Amplifier Gain

[ForexAnalyzer]

I am planning to find the gain of the non-inverting operational amplifier as attached (Forum Help.ms14) and also the photo inserted.

Using the fomula 1 + Rf1/Rin1, i should get a gain of 2 db. However, when I simulate it, i will get 5.229dB. May I know where did I go wrong? Currently using Multisim 14

[hmiraquesa]

Hi ForexAnalyzer,

The dB option of the Multimeter is to calculate the decibel loss between two nodes in a circuit. It wouldn't measure the gain of an amplifier.

The suggested way to know if a circuit is working is to calculate the gain using the formula and verify if that matches the expected output. I will recommend using an oscilloscope to measure the output. unfortunately, there is no instrument to measure the gain of a circuit directly.

As you can see in the image below, the output is 2V pk-pk.

As you can see, the output matches the correct gain. 

Regards

Hector M

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