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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A CMOS Line Driver for ADSL Central Office Applications
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A CMOS Line Driver for ADSL Central Office Applications

机译：用于ADSL中央局应用的CMOS线路驱动器

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摘要

An ADSL central office (CO) line driver utilizing a single 6-V supply is described. The line driver output produces a 20-V{sub}(ppd) signal to deliver a 40-V{sub}(ppd) swing to a 100-Ω line. The adoption of an active termination, a dynamic supply control circuit technique, and deep n-well devices at the output stage of the line driver is key in achieving such a large voltage swing in a 0.25-μm CMOS process. In order to ensure reliability of the output devices, the dynamic supply control algorithm is designed to activate only one lift amplifier at each signal path of the differential line driver at any given time. A transformer turns ratio of 1:2.4 ensures both reliability and optimal power dissipation in the presence of system losses. The total power dissipation of the line driver is 700 mW when discrete multitone signals with a crest factor of 15 dB were used to deliver 20.4 dBm to a 100-Ω line.
机译：描述了一种利用单个6 V电源的ADSL中心局（CO）线路驱动器。线路驱动器输出产生20V {sub}（ppd）信号，以将40V {sub}（ppd）摆幅传送至100Ω线路。线路驱动器输出级采用有源端接，动态电源控制电路技术和深n阱器件是在0.25μmCMOS工艺中实现如此大电压摆幅的关键。为了确保输出设备的可靠性，动态电源控制算法被设计为在任何给定时间在差分线路驱动器的每个信号路径上仅激活一个提升放大器。 1：2.4的变压器匝数比可确保可靠性和最佳功耗，同时避免系统损耗。当使用波峰因数为15 dB的离散多音信号向100Ω线路传输20.4 dBm时，线路驱动器的总功耗为700 mW。

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