SKEW CORRECTING APPARATUS,申请号WO2006JP323483-传众专利搜索

SKEW CORRECTING APPARATUS

申请公布号：WO2007083443(A1)

申请号：WO2006JP323483

申请日期：2006.11.24

申请公布日期：2007.07.26

申请人：

MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;NISHIKAWA, KAORI;YOSHIKAWA, TAKEFUMI

发明人：NISHIKAWA, KAORI;YOSHIKAWA, TAKEFUMI

分类号：H03K5/13;G06F1/10

主分类号：H03K5/13

摘要：<p>A skew correcting apparatus comprises a transition detector (10), when detecting a transition of an input data signal, provides a pulse signal; a variable delay line (20) that generates a first delayed data signal obtained by delaying the input data signal by a variable delay amount (VD); a fixed delay line (30) that generates a second delayed data signal obtained by further delaying the first delayed data signal by a fixed delay amount (FD); a phase comparator (50) that compares the transition of the second delayed data signal with the phase of a clock signal; and a control part (60) that controls, based on a result of the comparison, the delay amount (VD) of the variable delay line (20). When the transition of the second delayed data signal advances relative to a clock edge of the clock signal, the control part (60) outputs a first control signal for increasing the delay amount (VD). When the transition of the second delayed data signal lags behind a clock edge of the clock signal, the control part (60) outputs a second control signal for reducing the delay amount (VD).</p>