Phase detection method, memory control method, and related...

Details Phase detection method, memory control method, and related... Phase detection method, memory control method, and related...

2006-12-29

2008-11-11

Pham, Ly D (Department: 2827)

Static information storage and retrieval

Read/write circuit

Signals

C365S194000, C365S230080, C365S233100, C365S233500, C327S002000

Reexamination Certificate

active

07450443

ABSTRACT:
A phase detection method for detecting a phase difference between a data strobe signal and a clock signal, includes: latching the clock signal according to the data strobe signal to generate a phase lead/lag detection result; delaying the data strobe signal to generate a plurality of delayed data strobe signals; latching the clock signal according to the delayed data strobe signals to generate a plurality of phase detection results corresponding to the delayed data strobe signals, respectively; and if the phase lead/lag detection result indicates that the data strobe signal leads the clock signal, utilizing the phase detection results to represent the phase difference between the data strobe signal and the clock signal. A memory control method and a memory control circuit respectively corresponding to the phase detection method are further provided.

REFERENCES:
patent: 7245553 (2007-07-01), Lin et al.
patent: 2006/0140022 (2006-06-01), Lee
patent: 2007/0257717 (2007-11-01), Yoon

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