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本文描述了一个符合AT＆T/CCITT规范的双信道Σ△音频编/解码器。其数字信号处理部分为可扩展到适应更高位数分辨率的位片结构。每个信道的有效面积为13mm~2,采用1.5μmCMOS工艺。它只有一个电源,其最大功耗为每信道90mW。信道之间的串扰小于-70db。
This article describes a dual channel ΣΔ audio encoder / decoder that conforms to AT & T / CCITT specifications. The digital signal processing section is a bit-slice architecture that can be scaled to accommodate higher bit resolution. The effective area of each channel is 13mm ~ 2, using 1.5μmCMOS process. It has only one power supply and its maximum power consumption is 90mW per channel. Crosstalk between channels is less than-70db.