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Op Amp AC Circuits

Op Amp AC Circuits. ELEC 202 Electric Circuit Analysis II. Assumptions. Op Amp assumed to be operating in the linear region. Op Amp assumed to be ideal having two important characteristics: (a) no current enters neither of its input terminals;

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Op Amp AC Circuits

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  1. Op Amp AC Circuits ELEC 202 Electric Circuit Analysis II

  2. Assumptions Op Amp assumed to be operating in the linear region. Op Amp assumed to be ideal having two important characteristics: (a) no current enters neither of its input terminals; (b) The voltage across its input terminals is zero.

  3. Solving Techniques Transform the circuit into phasor domain. Labels currents into the input terminals of op amp and node voltages at all other nodes in the circuit. Use Nodal analysis to solve for node voltages.

  4. Example 1 Determine vo(t) for the following op amp AC circuit with vs(t) = 3 cos 1000t V.

  5. Example 1 (cont’d)

  6. Example 2 Compute the closed-loop gain and phase shift for the following circuit with R1 = R2 = 10 kW, C1 = 2mF, C2 = 1mF, and w = 200 rad/s.

  7. Example 3 Determine vo(t) and io(t) in the following op amp AC circuit with vs(t) = 2 cos 5000t V.

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