璁よ瘑鍑芥暟淇″彿鍙戠敓鍣?
鍙戣〃鏃墮棿錛?009-10-15
銆�銆� 鍑芥暟淇″彿鍙戠敓鍣?/A>涓�鑸尯鍒嗕負(fù)鍑芥暟淇″彿鍙戠敓鍣ㄥ強(qiáng)浠繪剰娉㈠艦鍙戠敓鍣紝鑰屽嚱鏁版嘗褰㈠彂鐢熷櫒鍦ㄨ璁′笂鍙堝尯鍒嗗嚭妯℃嫙鍙?qiáng)鏁板瓧鍚堟垚寮忋�備紬鎵�鍛ㄧ煡錛屾暟瀛楀悎鎴愬紡鍑芥暟淇″彿婧愭棤璁哄氨棰戠巼銆佸箙搴︿箖鑷充俊鍙風(fēng)殑淇″櫔姣旓紙S/N錛夊潎浼樹簬妯℃嫙錛屽叾閿佺浉鐜紙 PLL錛夌殑璁捐璁╄緭鍑轟俊鍙蜂笉浠呮槸棰戠巼綺懼噯錛岃�屼笖鐩鎬綅鎶栧姩(phase Jitter)鍙?qiáng)棰戠巼婕偪U誨潎鑳借揪鍒扮浉褰撶ǔ瀹氱殑鐘舵�侊紝浣嗘瘯绔熸槸鏁板瓧寮忎俊鍙鋒簮錛屾暟瀛楃數(shù)璺笌妯℃嫙鐢?shù)璧\涔嬮棿鐨勫共鎵幫紝濮嬬粓闅句互鏈夋晥鍏嬫湇錛屼篃閫犳垚鍦ㄥ皬淇″彿鐨勮緭鍑轟笂涓嶅妯℃嫙寮忕殑鍑芥暟淇″彿鍙?
榪欐槸閫氱敤妯℃嫙寮忓嚱鏁頒俊鍙峰彂鐢熷櫒鐨勭粨鏋勶紝鏄互涓夎娉駭鐢熺數(shù)璺負(fù)鍩虹緇忎簩鏋佺鎵�鏋勬垚鐨勬寮︽嘗鏁村瀷鐢?shù)璧\浜х敓姝ｅ雞娉紝鍚屾椂緇忕敱姣旇緝鍣ㄧ殑姣旇緝浜х敓鏂規(guī)嘗,鎹㈠彞璇濊錛屽鏋滀互鎭掓祦婧愬鐢?shù)瀹瑰厖鐢?shù)錛屽嵆鍙駭鐢熸鏂滅巼鐨勬枩娉?SPAN class=style5>鎸姩嫻嬮噺浠?/A>銆傚悓鐞嗭紝鍙充互鎭掓祦婧愬皢鍌ㄥ瓨鍦ㄧ數(shù)瀹逛笂鐨勭數(shù)鑽鋒斁鐢?shù)鍗充骇鐢熻礋鏂滅巼鐨勬枩鎳L錛岀數(shù)璺粨鏋勫涓嬶細(xì)
褰揑1 =I2鏃訛紝鍗沖彲浜х敓瀵圭О鐨勪笁瑙掓嘗錛屽鏋淚1 > >I2錛屾鏃跺嵆浜х敓璐熸枩鐜囩殑閿嬌娉紝鍚岀悊I1 < < I2鍗充駭鐢熸鏂滅巼閿嬌娉€�?
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銆�銆� 鑰屽湪鍗犵┖姣旇皟鏁翠笂鐨勮璁℃湁涓嬪垪涓ょ鎬濊礬錛?
鏀瑰彉鐢?shù)邈^鐨勫箙搴︼紝浜﹀嵆鏀瑰彉鏂規(guī)嘗浜х敓鐢?shù)璧\姣旇緝鍣ㄧ殑鍙傝�冨箙搴︼紝鍗沖彲杈懼埌鏀瑰彉鑴夊鑰岄鐜囦笉鍙樼殑鐗規(guī)�э紝浣嗗叾鏈�涓昏鐨勭己鐐規(guī)槸鍗犵┖姣斾竴鑸棤娉曡皟鍒?0%浠ヤ笅錛屽鑷村湪閲囨牱鐢?shù)璧\瀹為獙鏃訛紝瀵圭灛鏃朵俊鍙鋒墍閲囬泦鍑烘潵鐨勪俊鍙鋒湁鎵�鍙樺姩錛屽鏋滆灝嗘淇″彿鐢ㄦ潵浣滄ā鏁幫紙A/D)杞崲錛岄偅涔堝緱鍒扮殑鏁板瓧淇″彿灝卞彂鐢熷彉鍔ㄨ�屾棤鎵�閫備粠銆備絾琛ㄩ潰寮犲姏嫻嬪畾浠?/A>?
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灝嗘柟娉駭鐢熺數(shù)璺瘮杈冨櫒鐨勫弬鑰冨箙搴︿簣浠ュ浐瀹氾紙姝ｃ�佽礋鍙埄鐢ㄧ數(shù)璺簣浠ュ垏鎹級錛屾敼鍙樺厖鏀劇數(shù)鏂滅巼錛屽嵆鍙揪鎴愩�?
銆�銆� 榪欑鏂瑰紡鐨勮璁′竴鑸嬌鐢ㄨ�呯殑鍙嶅簲鏄�滈毦璋冣�濓紝榪欐槸澶х己鐐癸紝浣嗗畠鍙互浜х敓10%浠ヤ笅鐨勫崰絀烘瘮鍗存槸鍦ㄩ噰鏍鋒椂鐨勫繀澶囨潯浠躲�?
銆�銆� 浠ヤ笂鐨勪袱縐嶅崰絀烘瘮璋冩暣鐢?shù)璧\璁捐鎬濊礬錛屽悇鏈変紭緙虹偣錛屽綋鐒惰繛甯︾殑涔熷獎鍝嶅埌鏄惁鑳戒駭鐢熲�滃儚鏍風(fēng)殑鈥濋敮榻挎嘗銆?
銆�銆� 鎺ヤ笅鏉A錛堝姛鐜囨斁澶у櫒錛夌殑璁捐銆傞鍏堟槸鍒╃敤榪愮畻鏀懼ぇ鍣紙OP) 錛屽啀鍒╃敤鎺ㄦ媺寮?push-pull)鏀懼ぇ鍣紙娉ㄦ剰浜よ秺澶辯湡Cross-distortion鐨勯闃詫級灝嗕俊鍙烽�佸埌琛板噺緗戣礬錛岃繖閮ㄥ垎鐗墊秹鍒頒俊鍙鋒簮杈撳嚭淇″彿鐨勬寚鏍囷紝鍖呭惈淇″櫔姣斻�佹柟娉笂鍗囨椂闂村強(qiáng)淇″彿婧愮殑棰戠巼鍝嶅簲錛屽ソ鐨勪俊鍙鋒簮褰撶劧鏄寮︽嘗淇″櫔姣旈珮銆佹柟娉笂鍗囨椂闂村揩銆佷笁瑙掓嘗綰挎�у害瑕佸ソ銆佸悓鏃朵紡棰戠壒鎬т篃瑕佸ソ錛岋紙涔熷嵆棰戠巼涓婂崌錛屼俊鍙蜂笉鑳借“鍑忔垨涓嶈兘鍑忓お澶э級錛岃繖閮ㄥ垎鐢?shù)璧\杈冧負(fù)澶嶆潅錛屽挨鍏跺湪楂橀鏃墮櫎鍒╃敤鐢?shù)瀹逛綔棰戠巼琛ュ伩澶栧Q屼篃鐗墊秹鍒癙C鏉跨殑甯冪嚎鏂瑰紡錛屼竴涓嶅皬蹇冿紝鏋佹槗寮曡搗鎸崱錛屾兂璁捐榪欓儴鍒嗙數(shù)璺紝闄ゅ師鏈夌殑妯℃嫙鐞嗚鍩虹澶栧皻闇�鍏峰瀹為檯鐨勭粡楠岋紝鈥淭ry Error鈥濈殑鑰愬績鏄笉鍙己灝戠殑銆?
銆�銆� PA淇″彿鍑烘潵鍚庯紝緇忚繃蟺鍨嬬殑鐢?shù)闃诲紡琛板噺缃戣矾锛?span id="m3uzbas" class=style5>鍋忔尟鍏夋紨紺轟華鍒嗗埆琛板噺10鍊嶏紙20dB)鎴?00鍊嶏紙40dB),姝ゆ椂涓�閮ㄥ熀鏈殑鍑芥暟娉㈠艦鍙戠敓鍣ㄥ嵆宸插畬鎴愩�傦紙娉ㄦ剰錛氶�夌敤蟺鍨嬭“鍑忕綉緇滆�屼笉鏄垎鍘嬬數(shù)璺槸瑕佽杈撳嚭闃繪姉淇濇寔涓�瀹氾級銆?
銆�銆� 涓�鍙板姛鑳借緝寮虹殑鍑芥暟娉㈠艦鍙戠敓鍣紝榪樻湁鎵銆乂CG銆乀TL銆?TRIG銆?GATE鍙?qiáng)棰戠巼璁〗{夊姛鑳斤紝鍏惰璁℃柟寮忓湪姝や篃欏轟究涓�鎻愶細(xì)
銆�銆� 1. 鎵錛氫竴鑸垎鎴愮嚎鎬э紙Lin)鍙?qiáng)瀵规晭图圠og)鎵錛?
銆�銆� 2. VCG錛氬嵆涓�鑸殑FM錛岃緭鍏ヤ竴闊抽淇″彿錛屽嵆鍙笌淇″彿婧愭湰韜殑淇″彿浜х敓棰戠巼璋冨埗錛?
銆�銆� 涓婅堪涓ら」璁捐鏂瑰紡錛岀1欏硅鍏堜駭鐢熼敮榻挎嘗鍙?qiáng)瀵规暟鎳L淇″彿錛屽茍涓庣2欏圭殑杈撳叆淇″彿緇忚繃澶氳礬鍣紙Multiplexer)閫夋嫨錛岀劧鍚庡啀緇忚繃鐢?shù)鍘嬪鐢?shù)嫻佽漿鎹㈢數(shù)璺紝鍚屾鍦板幓鍔犲埌鍥句簩涓殑I1銆両2涓婏紱
銆�銆� 3. TTL鍚屾杈撳嚭錛氬皢鏂規(guī)嘗緇忎笁鏋佺鐢?shù)璧\杞垚0(Low)銆?V(High)鐨凾TL淇″彿鍗沖彲銆?
銆�銆� 浣嗘敞鎰忚繖鏍風(fēng)殑TTL淇″彿欏誨啀緇忚繃緙撳啿闂紙buffer)鍚庢墠鑳借緭鍑猴紝浠ュ鍔犳墖鍑烘暟錛團(tuán)an Out)錛岄�氬父鏈夋椂榪樺茍鑱斿嚑涓猙uffer銆傝�孴TL INV鍒欏彧瑕佸姞涓狽OT Gate鍗沖彲錛?
銆�銆� 4. TRIG鍔熻兘錛氱被浼糘ne Shot鍔熻兘錛岃緭鍏ヤ竴涓猅TL淇″彿錛屽垯鍙淇″彿婧愪駭鐢熶竴涓懆鏈熺殑淇″彿杈撳嚭錛岃璁℃柟寮忔槸鍦ㄦ病淇″彿杈撳叆鏃訛紝灝嗗浘浜岀殑SWI鎺ュ湴鍗沖彲錛?
銆�銆� 5. Gate鍔熻兘錛氬嵆杈撳叆涓�涓猅TL淇″彿錛岃淇″彿婧愬湪杈撳叆涓篐i鏃訛紝浜х敓娉㈠艦杈撳嚭錛岀洿鍒拌緭鍏ヤ負(fù)LOW鏃訛紝鍥句簩SWI鎺ュ湴鑰屽叧鎺変俊鍙鋒簮杈撳嚭錛?
銆�銆� 6. 鍏嗘琛ㄦ瀹氳緗?/A>錛氶櫎甯傚満涓婄畝鏄撶殑鍒誨害鐩樻樉紺轟箣澶栵紝鏃犺鏄疞ED鏁扮爜綆℃垨LCD娑叉櫠鏄劇ず棰戠巼錛屽叾涓庨鐜囪鐢?shù)璧\鏄噸鍙犵殑.
2. 浠繪剰娉㈠艦鍙戠敓鍣紝浠跨湡瀹為獙鐨勬渶浣充華鍣?
銆�銆� 浠繪剰娉㈠艦鍙戠敓鍣ㄦ槸淇″彿婧愮殑涓�縐嶏紝瀹冨叿鏈変俊鍙鋒簮鎵�鏈夌殑鐗圭偣銆傛垜浠紶緇熼兘璁や負(fù)淇″彿婧愪富瑕佺粰琚祴鐢?shù)璧\鎻愪緵鎵�闇�瑕佺殑宸茬煡淇″彿錛堝悇縐嶆嘗褰級錛岀劧鍚庣敤鍏跺畠浠〃嫻嬮噺鎰熷叴瓚ｇ殑鍙傛暟銆傚彲瑙佷俊鍙鋒簮鍦ㄧ數(shù)瀛愬疄楠屽拰嫻嬭瘯澶勭悊涓紝騫朵笉嫻嬮噺浠諱綍鍙傛暟鑰屾槸鏍規(guī)嵁浣跨敤鑰呯殑瑕佹眰錛屼豢鐪熷悇縐嶆祴璇曚俊鍙鳳紝鎻愪緵緇欒嫻嬬數(shù)璺紝浠ヨ揪鍒版祴璇曠殑闇�瑕併�?
銆�銆� 淇″彿婧愭湁寰堝縐嶏紝鍖呮嫭姝ｅ雞娉俊鍙鋒簮錛屽嚱鏁板彂鐢熷櫒銆佽剦鍐插彂鐢熷櫒銆佹壂鎻忓彂鐢熷櫒銆佷換鎰忔嘗褰㈠彂鐢熷櫒銆佸悎鎴愪俊鍙鋒簮絳夈�備竴鑸潵璁蹭換鎰忔嘗褰㈠彂鐢熷櫒錛屾槸涓�縐嶇壒孌婄殑淇″彿婧愶紝緇煎悎鍏鋒湁鍏跺畠淇″彿婧愭嘗褰㈢敓鎴愯兘鍔涳紝鍥犺�岄�傚悎鍚勭浠跨湡瀹為獙鐨勯渶瑕併�?
銆�銆� 涓�銆佸嚱鏁板姛鑳斤紝浠跨湡鍩虹瀹為獙瀹よ璁′漢鍛樼殑鐜
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