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    • 31. 发明授权
    • Reducing coupled noise in pseudo-differential signaling systems
    • 减少伪差分信号系统中的耦合噪声
    • US07099395B1
    • 2006-08-29
    • US09708795
    • 2000-11-07
    • Stefanos SidiropoulosYingxuan LiMark A. Horowitz
    • Stefanos SidiropoulosYingxuan LiMark A. Horowitz
    • H04B3/00
    • H04L25/0292H04L25/08
    • A pseudo-differential signaling system uses a plurality of signal lines and a single, common reference voltage. Signal line voltages are interpreted only in comparison to the reference line voltage. Within a receiving circuit, the reference line is buffered prior to its distribution to multiple comparators. The system utilizes an active buffer having a bandwidth that is significantly greater than the resonant input frequency of the receiving circuit. In an alternative embodiment, the signal lines are also buffered. In this embodiment, the buffers are implemented with transistor-based source-followers. The buffer associated with the reference line has a larger current capacity than the buffers associated with the signal lines. In yet another embodiment, a comparator produces a correction signal that is equal to the noise present on the signal lines. This noise is then subtracted from the signal voltages.
    • 伪差分信号系统使用多个信号线和单个公共参考电压。 信号线电压仅与参考线电压相比较。 在接收电路内,参考线在分配给多个比较器之前被缓冲。 该系统利用具有明显大于接收电路的谐振输入频率的带宽的有源缓冲器。 在替代实施例中,信号线也被缓冲。 在本实施例中,缓冲器由基于晶体管的源极跟随器实现。 与参考线相关联的缓冲器具有比与信号线相关联的缓冲器更大的电流容量。 在另一个实施例中,比较器产生等于信号线上存在的噪声的校正信号。 然后从信号电压中减去该噪声。