Jacobson Holman, PLLC
Data strobe buffer in SDRAM
 A data strobe buffer in SDRAM is disclosed. The data strobe buffer for a synchronous dynamic read only memory (SDRAM), comprising: a first dynamic buffer generating a first pulse at a rising edge of a data strobe signal; a second dynamic buffer generating a second pulse at a falling edge of the data strobe signal; and a block for generating an enable signal which is enabled in a range between a rising edge of an external clock signal and a logic high state of the second pulse, and providing the second dynamic buffer with the enable signal. The data strobe buffer ensures a minimum value of tDQSS parameter in DDR SDRAM even if speed of the chip increases or operation condition of the chip becomes tight, thereby preventing the data strobe buffer from being misoperated due to the damping and the fluctuation of the data strobe signal. 
Hyundai Electronics Industries Co., Ltd.
G G G G
G11C G11C G11C G11C
inventional inventional inventional inventional
Seung-Hyun Jong-Hee
Yi Han