Lab 8-5 : Current Source
This measures how a non inverting amplifier compares as an output current source.
We found that the current of this circuit stays the same no matter how we turned the potentiometer. So it is a very stable current source that is independent of the second resistor in the circuit.
Lab 8-6 : Current to Voltage Converter
In these circuits, we were using diodes as sources of current which feed into the opAmp circuit to create a corresponding output voltage. We set this experiment up but, unfortunately, it didn't work for some reason and because Professor Berg was also unable to discover the answer to our problems we forewent this lab and moved onto the next one.
Lab 8-7 : Summing Amplifier
When we have two sources of current feeding into the input of the opAmp, the two currents will be summed at the junction. We can figure out the output voltage using V=IR where the current is the sum of the two currents. If the resistors over the two input currents are the same, then the output voltage is proportional to the sum of the input voltages.
In this experiment, we used one DC voltage source and one AC voltage source. In the output, we just saw the amplification of the AC input voltage with a DC offset.
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