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首页> 外文期刊>IEEE Journal of Solid-State Circuits >Time resolution of NMOS sampling switches used on low-swing signals
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Time resolution of NMOS sampling switches used on low-swing signals

机译:用于低摆幅信号的NMOS采样开关的时间分辨率

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A number of recently reported CMOS line receivers andndownconversion mixers are based on sampling. A key component in thesendesigns is the NMOS sampling switch. It can sample a very high bandwidthnsignal, several GHz for a 0.8-Μm transistor. We present an expressionnfor the aperture time for an NMOS switch when the input has low swing.nThe switch can, under this condition, be modeled as a device thatndetermines a weighted average over time of the input signal. The weightnfunction is derived. The aperture time function shows that the maximumntheoretical time resolution for a switch in 0.8-Μm standard CMOS isn21 ps (~48 Gb/s). SPICE simulations agree with the theory. Transientntwo-dimensional (2-D) device simulations do not contradict the predictednresults. Experiments on a switch made in a 0.8-Μm standard CMOSnprocess show successful sampling of every thirty second bit of a 5-Gb/sndata stream
机译:最近报道的许多CMOS线路接收器和下变频混频器都是基于采样的。 sendesigns中的关键组件是NMOS采样开关。它可以为0.8μm的晶体管采样非常高的带宽信号,几GHz。当输入具有低摆幅时,我们给出了NMOS开关的孔径时间的表达式.n在这种情况下,可以将开关建模为确定输入信号随时间变化的加权平均值的设备。加权函数被导出。孔径时间函数显示,在0.8Mm标准CMOS中,开关的最大理论时间分辨率为21 ps(〜48 Gb / s)。 SPICE模拟与该理论一致。瞬态二维(2-D)设备仿真与预测结果并不矛盾。在以0.8微米标准CMOSn工艺制成的交换机上进行的实验表明,成功采样了5-Gb / sn数据流的每30秒比特

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