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褰撴垜妫€鏌ュ勾杞诲伐绋嬪笀鐨勫師鐞嗗浘鎴?pcb 甯冨眬鏃讹紝鎴戦兘瑕佹寫閫夊嚑涓儴浣嶉棶浠栦滑“涓轰粈涔堬紵”涓轰粈涔堜綘閫夋嫨杩欎釜缁勪欢锛熶负浠€涔堟妸瀹冨竷缃湪 pcb 鐨勮繖涓綅缃紵涔嬫墍浠ラ棶杩欎簺闂鏄洜涓哄伐绋嬪笀鍦ㄥ仛鍑烘瘡涓璁″喅绛栨椂閮藉簲璇ユ湁鍚堢悊鐨勭悊鐢便€?/div>
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鍥?1锛氬湪鍙嶉璺緞涓寘鍚數闃诲櫒鐨勮繍绠楁斁澶у櫒缂撳啿鍣ㄧ數璺?/div>
鐜板疄鎯呭喌鏄伐绋嬪笀缁忓父涓嶇煡閬撹嚜宸变负浠€涔堜娇鐢ㄧ數闃诲櫒 r2銆備粬浠彲鑳藉湪浠ュ墠鐨勫師鐞嗗浘涓湅鍒拌繃锛岃寰楀繀椤诲寘鍚畠銆傝繖浜涚數闃诲櫒閫氬父鐢ㄤ簬浣庨€熷簲鐢?(<50 mhz)锛屼互娑堥櫎杩愮畻鏀惧ぇ鍣ㄨ緭鍏ュ亸缃數娴佷骇鐢熺殑 dc 澶辫皟銆備絾鏄紝姝ｅ鎴戠幇鍦ㄥ凡閫€浼戠殑鍚屼簨 bruce trump 鎵€鎸囧嚭鐨勯偅鏍凤紝杩欏緢灏戝鏁堛€?/div>
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r2 涓庤緭鍏ュ叡妯＄數瀹?ccm2 鍙婅緭鍏ュ樊鍒嗙數瀹?cdm 鍦ㄥ弽鐩歌緭鍏ョ鏋勬垚涓€涓綆閫氭护娉㈠櫒銆傚弽棣堣矾寰勪腑鐨勪綆閫氭护娉㈠櫒鍦ㄦ斁澶у櫒鐨勫櫔澹板鐩婃洸绾?(1/β) 涓婁骇鐢熶竴涓浂锛屾墍澶勯鐜囦负锛?/div>
濡傛灉璇ラ浂杩滆繙楂樹簬鏀惧ぇ鍣ㄧ殑鍗曚綅澧炵泭甯﹀锛屽鍥?3 涓?fz(2) 鎵€绀猴紝瀹冨氨涓嶄細褰卞搷鐢佃矾鐨勭ǔ瀹氭€с€備絾濡傛灉杩欎釜闆跺浜庢垨浣庝簬杩愮畻鏀惧ぇ鍣ㄧ殑鍗曚綅澧炵泭甯﹀浣嶇疆锛屼緥濡?fz(1)锛屽櫔澹板鐩婃洸绾垮氨浼氫互澶т簬姣忓崄鍊嶉绋?20db 鐨勯€熺巼涓庡紑鐜鐩婃洸绾跨浉浜わ紝琛ㄦ槑鍙兘涓嶇ǔ瀹氥€?/div>
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璇ラ浂鐨勭浉绉诲湪浣庝簬 fz 鐨勫崄鍊嶉浣嶇疆寮€濮嬶紝鍥犳淇濆畧璁捐鍘熷垯鏄細
鐢ㄨ鍏紡鏇挎崲 fz锛屾垜浠究鍙‘瀹氳兘纭繚绋冲畾鎬х殑 r2 鏈€澶у€硷細
涓轰簡灞曠ず璇ユ晥鏋滐紝鎴戝閲囩敤缂撳啿鍣ㄩ厤缃殑 opa172 杩涜浜嗕豢鐪燂紝骞舵祴閲忎簡涓嶅悓 r2 鍊肩殑鐩镐綅瑁曞害銆侽pa172 鐨勫崟浣嶅鐩婂甫瀹芥槸 10mhz锛岃緭鍏ュ叡妯′笌宸垎鐢靛鍧囦负 4pf銆備娇鐢ㄥ叕寮?4 涓殑璁捐鍑嗗垯锛孯2 鐨勬渶澶у€兼槸锛?/div>
鍥?4 鏄垜鐢ㄦ潵娴嬮噺鐩镐綅瑁曞害鐨?tina-ti™ 浠跨湡鍘熺悊鍥俱€傚弽棣堢幆璺湪杩愮畻鏀惧ぇ鍣ㄨ緭鍑虹鐢辩數鎰熷櫒 l1 鎹熷潖锛屼竴涓數婧?(vg1) ac 鑰﹀悎鑷宠鍙嶉鐜矾銆傜幆璺鐩婄敱鍏锋湁“lg”鏍囪瘑鐨勬帰閽堟彁渚涳紝鍦ㄧ幆璺鐩婄瓑浜?0db 鏃讹紝鍙祴閲忕浉浣嶈搴︺€?/div>
缂撳啿鍣ㄥ弽棣堣矾寰勪腑鐨勭數闃诲櫒锛氶棶闂负浠€涔堬紒
鍥?4锛氭寜缂撳啿鍣ㄩ厤缃殑 opa172 鐨?tina-ti™ 浠跨湡鍘熺悊鍥?/div>
鍥?5 鏄湪 r2 鍊煎鍔犳椂鐩镐綅瑁曞害鐨勬洸绾裤€傝摑绾挎槸鎴戜滑鐢ㄥ叕寮?5 璁＄畻鍑虹殑 r2 鏈€澶у€笺€傚湪浣庝簬璇ラ檺鍊兼椂锛岀浉浣嶈搴︾殑闄嶄綆鏈€灏忥紝鍦?r2 = 200 娆у鏃朵粎闄嶈嚦 62°锛岃€岄珮浜庤闄愬€兼椂锛岀浉浣嶈搴﹀垯浼氬揩閫熼檷浣庛€?/div>
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鍥?5锛歄pa172 鐩镐綅瑁曞害鍙?r2 鍊肩殑姣旇緝鏇茬嚎
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鍦ㄦ煇浜涚數璺腑鍙兘浼氭湁鎻愪緵 r2 鐨勯€傚綋鐞嗙敱锛屼絾鍦ㄥ皢鍏剁撼鍏ュ師鐞嗗浘涔嬪墠锛岃闂棶鑷繁锛屼娇鐢ㄨ鐢甸樆鍣ㄨ杈惧埌浠€涔堟晥鏋溿€傚鏋滄墍闇€鐨勫€煎緢澶э紝鎮ㄥ彲鑳戒細閬囧埌绋冲畾鎬ч棶棰樸€傚湪浠讳綍宸ョ▼璁捐宸ヤ綔涓闂?ldquo;涓轰粈涔?rdquo;锛屽宸ョ▼甯堣嚜鎴戞彁楂橀潪甯搁噸瑕侊紒