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I don't understand where the solution for part C coming from. What I thought is also Vo/Vi. I found Vo as 303 mV and Vi as Vs*(10/10+100). However in solution it seems my thought is wrong. How should I think?

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  • \$\begingroup\$ How did you derive the formula for a voltage divider? \$\endgroup\$ – Circuit fantasist Apr 3 at 6:41
  • \$\begingroup\$ In point C you need to find the voltage gain from point Vi to Vo. \$\endgroup\$ – G36 Apr 3 at 7:05
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You need to take into account the circuit without the generator (and then the associated resistance). Once you detach the generator you should use a voltage divider using RO and RL to find the output voltage VO dependant on Vi (and so the requested transfer function).

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