Patent ID: 7999591

Claim:
A deskew system comprising: a first voltage control delay configured to receive a data signal and generate N-numbered delayed data signals by delaying a phase of the data signal in units of 90/N, where N is a natural number that is not less than 1; a second voltage control delay configured to receive a clock and generate N-numbered delayed clocks by delaying a phase of the clock in units of 90/N; and a skew compensation control unit configured to generate a plurality of deskew control signals to compensate for skew between the data signal and the clock based on the N-numbered delayed data signals and the N-numbered delayed clocks, wherein the skew compensation control unit includes, a sampling unit configured to sample the data signal at a first edge of each of the clock and the N-numbered delayed clocks, sample one of the N-numbered delayed data signals at a second edge of each of the clock and the N-numbered delayed clocks, and generate a sampling result output, and a deskew control unit configured to receive the sampling result output, determine an amount of the skew between the data signal and the clock based on the sampling result and generate a plurality of deskew control signals to compensate for the skew between the data signal and the clock based on the amount of the skew.