Question

How to Design amplifier circuit that has a gain of 1000 to 1500. And apply it on multisim.

Answer 1

You can design an amplifier with a voltage gain of 1000 or 1500 by using an operational amplifier. An inverting amplifier is shown in the figure below.

Voltage gain of this amplifier is given as

It can be seen that voltage gain depends on the ratio of the resistors, therefore, by maintaining proper ratio, we can achieve whatever gain we wants. For eg, to get a voltage gain of 1000, we need

or

Let's choose

then

So the following circuit will give you the gain of 1000

You can proceed in the same way to obtain any voltage gain. These op-amp ICs are reliable as well as cheap. Remember, if your amplifier is going in saturation, decrease the input.

Here is the multisim simulatiion circuit

Here is the Oscilloscope screen , which is showing gain of 1000, Red one is input and blue one is output. Input is in channel A while output is in channel B

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