Op amp limitations and bandwidth

greg997

Hi,could anyone explain to me those two things,please?

1. What is the path of the Input offset current and what is the Vout caused by it. It flows through Rx, thus V+ is IosxRx. The same voltage must be at V-. Then what?

2. What is the difference between inverting and non-inverting opamp when bandwidth is calculated? For the non-inv the gainxbandwidth product is constant but for inv is not. How is the -3dB calculated? An example with those two types would help a lot. Thanks.

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