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    Jinsi ya kutengeneza Mzunguko wa Moduli ya Amplitude AM?

     

    Maelezo:
    Mzunguko hii inatumia jenereta ishara mbili kuiga amplitude Modulated RF carrier wimbi. pato inaweza kutumika kuiga majibu ya nyaya LC na tank.

     

    moduleta

    Vidokezo:
    Jenereta ishara mbili ni kutumika katika hili mzunguko, mmoja anayewakilisha frequency juu (200kHz) RF carrier, VG2, wengine jenereta signal ni kutumika kuingiza redio 1KHz signal. ishara mbili ni mchanganyiko na alijiinua na transistor na amplitude ishara modulated inaonekana katika ushuru wa BC548. Sehemu DC ni kuondolewa kwa C2 na R3 na pato RF sasa inaonekana hela R3 resistor mzigo. Waveforms chini ni zinazozalishwa kwa kutumia Tina.

     



    Spice Netlist:
    netlist viungo ni hapa chini. Nakala mistari yote kati ya * ya asubuhi na. MWISHO na kuweka kwenye faili mpya Nakala kuitwa vmod.cir au sawa.

    * AM RF moduleta
    . AC Desemba 16 1 1.0MEG
    . Tran 4U 2M
    . DC Lin VG2 0 1 10M
    . KIWANJA V (3)
    Vcc 1 0 30
    VG2 2 0 DC 0 AC 1 0 DHAMBI (0 10M 200K 0 0-90)
    VG1 4 0 DC 0 AC 1 0 DHAMBI (0 5 1K 0 0-90)
    C3 5 0 100N
    C2 6 3 470P
    C1 2 7 100N
    R5 0 7 15K
    R4 7 1 56K
    R3 0 3 1K
    R2 4 5 4.7K
    R1 1 6 10K
    QT1 6 7 5 Q_BC548_N
    . MODEL Q_BC548_N NPN (IS = 16.9F NF = 1 NR = 1 RE = 567M RC = 1
    + RB = 10 VAF = 56.7 Var = 28.3 ISE = 154F ISC = 154F
    + NE = 1.5 NC = 1.5 BF = 1.16K BR = 5 IKF = 29.5M
    + = TUKI 29.5M CJC = 3.35P CJE = 6.85P VJC = 3.57 VJE = 1.09
    + MJC = 489M MJE = 432M TF = 796P TR = 103N EG = 1.11
    + Gezeceyem = 0 AF = 1)
    . MWISHO

    Ili kutoa pato katika Spice Opus anza programu na upakie vmod.cir mpya Ishara iliyosimamiwa inaonekana kwenye R3 ambayo sasa ni node 3 na dunia. Baada ya kupakia mzunguko amri "orodha" itaonyesha orodha ya wavu. Amri "kukimbia" kisha itaiga mzunguko, "onyesha" itachapisha orodha ya anuwai zote kwenye mzunguko. Mpangilio wa amri v (3) utaonyesha wimbi la AM kati ya node 3 na 0 yaani kipinga-mzigo R3.

     


    Kumbuka kuharakisha simulation, carrier RF imekuwa mdogo kwa 200KHz tu, na waveform pato tu inaonyesha mbili mzunguko kamili ya wimbi redio, yaani 2ms kama frequency modulating ni 1k. Kutakuwa na tutorials baadhi ya viungo hivi karibuni katika kurasa yangu.
     

     

     

     

     

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