What is the frequency response of a circuit?

To analyze frequency response, you typically look at:

1. **Magnitude Response:** This shows how the amplitude of the output signal changes with different input frequencies. It is often plotted as a Bode magnitude plot, where the x-axis represents frequency (usually on a logarithmic scale) and the y-axis represents the gain or attenuation (in decibels).

2. **Phase Response:** This shows how the phase of the output signal shifts relative to the input signal across different frequencies. It is often plotted as a Bode phase plot, where the x-axis represents frequency and the y-axis represents phase shift (in degrees or radians).

The frequency response is crucial for understanding how a circuit behaves in real-world applications, especially in filters, amplifiers, and signal processing systems. It helps in designing circuits to meet specific performance criteria, like ensuring a filter passes only certain frequency ranges or an amplifier provides a consistent gain across a range of frequencies.