Bandpass Filter

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Bandpass Filter - PowerPoint PPT Presentation

Bandpass Filter. Approximate and Exact Solutions. The Circuit. Low-Pass Section R1 = 1k C1 = 10 nF High-Pass Section R2 = 100k C2 = 10 nF. Results for Ideal Cascade. Decibel gain. Phase shift. Transfer function: Ideal Cascade. Results for Exact Solution. Decibel gain. Phase shift.

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Bandpass Filter

Approximate and Exact Solutions

The Circuit

Low-Pass Section

R1 = 1k

C1 = 10 nF

High-Pass Section

R2 = 100k

C2 = 10 nF

Decibel gain

Phase shift

Results for Exact Solution

Decibel gain

Phase shift

Comparison of Solutions

Is it always that easy?

Yes, it can be!

But design carefully!!

Now modify the circuit

Low-Pass Section

R1 = 1k

C1 = 10 nF

High-Pass Section

R2 = 100k/100 = 1k

C2 = 10*100 nF = 1uF

High pass modified

Comparison of Solutions