鐩告晱妾㈡尝闆昏矾锛圥hase-Locked Loop, PLL锛夋槸涓�绋父鐢ㄧ殑鎺у埗绯荤当(t菕ng)锛屼富瑕佺敤浜庡悓姝ュ拰瑙ｈ(di脿o)淇¤櫉銆傚畠鍙互杩借工杓稿叆淇¤櫉鐨勭浉浣嶈畩鍖栧苟鐢�(ch菐n)鐢熻几鍑�锛屽父瑕嬩簬閫氫俊銆侀煶闋昏檿鐞�銆佸皠闋荤瓑闋�(l菒ng)鍩�銆侾LL鍏锋湁绌�(w臎n)瀹氭�у挤銆佹姉骞叉摼鑳藉姏濂藉拰闊挎噳閫熷害蹇瓑鍎�(y艒u)榛烇紝琚唬娉涙噳鐢ㄤ簬鐝�(xi脿n)浠ｉ浕瀛愯ō(sh猫)鍌�銆�
鐩告晱妾㈡尝闆昏矾鐢变笁鍊嬩富瑕侀儴鍒嗙祫鎴愶細鐩告瘮杓冨櫒锛圥hase Comparator锛夈�佺挵(hu谩n)璺烤娉㈠櫒锛圠oop Filter锛夊拰鎸暕鍣紙VCO锛孷oltage-Controlled Oscillator锛夈�傞�欎笁閮ㄥ垎鍏卞悓浣滅敤锛屽鐝�(xi脿n)灏嶈几鍏ヤ俊铏熺浉浣嶇殑璺熻工鍜岄帠瀹氥��
銆�銆�1. 鐩告瘮杓冨櫒
銆�銆�鍔熻兘锛氱浉姣旇純鍣ㄧ敤浜庢瘮杓冭几鍏ヤ俊铏熷拰鍙嶉淇¤櫉涔嬮枔鐨勭浉浣嶅樊锛屽苟鐢�(ch菐n)鐢熻宸俊铏�銆�
銆�銆�宸ヤ綔鍘熺悊锛氱暥杓稿叆淇¤櫉鑸囧弽楗嬩俊铏熶笉鍚屾鏅傦紝鐩告瘮杓冨櫒鏈冭几鍑鸿宸俊铏�锛屾寚绀虹浉浣嶅樊鐣�锛岄﹨(q奴)鍕曞悗绾�(x霉)鐠�(hu谩n)璺(di脿o)绡�(ji茅)銆�
銆�銆�2. 鐠�(hu谩n)璺烤娉㈠櫒
銆�銆�鍔熻兘锛氱挵(hu谩n)璺烤娉㈠櫒鐢ㄤ簬骞虫粦瑾ゅ樊淇¤櫉锛屼互纰轰繚绯荤当(t菕ng)绌�(w臎n)瀹氭�у拰娓涘皯闇囪暕銆�
銆�銆�宸ヤ綔鍘熺悊锛氱挵(hu谩n)璺烤娉㈠櫒閫氶亷婵鹃櫎楂橀牷鍣伈鍜岃(di脿o)鏁寸挵(hu谩n)璺熆鎳夌壒鎬т締鎻愪緵绌�(w臎n)瀹氱殑鍙冭�冧俊铏�锛岀敤浜庢帶鍒舵尟钑╁櫒銆�
銆�銆�3. 鎸暕鍣� (VCO)
銆�銆�鍔熻兘锛氭尟钑╁櫒鏄熀浜庤几鍏ユ帶鍒堕浕澹撲締瑾�(di脿o)鏁磋几鍑洪牷鐜囩殑鍏冧欢锛岃鐢ㄤ簬鐢�(ch菐n)鐢熼牷鐜囧彲瑾�(di脿o)鐨勬檪閻樹俊铏�銆�
銆�銆�宸ヤ綔鍘熺悊锛氳几鍏ヨ宸俊铏熺稉(j墨ng)閬庣挵(hu谩n)璺烤娉㈠櫒瑾�(di脿o)绡�(ji茅)鍚�锛屼綔鐐烘尟钑╁櫒鐨勬帶鍒堕浕澹�锛屽奖闊挎尟钑╁櫒杓稿嚭闋荤巼锛屼娇鍏惰垏杓稿叆淇¤櫉鍚屾銆�
1. 鎹曠嵅鑼冨湇锛氱浉鏁忔娉㈤浕璺殑鎹曠嵅鑼冨湇鏄寚鑳藉鑷嫊鎹曠嵅骞堕帠瀹氳几鍏ヤ俊铏熼牷鐜囪寖鍦嶇殑鑳藉姏銆傜暥杓稿叆淇¤櫉鍦ㄦ崟鐛茶寖鍦嶅収(n猫i)鏅傦紝PLL鑳藉杩呴�熻窡韫や俊铏熷苟瀵︾従(xi脿n)閹栧畾銆�
銆�銆�2. 杩借工鑼冨湇锛氳拷韫よ寖鍦嶆槸鎸嘝LL鍦ㄨ几鍏ヤ俊铏熼牷鐜囩櫦(f膩)鐢熻純澶ф敼璁婃檪锛屼粛鑳戒繚鎸侀帠瀹氱殑鑼冨湇銆侾LL闇�瑕佸叿鍌欒冻澶犲ぇ鐨勮拷韫よ寖鍦嶄締鎳夊皪闋荤巼璁婂寲锛屼繚鎸侀帠瀹氱媭鎱�(t脿i)銆�
銆�銆�3. 澶遍帠妾㈡脯锛氬け閹栨娓姛鑳界敤浜庣洠(ji膩n)娓琍LL鏄惁澶卞幓閹栧畾鐙�鎱�(t脿i)銆傜暥杓稿叆淇¤櫉瓒呭嚭PLL鐨勬崟鐛叉垨杩借工鑼冨湇鏅�锛屽け閹栨娓渻瑙哥櫦(f膩)璀﹀牨鎴栭噰鍙栫浉鎳夋帾鏂�銆�
1. 閫氳▕绯荤当(t菕ng)锛氬湪瑾�(di脿o)鍒惰В瑾�(di脿o)鍣�銆佹暩(sh霉)瀛楅�氫俊銆佸皠闋绘帴鏀舵绛夐�氳▕绯荤当(t菕ng)涓�锛孭LL鐢ㄤ簬鏅傞悩鎭㈠京銆侀牷鐜囧悎鎴愩�侀牷鍋忔牎姝ｇ瓑闂�(gu膩n)閸典换鍕�銆�
銆�銆�2. 闊抽牷瑷�(sh猫)鍌欙細鍦ㄦ暩(sh霉)瀛楅煶闋荤郴绲�(t菕ng)銆佺劇绶氶亥鍏嬮ⅷ銆侀煶闋诲悎鎴愬櫒绛夐煶闋昏ō(sh猫)鍌欎腑锛孭LL鐢ㄤ簬鍚屾淇¤櫉銆佹秷闄ゆ姈鍕曞拰纰轰繚闊抽牷璩�(zh矛)閲忋��
銆�銆�3. 瑕栭牷铏曠悊锛氬湪鏁�(sh霉)瀛楄闋昏檿鐞嗗櫒銆佹敐鍍忛牠鍜岄’绀鸿ō(sh猫)鍌欎腑锛孭LL琚敤浜庡悓姝ヨ闋讳俊铏熴�佹帶鍒剁暙闈㈢┅(w臎n)瀹氭�у拰鎻愰珮鍦栧儚璩�(zh矛)閲�銆�
銆�銆�4. 闋荤巼鍚堟垚锛歅LL鍦ㄩ牷鐜囧悎鎴愬櫒鍜屾檪閻樼櫦(f膩)鐢熷櫒涓唬娉涙噳鐢�锛岀敤浜庣敓鎴愮┅(w臎n)瀹氱殑鏅傞悩淇¤櫉鍜屽彲瑾�(di脿o)闋荤巼淇¤櫉锛屾豢瓒冲悇绋郴绲�(t菕ng)瑕佹眰銆�
銆�銆�5. 灏勯牷鎺ユ敹锛氬湪灏勯牷鎺ユ敹姗�銆佽(w猫i)鏄熼�氫俊銆侀浄閬旂郴绲�(t菕ng)涓�锛孭LL鐢ㄤ簬瑾�(di脿o)闋昏В瑾�(di脿o)銆佷綆鍣伈鏀惧ぇ鍣ㄦ帶鍒跺拰闋荤巼鍚屾绛夐棞(gu膩n)閸靛姛鑳�銆�
銆�銆�鐩告晱妾㈡尝闆昏矾浣滅偤涓�绋噸瑕佺殑鎺у埗绯荤当(t菕ng)锛屽湪鐝�(xi脿n)浠ｉ浕瀛愰牁(l菒ng)鍩熸湁钁楀唬娉涚殑鎳夌敤銆傚叾閫氶亷鐩告瘮杓冨櫒銆佺挵(hu谩n)璺烤娉㈠櫒鍜屾尟钑╁櫒涓夐儴鍒嗗崝(xi茅)鍚屽伐浣�锛屽鐝�(xi脿n)灏嶈几鍏ヤ俊铏熺浉浣嶇殑璺熻工鍜岄帠瀹�锛屼繚璀夌郴绲�(t菕ng)鐨勭┅(w臎n)瀹氭�у拰绮炬簴鎬с�備笉鍍呭湪閫氳▕銆侀煶闋汇�佽闋昏檿鐞嗙瓑闋�(l菒ng)鍩熷緱鍒板厖鍒嗘噳鐢�锛岄倓鍦ㄩ牷鐜囧悎鎴�銆佸皠闋绘帴鏀剁瓑闂�(gu膩n)閸电郴绲�(t菕ng)涓櫦(f膩)鎻憲閲嶈浣滅敤
