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Op-Amp Based Band Pass Filter. Equivalent DC (DC feedback)

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Presentation on theme: "Op-Amp Based Band Pass Filter. Equivalent DC (DC feedback)"— Presentation transcript:

1 Op-Amp Based Band Pass Filter

2

3 Equivalent DC (DC feedback)

4 Equivalent ω=ω o

5 Circuit Analysis (Solve for Vout/Vin)

6 Circuit Analysis

7 Second Order Bandpass Filter

8 Bandwidth of Second Order Bandpass Filter

9 Circuit Parameters

10 Matlab Script

11 Cadence Simulation

12 Tunable Bandpass Filter

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

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

15 BPF at 10 KHz

16 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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