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power amplifiers

Discussion in 'Electronics Homework Help' started by sandy23, Mar 20, 2011.

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  1. sandy23

    sandy23

    2
    0
    Mar 20, 2011
    hey am looking for anyone who could help me in the circutory and list of components to build an 8ohm or 4ohm power amplifier with the darlington pair as an output.also additional info on why the quasi complementary is discarded nowadays.its a school project
     
  2. davenn

    davenn Moderator

    13,901
    1,970
    Sep 5, 2009
    Hi sandy, welcome to the forums :)

    what sort of power levels ? mono or stereo ? Line level or mic level or both inputs ?

    have you searched on google yet, there are masses of circuit ideas on there :)
    find some ccts on there and show us links to them. Us guys here can then help with recommendations on which ccts are good or bad :)

    cheers
    Dave
     
    Last edited: Mar 20, 2011
  3. barathbushan

    barathbushan

    223
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    Sep 26, 2009
    This might be because of high transient noise , low efficiency , and poor symmetry at the crossover region
     
  4. sandy23

    sandy23

    2
    0
    Mar 20, 2011
    thanks so much to u all
    Dave will try.i got some......
    am thinking of working with a 4ohm load to generate 50w for audio
    any ideas on which is the best circuit to build power amplifiers with??
    am currently going with class AB because of its advantages
     
    Last edited: Mar 23, 2011
  5. davenn

    davenn Moderator

    13,901
    1,970
    Sep 5, 2009
    ok here's a respectable choice...

    its a stereo amp module LM3886TF
    http://www.national.com/mpf/LM/LM3886.html#Overview
    easy 50W into 4 Ohm load :)

    I suggest a IC type amplifier as it will drastically reduce component count and complexity of your circuit compared to a discrete transistor amplifier
    These chips are only ~ $17.00 in Australia

    D
     
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