The AST All-digital Tuner Chip Set

This paper describes a pair of chips developed at Applied Signal Technology (AST) to be used for down converting and isolating narrow band signals from a wideband source. The chips will accept 12 bit data sampled at rates up to 35 MHz and will isolate signals with bandwidths up to 70 kHz wide. The output sample rate can be varied between 70 kHz (decimate by 512) and 4.27 kHz (decimate by 8 1 92).