘簮闆昏矾涓紝閫欏��(g猫)绲�(ji茅)妲�(g貌u)鐢ㄤ締(l谩i)绲︿笁妤电鎻愪緵鍋忕疆闆绘祦銆�
銆�銆�闆绘祦瑷�(j矛)绠楀叕寮忕偤锛� I = Vin/R1
銆�銆�鍊煎緱涓�鎻愮殑鏄�锛屼互涓婇�欎簺鎭掓祦婧愬苟涓嶉兘閬╁悎瀹夊煿浠ヤ笂绱�(j铆)鍒ョ殑鎭掓祦鎳�(y墨ng)鐢紝鍥�?y脿n)娈″ó鏋帵瀚ｎ伇锜⒕濞忛部?hu矛)灏�(d菐o)鑷寸櫦(f膩)鐔卞毚(y谩n)閲�銆�
銆�銆�鍦�(2)鍙互閫氶亷浣跨敤鏇村皬鐨勯浕闃讳締(l谩i)闄嶄綆閫欏��(g猫)鐔遍噺锛屼笉閬庡湪鍠浕婧愪緵闆绘ā寮忎笅锛屽鏁�(sh霉)閬�(y霉n)鏀鹃兘涓嶈兘鏈夋晥妾㈡脯(c猫)鍜岃几鍑烘帴杩戝湴鎴栬�匳cc鐨勯浕澹�锛屽洜姝ゅ繀闋堜娇鐢ㄧ壒娈婄殑鍣ㄤ欢鎵嶈兘閬�(d谩)鍒拌姹傘�傛湁鍊�(g猫)绨�(ji菐n)鍠殑杈︽硶鏄�氶亷涓�鍊�(g猫)绌�(w臎n)澹撳櫒浠讹紙绌�(w臎n)澹撶锛屾垨鑰匱L431绛夛級鍋忕疆闆婚樆涓婇潰鐨勯浕澹擄紝浣垮緱閫欏��(g猫)闆诲閫�(j矛n)鍏ラ亱(y霉n)鏀剧殑妾㈡脯(c猫)鑼冨湇銆�
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銆�銆�8.鑳藉閫�(j矛n)琛岄浕娴佸弽楗嬬殑鍣ㄤ欢锛岄倓鏈夐浕娴佷簰鎰熷櫒锛屾垨鑰呭埄鐢ㄩ湇鐖惧厓浠跺皪(du矛)闆绘祦鍥炶矾涓婃煇浜涘櫒浠剁殑纾佸牬(ch菐ng)閫�(j矛n)琛屽弽楗�锛屼篃鍙互鍒╃敤鍥炶矾涓婄殑鐧�(f膩)鍏夊櫒浠讹紙渚嬪鍏夐浕鑰﹀悎鍣紝鐧�(f膩) 鍏夌绛夛級閫�(j矛n)琛屽弽楗�銆傞�欎簺鏂瑰紡閮借兘澶犳(g貌u)鎴愭湁鏁堢殑鎭掓祦婧愶紝鑰屼笖鏇撮仼鍚堝ぇ闆绘祦绛夌壒娈婂牬(ch菐ng)鍚�锛屼笉閬庡洜?y脿n)妾獲浜涘(sh铆)鐝�(xi脿n)褰㈠紡鐨勯浕璺兘姣旇純寰�(f霉)闆�锛岄�欓噷灏变笉涓�涓�浠嬬垂浜�銆�
