| 摘要 |
Embodiments of the invention relate to methods and circuits for controlling the sampling phase of a signal that is to be regenerated by sampling, particularly a serial communication signal, having method steps or means for oversampling the signal in order to ascertain samples of the signal during predetermined sampling phases, for determining differential errors between the samples during different instances of the predetermined sampling phases, for determining a differential error rate between the samples to at least one first and at least one second sampling phase on the basis of the ascertained differential errors, and for comparing at least two differential error rates based on at least two different sampling phase pairs in order to ascertain a decision concerning which of the predetermined sampling phases can be selected as a reference sampling phase for correctly regenerating the signal. |
| 主权项 |
1. A method for controlling the sampling phase of a signal that is to be regenerated by sampling, comprising:
performing n-fold oversampling of the signal with n≧3, wherein n is an integer, in order to obtain n samples A(i) for n sampling phases AP(i) per period duration T of the signal with i=0, 1, . . . n−1; calculating differential errors Delta(i, i+m)=A(i+m)−A(i) between at least two respective samples A(i+m) and A(i) for at least two different i from i=0, 1, . . . n−2 and at least one m with m≧1 with m+i≦n; summing the differential errors Delta(i, i+m) for the at least two different i from i=0, 1, . . . n−2 and the at least one m with m≧1 with m+i≦n; calculating moving differential error averages SumDelta(i, i+m) of the summed differential errors Delta(i, i+m) for the at least two different i from i=0, 1, . . . n−2 and the at least one m with m≧1 with m+i≦n over a predetermined number of sampling periods T′; comparing at least two moving differential error averages SumDelta(i, i+m) of the summed differential errors Delta(i, i+m) for the at least two different i from i=0, 1, . . . n−2 and the at least one m with m≧1 with m+i≦n, in order to obtain at least one comparison result; and using the at least one comparison result to decide which of the n sampling phases AP(i) the samples have the least discrepancy from an actual signal value on average for selection as a reference sampling phase. |
