Patent ID: 9722590
Date: 2017-08-01
CPC Classifications: H03K,H03L,H04L

Claim:
1. A skew adjustment circuit comprising: a plurality of latch circuits for taking in an input signal in response to a plurality of first clock signals; a phase adjustment circuit for adjusting phases of a plurality of second clock signals, based on the plurality of second clock signals generated based on a reference clock signal and output signals from the plurality of latch circuits; a phase interval detection circuit for detecting a phase interval between the plurality of first clock signals, based on a reference value; and a phase interval adjustment circuit for performing adjustment such that phase intervals become equal to each other between the plurality of second clock signals adjusted by the phase adjustment circuit, based on a skew adjustment signal from the phase interval detection circuit, wherein the reference value in the phase interval detection circuit is obtained by calibration, and the plurality of second clock signals adjusted by the phase interval adjustment circuit is provided as the plurality of first clock signals to the plurality of latch circuits.