# Gain error calculation for op-amp circuit in inverting configuration

For an inverting op-amp, calculate minimum gain that is required for the op-amp to achieve a gain error of 1%, if the required closed-loop DC gain is -9.

If the input resistance R1 is 1Kohm,find the feedback resistance R2 that achieves the required gain of closed loop.

Calculate the settling time, if the amplifier is applied a small step input and the response reaches 94% of it's final steady-state value. The op-amp, in open-loop condition, assumed to have only a single dominant pole at ω−3dB=6M Rad/Sec.

• What have you tried so far? Where are you stuck? Add the steps that you have already followed to reach the answer by using the edit button below your question. It will improve the chances of getting an answer. – AJN Jul 27 at 6:56
• What is the open loop gain of the opamp ? Is that value not reqired along with $\omega_{3dB}$ to get an answer ? Also, what do you mean by gain error ? – AJN Jul 27 at 6:58
• The gain error is given to find the open loop gain i thought. – Mahesh Bhat K Jul 27 at 6:59
• Would you consider that part of the question (open loop gain calculation) already answered then ? – AJN Jul 27 at 7:02