Random access memory with post-amble data strobe signal noise rejection

A random access memory, comprising:

• means for generating a pulse after a transition in a data strobe signal;
• means for latching data using the data strobe signal;
• and
• means for latching the latched data using the pulse,
• wherein the means for latching the latched data comprises a third latch stage configured to receive the pulse and latch the latched data into the third latch stage.

A method for rejecting post-amble noise on a data strobe signal in a random access memory, comprising:

• generating a pulse before the data strobe signal floats;
• and
• latching data into a latch stage with the pulse to preserve the data,
• wherein generating the pulse comprises:
• receiving a signal at an enable circuit;
• generating an enable signal from a transition on the received signal;
• receiving the enable signal and the data strobe signal at a buffer circuit;
• generating a start of the pulse based on the received enable signal and the received data strobe signal;
• and
• receiving the start of the pulse at the enable circuit.

A random access memory, comprising:

• a first circuit configured to receive a strobe signal and provide pulses in response to transitions in the strobe signal;
• and
• a second circuit configured to receive the strobe signal to latch data into the second circuit in response to the strobe signal, and to receive the pulses to re-latch the latched data into the second circuit after the transitions in the strobe signal,
• wherein the second circuit comprises:
• a first latch configured to latch first data at first transitions in the strobe signal;
• second latches configured to latch the latched first data from the first latch and second data at second transitions in the strobe signal;
• and
• third latches configured to latch in the latched first and second data from the second latches with the pulses after the second transitions.