
dasha anchu

electronic amplifierlalo, faze margine (pm) anedi faze logg (<0) mariyu-180° madhya vyatyaasam, sunna db geyin-i vadda amplifier yokka avtput signal (daani inputku sambandhinchi) kosam.ii. unity geyin, ledhaa avtput signal input vale adhe amplitude kaligi untundi.
udaaharanaku, dasha jaapyam-135° unna frequency vadda amplifier yokka open-loop geyin 0 dibini daatithe, appudu eee feedback system yokka dasha margine-135°-(-180°) = 45° avutundi. marinni vivaraala kosam boad plot#gain margine mariyu faze margine chudandi.
siddhaantam.
saadhaaranamgaa open-loop faze logg (inputku sambandhinchi, <0) frequencini batti maarutuu untundi, kramamga 180°nii minchipotundi, eee frequency vadda avtput signal vilomamavutundi ledhaa inputku sambandhinchi antiface avutundi. pm sanukoolamgaa untundi conny inversion sett ayye frequency kante takkuva frequenciela vadda taggutundi (idhi pm = 0), mariyu pm adhika frequenciela vadda pratikuulamgaa (pm <0) untundi. pratikuula pratispandana samakshamlo, loop geyin aikyatanu minchina frequency vadda sunna ledhaa pratikuula pm asthirataku haamii istundi (1). anduvalla saanukuula pm anedi circuit yokka saraina (naan-ausilatory) operationku bharosa ichhe "bhadrata margine". idhi amplifier circuitlaku alaage marinta saadhaaranamgaa, kriyaaseela filterlaku, vividha load paristhitulalo (udhaa.zii. reactive lodlu). daani saralamaina roopamlo, praticharya kaani feedback thoo aadarsha pratikuula feedback "voltage" amplifierlanu kaligi untundi, dasha margine amplifier yokka open-loop voltage geyin kaavalasina closed-loop disi voltage geyinku samaanamaina frequency vadda kolustaaru.
marinta saadhaaranamgaa, pm anedi amplifier mariyu daani feedback network kalayikaga nirvachinchabadindi ("loop", saadhaaranamgaa amplifier input vadda teravabadutundi), loop geyin unityga unna frequency vadda kolustaaru, mariyu loop moosivese mundu, open loop yokka avutputnu input muulaaniki kattadam dwara, daani nundi teesivese vidhamgaa.
paie loop-geyin nirvachanamlo, amplifier input sunna lodnu andistundani bhaavinchabadutundi. sunna kaani load input kosam eee pani cheyadaaniki, loop geyin yokka frequency pratispandananu nirnayinche uddesyamto feedback network yokka avutputnu samaanamaina lodtho load cheyali.
idhi labham yokka graph verses anie kooda bhaavinchabadutundi. frequency pratikuula vaalu thoo aikyata labhanni daatindi mariyu okasari matrame chestundi. kriyaaseela filterla vishayamlo maadirigaane, reactive mariyu kriyaaseela feedback networkla vishayamlo matrame eee pariseelana mukhyam.
faze margine mariyu daani mukhyamaina sahachara bhavana, geyin margine, closed-loop, dynamic-controll systemlalo sthirathvam yokka kolatalu. dasha margine saapeksha sthirathvaanni suuchistumdi, idhi dasha function vanti input maarpuku daani tadisina pratispandana samayamlo oogisalaadatam. geyin margine anedi sampoorna sthirathvaanni mariyu etuvanti bhangam kaliginchinatlayithe, parimiti lekunda vyavastha entha varaku oogisalaadutundo suuchistumdi.
anni amplifierla avtput signals vaati input signals thoo polchinappudu samayam alasyam pradarsistaayi. eee alasyam amplifier yokka input mariyu avtput sankethaala madhya dasha vyatyaasaanni kaligistundi. amplifierlo taginanta dasalu unte, kontha frequency vadda, avtput signal aaa frequency vadda input signal kante oka saikil vyavadhilo venukabadi untundi. eee paristhitiloo, amplifier yokka avtput signal daani input signaltho dasalo untundi, ayithe 360°, i venukabadi untundi.ii.avtput − 360° faze angle kaligi untundi. feedbacknu upayoginche amplifierlalo eee logg goppa paryavasanamga untundi. kaaranamh feed-byaak avtput signal input signaltho dasalo unte, daani open-loop voltage geyin daani closed-loop voltage geyinku samanam mariyu open-loop voltage geyin okati ledhaa anthakante ekkuva unna frequency vadda amplifier dolananiki lonavutundi. dolanalu jarugutaayi endukante phed-byaak avtput signal aaa frequency vadda input signalnu balopetam chestundi. sampradaaya kaaryaacharana amplifierlalo, klishtamaina avtput faze konam −180° avutundi, endukante avtput inverting input dwara inputku tirigi ivvabadutundi, idhi adanapu −180° nii jodistundi.
sadhana.
aacharanalo, feedback amplifierlu faze maarjinlatoe gananeeyamgaa 0° kante ekkuvagaa roopondinchabadaali, ayithe faze maarjinlatoe amplifierlu, 1° siddhaantaparamgaa sthiramgaa untaayi. kaaranam emitante, aneka aacharanaatmaka karakalu saiddhaantika kaneesa sthaayi kante takkuva dasha marjinnu tagginchagalavu. amplifier yokka avtput capacitive lodku anusandhaaninchabadinappudu oka pradhana udaaharana. anduvalla, operational amplifierlu saadhaaranamgaa 45° ledhaa anthakante takkuva kaneesa faze margine saadhinchadaaniki bharti cheyabadataayi. antey open mariyu closed loop gains kalise frequency vadda, faze angle − 135° untundi. lekkimpu-135°-(-180°) = 45°. warwick chudandi
ledhaa stout
taginanta faze maarjinlanu nirdhaarinchadaaniki parihara paddhatulu mariyu phalitaala vivaranaatmaka vislaeshanha kosam. pole splitting" anae vyaasam kooda chudandi. tarachugaa amplifierlu 60 degreela saadhaarana faze marjinnu saadhinchadaaniki roopondinchabaddaayi. saadhaarana dasha margine 60 degreela chuttoo unte, appudu kaneesa dasha margine saadhaaranamgaa 45 degreela kante ekkuvagaa untundi. 60 degreela faze margine kooda oka magic number endukante idhi voltage step input (butterworth design) nuu anusarinchadaaniki prayatnistunnappudu vegavantamaina settlement samayanni anumatistundi. takkuva faze margine unna amplifier ekkuva kaalam ring avutundi mariyu ekkuva faze margine unna amplifier voltage dasha yokka tudi sthaayiki peragadaaniki ekkuva samayam padutundi.

