I was attempting the following problem.
In the question it says there is a non inverting amplifier with a feedback resistor of 100k ohms and a source resistor of 5k ohms. If I use the regular non-inverting op amp formula for the gain I get 21 V/V as the answer.
But in the question itself it also says that the gain of the amplifier is 10 V/V. So which is it?
Also do they mean when they say that the gain is 10V/V, that the gain after removing the output voltage consumed by the input bias current and the off set current.
Best Answer
The non inverting amplifier setup they are describing looks like this:
simulate this circuit – Schematic created using CircuitLab
You need to calculate the value of R3.
When they talk about "what range of outputs would you expect", they are talking about the output with V1 == 0V. That is not 100% clear in the problem description.
So given that, you should be able to calculate the output offset voltage from the bias and offset currents (assume different signs of the offset to get a range). The rest of the problem should be self-explanatory.