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Op-Amp Based Band Pass Filter

Op-Amp Based Band Pass Filter. Equivalent Circuit @ DC. (DC feedback). Equivalent Circuit @ ω = ω o. Circuit Analysis. (Solve for Vout /Vin). Circuit Analysis. Second Order Bandpass Filter. Bandwidth of Second Order Bandpass Filter. Circuit Parameters. Matlab Script.

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Op-Amp Based Band Pass Filter

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  1. Op-Amp Based Band Pass Filter

  2. Equivalent Circuit @ DC (DC feedback)

  3. Equivalent Circuit @ ω=ωo

  4. Circuit Analysis (Solve for Vout/Vin)

  5. Circuit Analysis

  6. Second Order Bandpass Filter

  7. Bandwidth of Second Order Bandpass Filter

  8. Circuit Parameters

  9. Matlab Script

  10. Cadence Simulation

  11. Tunable Bandpass Filter

  12. BPF at 100 Hz 12.396 mS 15.15 mS Vout is delayed by 2.76 mS, approximately ¼ of a period.

  13. Closer Look at 950 Hz (Vout is larger than Vin!)

  14. BPF at 10 KHz

  15. Question • What is tunable? • Not a capacitor! (Not an absolute requirement, since you can always do switches to add/remove capacitors) • Resistor, but which resistor? Consequnce? • R3+R4 • R1 • R2

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