銆�銆�鍜牠鐨勬脯(c猫)瑭︽浠�;MIC鐨勪娇鐢ㄦ噳(y墨ng)瑕�(gu墨)瀹氬叾宸ヤ綔闆诲鍜岃矤(f霉)杓夐浕闃�,涓嶅悓鐨勪娇鐢ㄦ浠�,鍏堕潏鏁忓害鐨勫ぇ灏忔湁寰堝ぇ鐨勫奖闊�
銆�銆�闆诲 闆婚樆
銆�銆�1銆佹秷鑰楅浕娴侊細鍗冲挭闋殑宸ヤ綔闆绘祦
銆�銆�涓昏鏄疐ET鍦╒SG=0鏅�(sh铆)鐨勯浕娴�锛屾牴鎿�(j霉)FET鐨勫垎妾�锛屽彲浠ュ仛鎴愪笉鍚屽伐浣滈浕娴佺殑鍌宠伈鍣ㄣ�備絾鏄皪(du矛)浜庡伐浣滈浕澹撲綆銆佽矤(f霉)杓夐浕闃诲ぇ鐨勬儏娉佷笅锛屽皪(du矛)浜庡伐浣滈浕娴佸氨鏈夊毚(y谩n)鏍肩殑瑕佹眰锛岀敱闆诲師鐞嗗湒鍙煡
銆�銆�VS=VSD+ID脳RL ID = (VS- VSD)/ RL
銆�銆�寮忎腑 ID FET 鍦╒SG绛変簬闆舵檪(sh铆)鐨勯浕娴�
銆�銆�RL鐐鸿矤(f霉)杓夐浕闃�
銆�銆�VSD,鍗矲ET鐨凷鑸嘍涔嬮枔鐨勯浕澹撻檷
銆�銆�VS鐐烘(bi膩o)婧�(zh菙n)宸ヤ綔闆诲
銆�銆�绺界殑瑕佹眰 100渭A銆圛DS銆�500渭A
銆�銆�2銆侀潏鏁忓害锛�?ji菐n)鎸濆鏅х碍?qi谩ng)涓嬫墍鑳界敘(ch菐n)鐢熼浕澹撳ぇ灏忕殑鑳藉姏銆�
銆�銆�鍠綅锛歏/Pa 鎴� dBV/Pa 鏈夌殑鍏徃浣跨敤鏄痙BV/渭Bar
銆�銆�-40 dBV/Pa=-60dBV/渭Bar
銆�銆�0 dBV/Pa=1V/Pa
銆�銆�鑱插寮�(qi谩ng)Pa=1N/m2
銆�銆�3銆佽几鍑洪樆鎶楋細鍩烘湰鐩哥暥(d膩ng)浜庤矤(f霉)杓夐浕闃籖L(1-70%)涔嬮枔銆�
銆�銆�4銆佹柟鍚戞�у強闋婚熆鐗规�ф洸绶氾細
銆�銆�a銆佸叏鍚�: MIC鐨勯潏鏁忓害鏄湪鐩稿悓鐨勮窛闆笅鍦ㄤ换浣曟柟鍚戜笂鐩哥瓑锛屽叏鍚慚IC鐨勭祼(ji茅)妲�(g貌u)鏄疨CB涓婂叏閮ㄥ瘑灏�,鍥犳,鑱插鍙湁寰濵IC鐨勯煶瀛旈��(j矛n)鍏�锛屽洜姝ゆ槸灞簬澹撳挤(qi谩ng)鍨嬪偝鑱插櫒銆�
銆�銆�闋荤巼鐗规�у湒锛�
銆�銆�b銆佸柈鍚� 鍠悜MIC 鍏锋湁鏂瑰悜鎬�锛屽鏋淢IC鐨勯煶瀛旀灏�(du矛)鑱叉簮鏅�(sh铆)鐐�0搴︼紝閭ｄ箞鍦�0搴︽檪(sh铆)闈堟晱搴�锛�180搴︽檪(sh铆)闈堟晱搴�锛屽湪鍏ㄦ柟浣嶄笂鍛堝績鍨嬪湒锛屽柈鍚慚IC鐨勭祼(ji茅)妲�(g貌u)鑸囧叏鍚慚IC涓嶅悓锛屽畠鏄湪PCB涓婇枊(k膩i)鏈変竴浜涘瓟锛岃伈闊冲彲浠ュ緸闊冲瓟鍜孭CB鐨勯枊(k膩i)瀛旈��(j矛n)鍏ワ紝鑰屼笖MIC鐨勫収(n猫i)閮ㄩ倓瑁濇湁鍚搁煶鏉愭枡锛屽洜姝ゆ槸浠嬩簬澹撳挤(qi谩ng)鍜屽宸箣闁撶殑MIC銆�
銆�銆�闋荤巼鐗规�у湒锛�
銆�銆�c銆佹秷鍣瀷锛氭槸灞簬澹撳樊寮廙IC锛屽畠鑸囧柈鍚慚IC涓嶅悓涔嬭檿鍦ㄤ簬鍏�(n猫i)閮ㄦ矑(m茅i)鏈夊惛闊虫潗鏂�锛屽畠鐨勬柟鍚戝瀷鍦栨槸涓�鍊�(g猫)8瀛楀瀷
銆�銆�闋荤巼鐗规�э細
銆�銆�5銆侀牷鐜囪寖鍦嶏細
銆�銆�鍏ㄥ悜锛� 50~12000Hz 20~16000Hz
銆�銆�鍠悜锛�100~12000Hz 100~16000Hz
銆�銆�娑堝櫔锛�100~10000Hz
銆�銆�6銆佽伈澹撶礆(j铆):鏄寚MIC鐨勫け鐪熷湪3%鏅�(sh铆)鐨勮伈澹撶礆(j铆),鑱插绱�(j铆)瀹氱京:20渭pa=0dBSPL
銆�銆�MaxSPL鐐�115dBSPLA SPL鑱插绱�(j铆) A鐐篈瑷�(j矛)娆�(qu谩n)
銆�銆�7銆丼/N淇″櫔姣旓細鍗矼IC鐨勯潏鏁忓害鑸囧湪鐩稿悓姊濅欢涓嬪偝鑱插櫒鏈韩鐨勫櫔鑱蹭箣姣旓紝瑭宠(ji脿n)鐢�(ch菐n)鍝佹墜鍐�(c猫)锛屽櫔鑱蹭富瑕佹槸FET鏈韩鐨勫櫔鑱�
