Filters are passive components designed to shape the frequency content of electrical signals by selectively allowing certain frequency ranges to pass while reducing others. They are used to manage signal integrity and control unwanted spectral content within electronic circuits.
In general, filters are categorized by their frequency-selective behavior, such as:
- Low-pass filters
- High-pass filters
- Band-pass filters
- Band-stop (notch) filters
Within passive component families, filters are commonly realized using combinations of resistive, capacitive, and inductive elements, forming networks that provide predictable frequency response without requiring active amplification.
