Patent ID: 7143258

Claim:
A method of masking a ringing in a DQS signal having a finite number of pulses in a memory device including a DDR SDRAM, the method comprising the steps of: (a) receiving a DQS signal by a DQS buffer for use within the DDR SDRAM and outputting to a DQS latch; (b) receiving data having a plurality of data bursts by a data input buffer and outputting to a data input latch; (c) generating a first signal in synchronization with a rising edge of a first pulse of the DQS signal and a second signal in synchronization with a falling edge of the first pulse of the DQS signal, wherein the first and second signals are generated by the DQS latch and outputted to the data Input latch; (d) storing in the data input latch a first data burst outputted from the data input buffer in synchronization with a rising edge of the first signal; (e) storing in the data input latch a second data out outputted from the data input buffer In synchronization with a rising edge of the second signal; (f) transferring the first and second data stored in the data input latch to a data input/output detection amplifier (Din IOSA) in synchronization with one of data input strobe pulses; and (g) determining a point in time at which a burst length of the data ends and controlling the operations of the DQS buffer to enable or disable the generation of the first and second signals after determining the point in time at which the burst length of the data ends.