SAA7220 DIGITAL FILTER FOR COMPACT DISC DIGITAL AUDIO SYSTEM GENERAL DESCRIPTION The SAA7220 is a stereo interpolating digital filter designed for the Compact Disc Digital Audio system.
For descriptive purposes, the SAA7220 is referred to as the B-chip and the SAA7210 as the A-chip.
Features • 16-bit serial data input (two's complement) • Interpolated data replaces erroneous data samples • -12 dB attenuation via the active LOW attenuation input control (ATSB) • Smoothed transitions before and after muting • Two identical finite impulse response transversal filters each with a sampling rate of four times that of the normal digital audio data • Digital audio output of 32-bit words transmitte...

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