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鎮ㄥソ锛屾杩庝締鍒扮董搴浕瀛愬競鍫寸恫(w菐ng) 鐧婚寗 | 鍏嶈不(f猫i)娉ㄥ唺(c猫)

宸嫊(d貌ng)鏀惧ぇ鍣�
闁辫畝锛�28146鏅�(sh铆)闁擄細2011-03-07 18:29:34

銆�銆�宸嫊(d貌ng)鏀惧ぇ鍣�涔熷彨宸嫊(d貌ng)鏀惧ぇ鍣ㄦ槸涓�绋皣鍏╁��(g猫)杓稿叆绔浕澹撶殑宸互涓�鍥哄畾澧炵泭鏀惧ぇ鐨勯浕瀛愭斁澶у櫒锛屾湁鏅�(sh铆)绨＄ū鐐衡�滃樊鏀锯��銆傚樊鍕�(d貌ng)鏀惧ぇ鍣ㄩ�氬父琚敤浣�鍔熺巼鏀惧ぇ鍣�锛堢啊绋扁��鍔熸斁鈥濓級鍜岀櫦(f膩)灏勬サ鑰﹀悎閭忚集闆昏矾 (ECL, Emitter Coupled Logic) 鐨勮几鍏ョ礆(j铆)

鍘熺悊

銆�銆�濡傛灉Q1 Q2鐨勭壒鎬у緢鐩镐技锛屽墖Va,Vb灏囧悓妯ｈ畩鍖�銆備緥濡�锛孷a璁婂寲+1V锛孷b涔熻畩鍖�+1V锛屽洜?y脿n)妾╂暤椴Ψ绡UT=Va-Vb=0V,鍗砎a鐨勮畩鍖栬垏Vb鐨勮畩鍖栫浉浜掓姷娑�銆傞�欏氨鏄樊鍕�(d貌ng)鏀惧ぇ鍣ㄥ彲浠ヤ綔鐩存祦淇¤櫉(h脿o)鏀惧ぇ鐨勫師鍥犮��     鑻ュ樊鏀剧殑鍏╁��(g猫)杓稿叆鐐�锛屽墖瀹冪殑杓稿嚭Vout鐐猴細

                                                       

                                                                                               


銆�銆�鍏朵腑Ad鏄樊妯″鐩� (differential-mode gain)锛孉c浠�妯″鐩� (common-mode gain)銆�
銆�銆�鍥犳鐐轰簡鎻愰珮淇�/鍣瘮锛屾噳(y墨ng)鎻愰珮宸嫊(d貌ng)鏀惧ぇ鍊嶆暩(sh霉)锛岄檷浣庡叡妯℃斁澶у�嶆暩(sh霉)銆備簩鑰呬箣姣旂ū鍋氬叡妯′话鍒舵瘮锛圕MRR, common-mode rejection ratio锛�銆傚叡妯℃斁澶у�嶆暩(sh霉)AC鍙敤涓嬪紡姹傚嚭锛�
銆�銆�                 Ac=2Rl/2Re
銆�銆�閫氬父浠ュ樊妯″鐩婂拰鍏辨ā澧炵泭鐨勬瘮鍊煎叡妯℃姂鍒舵瘮 (CMRR, common-mode rejection ratio) 琛￠噺宸垎鏀惧ぇ鍣ㄦ秷闄ゅ叡妯′俊铏�(h脿o)鐨勮兘鍔涳細

                      
銆�銆�鐢变笂寮忓彲鐭ワ紝鐣�(d膩ng)鍏辨ā澧炵泭Ac鈫�0鏅�(sh铆)锛孋MRR鈫掆垶銆俁e瓒婂ぇ锛孉c灏辫秺浣�锛屽洜姝ゅ叡妯℃姂鍒舵瘮涔熷氨瓒婂ぇ銆傚洜姝ゅ皪(du矛)浜庡畬鍏ㄥ皪(du矛)绋辩殑宸垎鏀惧ぇ鍣ㄤ締瑾�锛屽叾Ac = 0锛屾晠杓稿嚭闆诲鍙互琛ㄧず鐐猴細

                    
銆�銆�鎵�璎傚叡妯℃斁澶у�嶆暩(sh霉)锛屽氨鏄疺a锛孷b杓稿叆鐩稿悓淇¤櫉(h脿o)鏅�(sh铆)鐨勬斁澶у�嶆暩(sh霉)銆傚鏋滃叡妯℃斁澶у�嶆暩(sh霉)鐐�0锛屽墖杓稿叆鍣伈灏�(du矛)杓稿嚭娌掓湁褰遍熆銆�
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鐗规��

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涓昏鎬ц兘鎸囨(bi膩o)鍜屽劒(y艒u)榛�(di菐n)

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宸叉敹閷勮姊�162542鍊�(g猫)