help me!

Discussion in 'Wireless & RF Design' started by aj_silverthunder, Nov 17, 2009.

  1. aj_silverthunder

    Thread Starter Active Member

    Jun 6, 2009
    116
    0
    i am using this amplifier to amplify the weak signals from TDA7000,i think its audio output will be 75mV,so if the input capacitor capacitor value is 2.2μF(16V),i think there will be no problem!
    what do u say!!!!
     
  2. aj_silverthunder

    Thread Starter Active Member

    Jun 6, 2009
    116
    0
    here is the amplifier circuit
     
  3. BMorse

    Senior Member

    Sep 26, 2009
    2,675
    234

    READ YOUR OTHER THREAD ABOUT THIS SAME PROBLEM AND YOU WILL HAVE THE ANSWER!!

    IN RF or AUDIO circuits it is best to stick with the bill of materials, so 16 VOLT CAP WILL NOT WORK FOR THE 3 VOLT THAT IT CALLS FOR SINCE IT IS PART OF THE AF INPUT!!!
     
  4. aj_silverthunder

    Thread Starter Active Member

    Jun 6, 2009
    116
    0
    but 3v cap is not available,is there any alternative for this ,please help me guys
     
  5. aj_silverthunder

    Thread Starter Active Member

    Jun 6, 2009
    116
    0
    what if i use a ceramic capacitor instead of electrolytic cap for C1 in TDA2003 schematic
     
  6. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
    Hello,

    A non-polarized capacitor like MKM or polystyrene will work.

    Greetings,
    Bertus
     
  7. aj_silverthunder

    Thread Starter Active Member

    Jun 6, 2009
    116
    0
    thank u very much
     
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