Frequency Response & Bode Plots
Analyzing how circuits respond to different frequencies using Bode plots and transfer functions.
Frequency response describes how a circuit's gain and phase shift vary with input frequency. Bode plots provide a graphical method for analyzing and designing filters and amplifiers.
Objectives
- Understand transfer functions and poles/zeros
- Construct and interpret Bode magnitude and phase plots
- Identify cutoff frequencies and bandwidth
- Analyze first and second-order systems
- Design basic RC and LC filters
Key Takeaways
- Transfer functions describe circuit behavior mathematically
- Bode plots show gain and phase vs frequency
- Each pole adds -20dB/decade and -45° at corner frequency
- Q factor controls resonance peaking and bandwidth