Audio amplifier / Voltage Amplifier

Discussion in 'General Electronics Chat' started by sbin19, Dec 6, 2012.

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  1. sbin19

    Thread Starter New Member

    Dec 6, 2012
    Hello everyone,

    I hava a critical question related to my project. In our project, we have to amplify a signal 2V AC to 10V AC sinusoidal. How can we do this? The problem is that I know that MOS and BJT amplifiers have a limited input voltage like 5mv or 200mv at most. Their maximum gain is also limited. Then how I can get a 10V sinusoidal by implementing them? It seems impossible to me. If I have a 5mV signal ( that is the maximum input voltage that BJT can accept for small signal condition) , then also I have -100 gain, then the output is 100x5mv= -0.5V AC.. It is much smaller than 10V AC.. Can you help me at this point, thanks a lot?

    ( Project: Audio amplifier. We need to drive 8ohm speaker at 6W. The input is a mp3 player, can supply 1V-2V Ac sine wave. Any other recommendation related to project will be fine also - use bjt mos amplifiers and class ab output amplifier)
  2. bertus


    Apr 5, 2008
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