РефератыИнформатика, программированиеФаФазовая автоподстройка частоты

Фазовая автоподстройка частоты

1cw 3.15


U1STANDARD


U2BOLD__L


U3NORM__L


U5NORM_SL


U9MATH


U0DRAWSYM


U!SMALL_R


U"BOLD__R


U#NORM__R


U$ITAL__R


U)MATH_I


U*LINEDRAW


pPL 128


pPF 1


pTF 1


pRM 59


pLM 8


pTM 0


pBM 0


pPI 0


pJU 1


pHS 2


pDS 1


pEN 0


pSP 1


pTA 5 10 15 20 25 30 35 40 45 50 55 60 65 71 76


pPS 1


pTS 1


HD


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^ 1. #J,obt cdtltybz j, FGX3. ^,


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#Cbcntvs FGX utnthjlbyf ghbtvybrf ghbvtyz.n xfot


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dctuj lkz evtymitybz jnrkjytybq ghjvt;enjxyjq xfcnjns


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jn yjvbyfkmyjuj pyfxtybz3, #dspdfyys[ ytcnf,bkmyjcnm.


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xfcnjn gthtlfnxbrf b utnthjlbyf3. #Ghbvtytybt FGX


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bkb xfcnjnjq3, #d ltvjlekznjhf[ cbuyfkjd c XV b AV1, ,


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#b n3.#l3.,


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#Ghbywbg ltqcndbz FGX cjcnjbn d fdnjvfnbxtcrjv


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bpvthtybb jnrkjytybz ghjvt;enjxyjq xfcnjns ghbtvybrf jn


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yjvbyfkmyjuj pyfxtybz bkb xfcnjns gjlcnhfbdftvjuj


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utnthjlbyf jn ytrjnjhjuj j,hfpwjdjuj pyfxtybz b gjl-A


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cnhjqrt utnthjlbyf nfrbv j,hfpjv3, #xnj,s jnrkjytybt yt


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ghtdsifkj ytrjnjhjuj pyfxtybz3.,


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#Gj ghbywbge ltqcndbz bpvthbntkmyjuj 'ktvtynf


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hfpkbxf.n ldf dblf FGX3: #cbcntvs afpjdjq fdnjgjlcnhjqrb


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xfcnjns (AFGX) b xfcnjnyjq (XFGX)3. #D cbcntvf[ XFGX d


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rfxtcndt bpvthbntkmyjuj 'ktvtynf bcgjkmpetncz xfcnjnysq


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lbcrhbvbyfnjh3, #f d AFGX - afpjdsq3. #Cbcntvs AFGX3, #d


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jnkbxbt jn XFGX3, #ghb gjcnjzyyjv dytiytv djpltqcndbb3,


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#yt dyjczn jib,re htuekbhjdfybz gj xfcnjnt3. #Jlyfrj ghb


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'njv djpybrftn cnfnbxtcrfz jib,rf htuekbhjdfybz gj


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afpt3.,


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#D pfdbcbvjcnb jn [fhfrnthf hf,jns bpvthbntkmyjuj


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'ktvtynf cbcntvs FGX ltkzn yf cbcntvs ytghthsdyjuj b


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bvgekmcyjuj ltqcndbz3, #jceotcndkz.obt cjjndtncndtyyj


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ytghthsdyjt b lbcrhtnyjt ckt;tybt pf xfcnjnjq3.,


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#D rfxtcndt 'ktrnhjyys[ eghfdkz.ob[ 'ktvtynjd d


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cbcntvf[ FGX bcgjkmpe.n nhfypbcnjhs3, #dfhbrfgs3,


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#ytkbytqyst rjyltycfnjhs b bylernbdyjcnb3. #Rhjvt njuj


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byjulf bcgjkmpe.ncz 'ktrnhjvt[fybxtcrbt eghfdkz.obt


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'ktvtyns3, #rjnjhst bpvtyz.n xfcnjne utnthjlbyf gentv


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bpvtytybz gfhfvtnhjd tuj rjynehf c gjvjom. 'ktrnhj-A


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#Hfccvjnhbv ,jktt gjlhj,yj cbcntvs afpjdjq


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^ 12. #cbcntvs afpjdjq fdnjgjlcnhjqrb ^


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^ xfcnjns3. ^,


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12.1. #Cnhernehyfz c[tvf b ghbywbg ltqcndbz AFGX3.,


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#Cbcntvs AFGX vjuen dsgjkyznm hfpkbxyst aeyrwbb3.


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#Tckb gfhfvtnhs j,hfpwjdjuj cbuyfkf ytgjcnjzyys3, #bkb


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rjulf yf d[jl cbcntvs dvtcnt c gjktpysv cbuyfkjv


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gjgflftn fllbnbdyfz gjvt[f3, #cbcntvf AFGX dsgjkyztn


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hjkm eprjgjkjcyjuj abkmnhf3. #Cbcntve AFGX vj;yj nfr;t


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bcgjkmpjdfnm lkz gjcnhjtybz ytkbytqyjuj abkmnhf b


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ltvjlekznjhf cbuyfkjd c XV b AV3. #Jcyjdyjt yfpyfxtybt


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AFGX d hflbjghbtvys[ ecnhjqcndf[ - cnf,bkbpfwbz


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xfcnjns vtcnyjuj utnthjlbyf lkz jceotcndktybz njxyjq


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yfcnhjqrb ghbtvybrf3.,


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#Cbcntvs AFGX vj;yj hfpltkbnm yf cbcntvs


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f,cjk.nyjq b ghjvt;enjxyjq xfcnjn3. #D cbcntvt


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f,cjk.nyjq xfcnjns (hbc3.#13,#f) xfcnjnf utnthjlbyf d


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cnfnbxtcrjv ht;bvt njxyj hfdyf xfcnjnt cbuyfkf3. #D


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cbcntvt ghjvt;enjxyjq xfcnjns (hbc3.#13,#,) xfcnjnf


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utnthjlbyf jnkbxftncz jn xfcnjns cbuyfkf yf dtkbxbye


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ghjvt;enjxyjq xfcnjns3. #Ghb 'njv jgjhyfz xfcnjnf hfdyf


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yjvbyfkmyjve pyfxtyb. ghjvt;enjxyjq xfcnjns3.,


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^ #hbc&1& Cnhernehyst c[tvs AFGX& ^,


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Hfccvjnhbv ghbywbg ltqcndbz cbcntvs FGX^ d


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rjnjhjq d rfxtcndt abkmnhf bcgjkmpetncz 3RC #- abkmnh


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yb;yb[ xfcnjn& Bpvthbntkmysv 'ktvtynjv cbcntvs AFGX


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zdkztncz afpjdsq ltntrnjh (cv& hbc& 1)& Htuekbhe.ott


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yfghz;tybt 3U!h #dshf,fnsdftncz gentv chfdytybz afp rj-A


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Gjcrjkmre hfpyjcnm afp )D9v#(3t#) cdzpfyf c hfpyjcnm.


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xfcnjn )D9w#(3t#) pfdbcbvjcnm.,


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ktynyj drk.xtyb. byntuhbhe.otuj pdtyf& "nj j,tcgtxbdftn


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fcnfnbpv cbcntvs gj xfcnjnt^ n&t& hfdtycndj yek.


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ecnfyjdbditqcz jib,rb ghb gjcnjzyyjv dytiytv


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Eghfdktybt afpjq gjlcnhfbdftvjuj rjkt,fybz


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jceotcndkztncz c gjvjom. eghfdkz.otuj ecnhjqcndf (EE)-


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xfcnjnyjuj vjlekznjhf^ rjnjhsq bpvtyztn xfcnjne


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utythfwbb& Yf d[jl EE gjlftncz eghfdkz.ott yfghz;tybt


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3U!h #^ rjnjhjt cdzpfyj c yfghz;tybtv 3U!al #lbaathty-A


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wbfkmysv ehfdytybtv,


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#Ghb 'njv vs cxbnftv^ xnj ltntrnjhyfz [fhfrnt-A


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hbcnbrf AL zdkztncz aeyrwbtq dblf,


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^ 3U!al #= 3S!al#*9j#(9v#)^ ^(33#),


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ult 9j#(9v#) - d j,otv ckexft ytkbytqyfz aeyrwbz hfpyjcnb


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afp d[jlyjuj cbuyfkf b cbuyfkf utnthjlbyf&,


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Cxbnfz^ xnj htuekbhjdjxyfz [fhfrnthbcnbrf utnt-A


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hjlbyf jgbcsdftncz ehfdytybtv,


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^ 3f!u 3= f!uy 3- S!u3U!h 3+ )D3f!u#^ ^(34#),


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ult )D3f!u #- yfxfkmyfz hfccnhjqrf utnthjlbyf^ yfqltv


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htuekbhe.ott yfghz;tybt 3U!h3:,


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^ U!h 3= - *[----]3(9w!u 3- 9w!uy 3- )D9w!u3)#^ ^(35#),


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^ #ult 9w!u #= *[---]#& Njulf *[---] #= - *[----][--!2*-]#& ^(36#),


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ltntrnjh dshf,fnsdftn yfghz;tybt^ pfdbczott jn hfpyjcnb


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afp 9v!u #= 9v #+ 9v!c #+ 9v!g0 #(37#)^ ult 9v!g0 #- afpf cbuyfkf


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jgjhyjuj utythfnjhf GX (cv& hbc& 1^,)&,


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#Bnfr^ cjgjcnfdkzz dshf;tybz (8) b (5)^ (6)^


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gjkexbv lbaathtywbfkmyjt ehfdytybt dnjhjuj gjhzlrf^


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jgbcsdf.ott hfpyjcnm afp 9v #d cbcntvt AFGX3:,


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n&t& cxbnftncz^ xnj 3RC #= 0& Afpjdsq gjhnhtn cbcntvs


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12.2. #Gjkjcf elth;fybz b gjkjcf dnzubdfybz cbcnt-A


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vs AFGX&,


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ckexft^ rjulf rhbdfz 3d9v#/3dt #gthtctrftn jcm f,cwbcc&


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cbcntvf AFGX cgjcj,yf dsgjkyznm cdjb aeyrwbb^


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cbkmyjv cbuyfkt yf d[jlt cbcntvs^ gjkjcf elth;fybz


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jghtltkztncz vfrcbvfkmysv pyfxtybtv htuekbhe.otuj


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yfghz;tybz^ f cktljdfntkmyj^ vfrcbvfkmysv pyfxtybtv


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^ 9v #= 33#/29p - #29p3n #^ ult 3n #= 0^ 31#^ &&& & ^,


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rjkt,fntkmysq [fhfrnth ghb ,jkmijv pyfxtybb gjcnjzyyjq


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dhtvtyb abkmnhf&,


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^ 13. #Rjv,bybhjdfyyfz cbcntvf AFGX - XFGX& ^,


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dhtvtyb abkmnhf& D nj ;t dhtvz XFGX kbityf 'njuj


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lkz evtymitybz afpjdjq jib,rb ghbvtyz.n rjv,bybhjdfyyst


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c[tvs AFGX - XFGX& Ckt;tybt pf xfcnjnjq d[jlyjuj


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cbuyfkf jceotcndkztncz cbcntvjq AFGX& Tt gfhfvtnhs


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