Hui Fang Lu

US Patent:

7149956, Dec 12, 2006

Filed:

Feb 9, 2004

Appl. No.:

10/708095

Inventors:

Hui Lu - Union City CA, US

Assignee:

Pericom Semiconductor Corp. - San Jose CA

International Classification:

H03M 7/16

US Classification:

714809, 341 97, 341 98, 377 34, 714819

Abstract:

An L-bit gray-code input value can change by more N bits at a time. The lower N bits of the input are stored as a received least-significant-bits (LSB) while the upper bits are stored as a received most-significant-bits (MSB). A stored register holds the corrected, stored MSB and LSB for use by the receiver. When the received and stored MSB's mis-match, the new MSB is stored and the stored LSB is generated so that the stored register contains the smallest possible value with the new MSB. When the received and stored MSB's match, the full L bits are compared. When the received word is larger than the stored word, the largest mis-matching bit in the LSB is found, and bits above this are copied from the received LSB to the stored register, while lower bits are generated to produce the lowest value. Repeating the process converges the result.