A 3/4/5/6X Oversampling Circuit for 200 Mb/s to 1000 Mb/s Serial Interfaces Application Note (XAPP572) - This oversampling module performs 3/4/5/6X oversampling. The oversampling ratio is selectable during operation to facilitate multi-rate applications. It is designed to accept 20 bits of oversampled data and to output 10 bits of extracted data.