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lab05_en:inverting_op-amp_basics_amplification [2026/04/28 15:29] – [Gain of Op-Amp] mexleadminlab05_en:inverting_op-amp_basics_amplification [2026/04/28 16:21] (current) – [Analysis of inverting input currents] mexleadmin
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-== Investigation of inverting input ==+== Analysis of inverting input currents ==
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 {{drawio>lab05:Fig-30_inverting_op-amp_inv_input.svg}} {{drawio>lab05:Fig-30_inverting_op-amp_inv_input.svg}}
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-<imgcaption Fig-30_inverting_op-amp_inv_input | Inverting Op-Amp: Investigate currents of the inverting input> </imgcaption>+<imgcaption Fig-30_inverting_op-amp_inv_input | Inverting Op-Amp: Analysis of currents of the inverting input> </imgcaption>
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 $U_{\rm DD}{\rm~=10~V},~U_{\rm SS}{\rm~=-10~V},~R_{\rm 1}{\rm~=10~k\Omega}$\\ \\ $U_{\rm DD}{\rm~=10~V},~U_{\rm SS}{\rm~=-10~V},~R_{\rm 1}{\rm~=10~k\Omega}$\\ \\
 Use the values from <imgref Fig-20_inverting_op-amp> for $U_{\rm IN},~U_{\rm OUT},~R_{\rm 2}$. Use the values from <imgref Fig-20_inverting_op-amp> for $U_{\rm IN},~U_{\rm OUT},~R_{\rm 2}$.
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 Complete the arrows in the scematic of the circuit.\\ Complete the arrows in the scematic of the circuit.\\
-Determine the the currents $I_{\rm 1}$ and $I_{\rm 2}$ indirectly by measuring the voltage across known resistors.\\ +Determine the the currents $I_{\rm 1}$ and $I_{\rm 2}$ indirectly by measuring the voltage across known resistors\\ 
-Calculate the algebraic sum of the currents at node $N_{\rm {12}}$ using Kirchhoff’s Current Law (KCL). +and calculate the algebraic sum of the currents at node $N_{\rm {12}}$ using Kirchhoff’s Current Law (KCL).
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-$U_{\rm 2}{\rm~=}$+$U_{\rm 2}{\rm~=}$\\ 
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 $I_{\rm N12}{\rm~=}$ $I_{\rm N12}{\rm~=}$
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 +== Analysis of inverting input voltages ==
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-<imgcaption Fig-40_inverting_op-amp_inv_input_virt_gnd | Inverting Op-Amp: Investigate the virtual GND of the inverting input> </imgcaption>+<imgcaption Fig-40_inverting_op-amp_inv_input_virt_gnd | Inverting Op-Amp: Analysis of virtual GND of the inverting input> </imgcaption>
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-Analyze the physical significance of the potential at $N_{12}$ relative to GND (defined as $U_{12}$) in the context of the operational amplifier's input configuration. What do you observe?\\+Analyse the physical significance of the potential at $N_{12}$ relative to GND (defined as $U_{12}$) in the context of the operational amplifier's input configuration. What do you observe?\\
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 ${\rm ................................................................................................}$ \\ \\ ${\rm ................................................................................................}$ \\ \\