Consider the circuit in attached figure L9.12. Suppose that the voltage at the V+ input pin of the op-amp is +5VDC.
What will the output voltage out be if the input voltage is in=3V?
What will the output voltage out be if the input voltage is in=7V?
Op amps are a new concept to me so i need help understanding how they behave.© BrainMass Inc. brainmass.com October 10, 2019, 12:02 am ad1c9bdddf
I'm going to approach this conceptually since that seems to be where your struggles lie.
First, understand that op-amps are differential amplifiers that amplify the voltage difference between the V+ and V- terminals. What you have in this case, is a diode that determines whether there is a feedback path or not, based on whether it is forward or reverse biased.
We have been told that the V+ is 5V.
Assuming an ideal op-amp:
Vin = 3V case: Remember that no current enters or ...
Output voltage in amps is examined.