Using any number of Op-Amps, design multistage amplifier to amplify input Ac signal with 0.01V amplitude, the expected output voltage would have 4V amplitude.

The input signal frequency = 10 KHz.

Assume gain bandwidth product of Op-Amp = 1 MHz

• Design and construct (or simulate) the project using bred board (or software simulation programs).

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  Sanjay Gupta answered this

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  Hi,

  Some explanation first:

  1. The required overall amplification = 4/0.01 = 400

  2. An op-amp with 1MHz gain-bandwidth product can give us a maximum gain of 1*10⁶/10*10³ = 100, at 10KHz

  3. Therefore we can need a two stage-amplication, each with amplifcation of 20.

  4. This circuit can be made and simulated in LTspice, as shown below. The simulation result (the output waveform) is also shown.

  

  As you can see, the output amplitude is almost 4V, as expected.

  Hope this helps

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