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When looking at the four Op-amps listed, they all have useful  functions when it comes to circuit design. After doing some research the  one that interested me the most were Summing Amplifiers. A summing  amplifier setup is exactly as it sounds. It takes multiple voltage  inputs and combines them to create one voltage output. It can also act  as a subtractor if the output voltage is the difference between all the  input voltages. Since these amplifiers can do both, it gives them the  ability to be both Inverting and non-inverting based off the  configuration of the circuit, however most of the applications use the  non-inverting setup. Here is an example of both setups.

For the non-inverting setup above, you can find the gain using the formula: Av=1+(RA/RB)

For the Inverting setup above, you can find the gain using the formula Vout/Vin=-Rf/Rin

Some of the advantages to using this configuration is that you could  apply a DC voltage offset by using an AC signal voltage. This makes the  amplifier ideal use for digital to analog conversion applications which  is one of its primary usages. A great example of this is having multiple  digital inputs such at 0V representing a 0 in binary and having 5V  representing a 1 in binary. It will take the multiple inputs and convert  them to one output which can be analog. Another  usage is for audio mixing. It’s able to add different signals but keep  the gains equal. Since it can do both inverting and non-inverting this  is what makes it a popular choice for these applications.

Author unknown (2013) Elprocus, Summing Amplifier : Circuit Diagram and Its Applications


 Links to an external site.

Ashlin (2019, April) Forum Automation, SUMMING AMPLIFIER AND ITS APPLICATIONS


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Author unknown (2023, February 29) Electronics tutorials, The Summing Amplifier


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