Definition: Ceramic filters are passive electronic components that use piezoelectric ceramic materials to provide frequency selectivity in RF and IF stages of communication equipment.

Common Applications:

• Intermediate Frequency (IF) filtering in radios and TVs
• Noise suppression in power and signal lines
• EMI/RFI filtering

Key Features:

• High stability and reliability
• Narrow bandwidth with sharp roll-off
• Low cost and small size
• Typical center frequencies: 455 kHz, 10.7 MHz, etc.

PIN Configuration (Typical 3-Pin):

• Pin 1: Input
• Pin 2: Ground
• Pin 3: Output

Design Tips:

• Always refer to manufacturer datasheet for exact specs
• Keep input/output traces short to avoid parasitic coupling
• Use proper PCB grounding near the filter
• Match impedance if required by circuit design