An alternative to POWER AMPLIFIER IC Sanyo LA4537M

Discussion in 'General Electronics Chat' started by vinodquilon, Jan 12, 2011.

  1. vinodquilon

    Thread Starter Member

    Dec 24, 2009
    234
    0
    I am going to set up one hearing aid circuit using POWER AMPLIFIER iC la4537m (see the attachment).

    But in our locality this IC is rarely avail. Can anyone suggest any alternative ic to
    la4537m so that I can directly replace on main circuit ?
     
  2. vinodquilon

    Thread Starter Member

    Dec 24, 2009
    234
    0
    I choose TDA2822M.

    I can change its mono configuration to stereo easily,but- it can
    only input through two channels only.

    How can I configure a commercially available hearing aid circuit
    that can absorb all surrounding sounds around patient within reasonable range ?


    [​IMG]
     
  3. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    A hearing aid does not boost all audio frequencies. It boosts only frequencies that need boosting, usually high audio frequencies.

    Your schematic is too fuzzy to see any details.
     
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