Clock signal generators include an integrated circuit chip having a PLL-based or DLL-based clock driver therein. The clock driver is configured to support generation of a plurality of clock signals having different frequencies in a range between 1 and 1/N times a frequency of an internal clock signal...http://www.google.com/patents/US6977539?utm_source=gb-gplus-sharePatent US6977539 - Clock signal generators having programmable full-period clock skew control and methods of generating clock signals having programmable skews
