Patent ID: 9118306
Filing Date: 2015-08-25
Classification: H03K

Abstract:
1. An oversampling method for data signal, comprising; oversampling a data strobe signal according to a plurality of sampling phases to generate a plurality of first sampling results; oversampling a data signal according to the plurality of sampling phases to generate a plurality of second sampling results; performing edge detection on the first sampling results, to obtain at least one first edge position where edges are detected among the first sampling results; performing edge detection on the second sampling results, to find out second edge position where edges are detected among the second sampling results; when the second edge position is obtained, calculating at least one first offset according to the first edge position and the second edge position, which correspond to the same sampling phase, in at least one first edge position and at least one second edge position; when the second edge position is not obtained, using at least one first offset obtained in a previous sampling cycle as the at least one first offset in current sampling cycle; calculating at least one first sampling point according to the at least one first edge position; calculating at least one second sampling point according to the at least one first sampling point and the respectively corresponding first offset; and selecting and outputting at least one of the second sampling results according to the at least one second sampling point.