Electrical Engineering › Section N · Decibels, filters, and Bode plots › Topic N.4
Bode plots
Calculating a filter's gain point by point is slow. A Bode plot replaces the curve with a few straight lines that you can sketch in a minute, then correct by known amounts, and it works for whole amplifiers as well as single filters.
In this topic
- Straight lines instead of curves
- The high-pass factor and its asymptotes
- Corrections near the corner
- Phase asymptotes
- The low-pass factor
- Worked example: sketching a high-pass Bode plot
- Building up more complex responses
- Worked example: an amplifier's frequency response
- Common mistakes to avoid
- Key takeaways
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