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首页> 外文期刊>IEEE Journal of Solid-State Circuits >CODEC for echo-canceling, full-rate ADSL modems
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CODEC for echo-canceling, full-rate ADSL modems

机译:适用于回声消除,全速率ADSL调制解调器的编解码器

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摘要

A CODEC, fabricated in 3.3-V CMOS, provides the low-voltage transmitter and receiver interfaces between the modem digital signal processing engine and the high-voltage hybrid circuitry for either the central office or the remote terminal ends of the subscriber loop, configurable by metal mask option. Extensive use of digital interpolation filters in the transmitter, decimation filters in the receiver, and oversampled data converters minimize the complexity of analog filters. On-chip filtering and 14-bit data converters support echo-canceling modems without requiring external filters. With additional external filters, frequency-division duplexing is also supported. The die area is 67.5 mm/sup 2/. The power dissipation in the central office and remote terminal are 600 and 760 mW, respectively.
机译:用3.3V CMOS制成的编解码器为用户环路的中心局或远程终端提供了调制解调器数字信号处理引擎与高压混合电路之间的低压发送器和接收器接口,可通过以下方式配置金属掩膜选项。发射器中数字插值滤波器,接收器中抽取滤波器和过采样数据转换器的广泛使用使模拟滤波器的复杂性最小化。片上滤波和14位数据转换器无需外部滤波器即可支持回声消除调制解调器。使用附加的外部滤波器,还支持频分双工。模具面积为67.5mm / sup 2 /。中心局和远程终端中的功耗分别为600和760 mW。

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