Patent ID: 6288971
Filing Date: 2001-09-11
Classification: G11C

Abstract:
A synchronous memory device having an apparatus for generating a data strobe signal, the apparatus for generating the data strobe signal comprising:a preamble control means for controlling a preamble state of the data strobe signal in response to a data strobe preamble control signal;at least one pair of pull-up/pull-down signal generating drivers coupled to the preamble control means, each driver within said at least one pair having a first input terminal, a second input terminal and a third input terminal, each driver within said at least one pair for receiving a pipe counter signal at said first input terminal to generate a pull-up signal and a pull-down signal;a common pull-up signal buffering means for buffering the pull-up signal to generate a buffered pull-up signal, wherein the buffered pull-up signal is commonly inputted to said second input terminal of each driver of said at least one pair of pull-up/pull-down signal generating drivers;a common pull-down signal buffering means for buffering the pull-down signal to generate a buffered pull-down signal, wherein the buffered pull-down signal is commonly inputted to said third input terminal of each driver of said at least one pair of pull-up/pull-down signal generating drivers; anda data strobe signal driving means for outputting the data strobe signal in response to the pull-up signals, the pull-down signals and a data strobe enable signal.