Patent ID: 8570817

Claim:
A data input device for writing data into a memory device, comprising: a combinational logic circuit for receiving an external data strobe signal and for outputting a first data strobe signal and a second data strobe signal in response to the external data strobe signal; a buffer for receiving the data and for outputting internal data to a flip-flop unit; and the flip-flop unit for storing the internal data in synchronization with the first data strobe signal and for outputting the stored data in synchronization with the second data strobe signal; wherein the first data strobe signal is generated by delaying the external data strobe signal for a first predetermined time; wherein a last falling edge of the second data strobe signal is generated by delaying a last falling edge of the first data strobe signal for a second predetermined time, and a last rising edge of the second data strobe signal, which follows the last falling edge of the second strobe signal, is generated by delaying the last falling edge of the second data strobe signal for a third predetermined time; and wherein the last rising edge of the second data strobe signal is generated prior to onset of a postamble ringing on the external data strobe signal.