Electrical Engineering › Section N · Decibels, filters, and Bode plots › Topic N.3
Pass-band and stop-band filters
A radio picks one station out of dozens, and an audio interface removes a single interfering tone. Both jobs need filters that act on a band of frequencies, built either from R-C stages or from the resonant circuits met earlier in the course.
In this topic
- Selecting or rejecting a band
- Cascading a high-pass and a low-pass stage
- Worked example: an R-C band-pass filter
- Band-pass with a series resonant circuit
- Band-pass with a parallel resonant circuit
- Worked example: a series resonant band-pass filter
- Stop-band filters
- Worked example: a double-tuned filter
- Common mistakes to avoid
- Key takeaways
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