How can I created or found Audio-frequency amplifier ?

Discussion in 'General Electronics Chat' started by rio7, Jan 11, 2015.

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  1. rio7

    Thread Starter Member

    Jan 1, 2015
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    Good morning,

    How can I created or found Audio-frequency amplifier ? I need schema ( better in NI Multisim ) who made with ( I don't know in english ) 4-steps/stage.

    Maybe someone have this schema example, NI Multisim or on photo ? I don't really care where it is from.
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    What power output do you need?
    This sounds like homework.
     
  3. rio7

    Thread Starter Member

    Jan 1, 2015
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    Pout = 2 W
     
  4. Ramussons

    Active Member

    May 3, 2013
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    Why don't you Google "2W audio amplifier"
     
  5. #12

    Expert

    Nov 30, 2010
    17,302
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    Lower the idle current in the 6V6 tube to reduce the output power from 5 watts to 2 watts.
     
    Last edited: Jan 14, 2015
    rio7 likes this.
  6. Ramussons

    Active Member

    May 3, 2013
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    :eek:
     
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  7. rio7

    Thread Starter Member

    Jan 1, 2015
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    But I have and R ( load ) = 12 Ω
    Uin = 12 mV
    Rin = 2 kΩ
     
  8. #12

    Expert

    Nov 30, 2010
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    Good! Giving us more information can cause better results. :)
     
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  9. rio7

    Thread Starter Member

    Jan 1, 2015
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    And finally I have: from F = 300 Hz until F = 7 kHz. Ant whats all. :)
     
  10. ian field

    AAC Fanatic!

    Oct 27, 2012
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    According to an author in one magazine, one of the UK pound shops had MP3 amplifiers for only £1, I never found any myself but various discount stores have similar items at slightly higher price - usually based on the likes of TDA2822 or LM386 etc, so some idea of typical specs can be got from the data sheets.

    A very simple amp chip to use is the TDA7052, the A suffix part has a DC volume control - its a BTL amplifier, so there are restrictions on output power if you need a common connection such as on a pair of ear-buds.
     
  11. rio7

    Thread Starter Member

    Jan 1, 2015
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    But how to created what type audio frequency amplifier ?
     
  12. ian field

    AAC Fanatic!

    Oct 27, 2012
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    1) Study the datasheet.

    2) look online for example schematics.

    3) Buy the chip.

    4) Wire it up.

    5) Tune for maximum smoke.

    HTH.
     
  13. crutschow

    Expert

    Mar 14, 2008
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    He's just kidding.

    You actually tune for minimum smoke. :rolleyes:
     
  14. rio7

    Thread Starter Member

    Jan 1, 2015
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    Up! I need just on NI Multisim!
    Like this:
     
  15. bertus

    Administrator

    Apr 5, 2008
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