Tutorial 2 - Op-Amps

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03:30 Problem 1

• Apply nodal analysis
• if $i$ out of $v_s=0$, $R_{\text{in}}=\infty$

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19:29 Problem 2

First case

• Apply nodal analysis
• Make use of known Op-Amp Circuits to find relations between voltages quickly
• Note cascaded form multiplies gains
• Take care which $R_{i}n$ is required Second case

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