Difference Amplifier

 In the bottom right we provided the relationship between the output voltage and the input voltage. Which broke down to the output V is equal to R2/R1*(Vb-Va). It's called a difference amplifier because it amplifies the difference between the two V sources and rejects the common signal between the two.

Here is a schematic of the circuit we made. The actual resistances of the resistors are on the
previous pic. Which were R1=R3=9.7 kOhm, and R2=R4=19.9 kOhm












Here's a table of our output and input voltages.
















Our graph sort of worked out. It roughly resembles a proper saturation graph


 This one however is completely off.
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Here are our values in excel with error. When Vb=1 i expected the saturation to be around 4.30 and -4.6, since our values topped off around there. However, when Vb=-1 we got max 5.24 and -3.6. So there must've been a mistake with our circuit. However, some values did make sense. For example, when Vb=1 our values for Va=-1 through Va=3 made sense, and when Vb=-1 our values for Va=-2 through Va=0 made sense.

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