Hi,
I'm stuck trying to find and explanation for a given solution to an OPAmp exercise:
The goal is simply to find an expression that connects the output V_O to the input V_S.
This is the solution provided:
Is that solution correct? There's no explanation to it and the only way I can make sense of it is this:
Thanks a lot
I'm stuck trying to find and explanation for a given solution to an OPAmp exercise:
The goal is simply to find an expression that connects the output V_O to the input V_S.
This is the solution provided:
Is that solution correct? There's no explanation to it and the only way I can make sense of it is this:
 No current can flow through the I_1 branch, because
 R_x is in parallel to the inputs of the OPAmp
 In the ideal case, the inputs have the same voltage
 Therefore no voltage can drop over R_X, so no current can flow there either
 Since no current can flow through the inputs of the OPAmp, the entire I_1 branch can't have current and is therefore irrelevant
 Current can flow through the I_2 branch
 (I guess from the end of that branch to the +Input of the OPAmp?)
Thanks a lot
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