A quadrature signal corrector (QSC) with high accuracy and fast correction for memory interfaces is presented. The QSC includes an adaptive delay gain controller. The adaptive delay gain controller adjusts each delay gain of four digitally controlled delay lines separately depending on each skew between the quadrature clocks to shorten correction time. The adaptive delay gain controller relaxes the trade-off between correction time and residual skew through this operation. To validate the effectiveness of our QSC in memory interfaces, a quarter-rate single-ended 1-tap decision feedback equalizer (DFE) with the QSC was fabricated in a 65nm CMOS process.