The SAA4960 is an integrated PAL comb filter with adaptive function, compatible with PAL systems, and provides high performance in Y/C separation.
The Philips SAA4960 is an adaptive, alignment-free one-chip comb filter designed for high-performance Y/C separation in PAL systems. It processes video standards including PAL B, G, and H, with the capability to handle SECAM and SVHS signals via a bypass mode.
The device utilizes internal delay lines, filters, clock processing, and signal switches to ensure no hanging dots or residual cross-color on vertical transitions. Operation is controlled through four specific pins: BYP for forcing bypass mode, SSYN for defining synchronous entry into comb mode, FSCSW for reference frequency selection, and LPFION for enabling the internal pre-filter.
The PAL comb filter processes the video standards PAL B, G and H.
Bypass mode is forced via the BYP pin (pin 3) by applying a specific logic level depending on the SSYN setting.
The PLL and clock processing are always stopped if the selected level for bypass is applied to the BYP pin.