US 2006/0139080 A1 · Data strobe signal generating circuit and data strobe signal generating method

Abstract

Provided is a data strobe signal generating circuit capable of guaranteeing a preamble time (tRPRE). The data strobe signal generating circuit includes: a strobe output driver for outputting a data strobe signal to an outside of a semiconductor device so as to indicate synchronization between an external device and data input/output; and a preamble part for maintaining an output of the strobe output driver to a predetermined logic level during a predetermined delay time from an enabling timing of the preamble signal. Accordingly, it is possible to guarantee the stable operation of the semiconductor memory even when PVT (processor, operating voltage, operating temperature) changes.

Claims13

Dependent claims

A data strobe signal generating circuit for generating a preamble signal for guaranteeing a predetermined preamble period, comprising:

a strobe output driver for outputting a data strobe signal to an outside of a semiconductor device so as to indicate synchronization between an external device and data input/output;
and
a preamble part for maintaining an output of the strobe output driver to a predetermined logic level during a predetermined delay time from an enabling timing of the preamble signal.

Dependencies are inferred from the claim text.

Facts

Application

11/066,010Filed 24 Feb 2005

Priority

KR 2004-011355528 Dec 2004

Published

29 Jun 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

G11C 7/22
Arrangements for writing information into, or reading information out from, a digital store: read-write [R-W] timing or clocking circuits;…
G11C 7/1051
Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers: data output circuits, e.g. read-out amplifiers,…
G11C 7/1057
Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits: data output…
G11C 7/1066
Data output circuits, e.g. read-out amplifiers, data output buffers, data output registers, data output level conversion circuits: output…

Data strobe signal generating circuit and data strobe signal generating method

Life of this patent

Data strobe signal generating circuit and data strobe signal generating method

Life of this patent

Abstract

Claims13