Filter Connector Types

Difference Between Filter Types

- High source or load impedance >100 Ohms
- Low source or load impedance < 10 Ohms

Pi Filter Connector
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Advantages

• Able to Obtain 40 Db Per Decade
• Able to Achieve Very Good Attenuation
• Cascaded Pi- 60 dB per decade
• Construction Consists of Two Capacitors With a Ferrite in Between

Disadvantages

• Relatively Expensive Due to Two Capacitors
• Makes Connector Much Longer Than the Standard Connector

L Filter Connector
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Advantages

• Able to Obtain 20 Db Per Decade
• Able to Better Attenuation Than C Filter
• Construction Consists of a Capacitor With a Ferrite on One Side. This Ferrite Can Go on the Load Side or the Other Side, Depending on the Customer Requirements.
• Cost Advantage Over Pi Filter

Disadvantages

• Not As High Attenuation As Pi Filters
• Connector Longer Than LC or C Filters (Must Accommodate Two Potentially Long Ferrites)

C Filter Connector
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Advantages

• Able to Obtain 20 Db Per Decade
• Much Shorter Than Other Filter Types
• Construction Consists of a Capacitor or Combination of Capacitors Only
• Cost Advantage Over Other Filter Types Due to Fewer Filter Components

Disadvantages

• Not As High Attenuation As the Other Filters That Include Ferrite Inductors in Their Circuit