| 摘要 |
A baud rate sampling receiver, for reducing signal overshoot and improving equalization of a communications channel. The receiver filters an input signal, samples the filter output signal at the baud rate, continuously monitors the filter output signal for overshoot using a latching comparator circuit, and controls filter parameters based upon the sampling and monitoring using a filter control. The latching comparator circuit includes a positive latching threshold comparator circuit and a negative latching threshold comparator circuit. Each of these comparator circuits provides a threshold control bit to the filter control in response to a detection of signal overshoot. While the filter control also receives information about the filtered output signal from a sampling circuit, the threshold control bits indicate to the adaptive filter control immediately, rather than at the next sample point, when signal overshoot is present. The filter control responds by appropriately adjusting filter parameters such as high frequency boost. |
