Interpolative PCM CODECs with multiplexed digital filters
Hiroshi Kuwahara, H. Kosugi, K. Imai, O. Yumoto, M. Ohnishi, Eiichi Amada, T. Okabe, Hirotoshi Shirasu · 1980
A single-chip CODEC - a 32kHz sampling 12b linear AD/DA - with pre-post - filters implemented in I2L without trimruing, will be described. The digital filter chip is shared between four CODECs: it has a 88dB dynamic range and operates at 2MHz with 16b word length.