The Sampling IF (SIF) filter in the receiver actually performs several operations simultaneously. Its principal function is to provide channel select filtering. In addition, the SIF provides image reject filtering, anti-aliasing filtering, AGC, sampling, and digitization.
The SIFs have an input frequency up to 1200 MHz with up to 40 MHz bandwidth suitable for integration into FM, WiMax, Wi-Fi, W-USB, GPS, Bluetooth, and RFID tag readers.
- Narrowband/Wideband Sampling IF Filters KR-IFS-100 (PDF)
- WiMAX Low Pass Filter KR-SIF-LP-20-01 (PDF)
- Wireless USB Low Pass Filter KR-SIF-LP-233-01 (PDF)
- Wireless USB Low Pass Filter KR-SIF-LP-233-02 (PDF)
- Image Reject Sampled-IF Filter/Down-Converter KR-SIF-IR-108-TSMC-130-01 (PDF)
- Image Reject Sampled-IF Filter/Down-Converter KR-SIF-IR-10.7-TSMC-130-01 (PDF)
The SIF Filter replaces a traditional IF filter in a radio or eliminates several off-chip IF filters in multi-mode radios. In public security band radios, the programmability of a SIF Filter eliminates the need for multiple off-chip crystal filters.