Abstract: A sense amplifier and a method for determining the values of the voltages on a bit-line pair are provided. The sense amplifier comprises a first delay chain and a second delay chain. The first delay chain is electrically connected to a bit line and configured for receiving a clock signal and a first voltage on the bit line, so as to delay the clock signal according to the first voltage and to generate a first delay signal accordingly. The second delay chain is electrically connected to a complementary bit line and configured for receiving the clock signal and a second voltage on the complementary bit line, so as to delay the clock signal according to the second voltage and to generate a second delay signal accordingly.