Flash memory card

Details Flash memory card Flash memory card

Filed on

2006-12-12

Date issued

2006-12-12

Examiner

Elms, Richard (Department: 2824)

Patent Class

Static information storage and retrieval

SubClass

Floating gate

SubSubClass

Particular biasing

Other Related Categories

C365S185110

Type

Reexamination Certificate

Status

active

Patent number

07149127

Description

ABSTRACT:
A flash memory card comprises a flash memory and a controller. The flash memory stores data. The controller detects frequency variation of an external clock signal inputted from a host to generate an internal clock signal. The controller controls the flash memory in response to the internal clock signal. The controller includes a clock-frequency control unit and a clock generator. The clock-frequency control unit detects frequency variation of the external clock signal to generate a detection signal. The clock generator receives the detection signal to generate the internal clock signal. A frequency of the internal clock signal varies corresponding to the frequency variation of the external clock signal.

REFERENCES:
patent: 5550489 (1996-08-01), Raab
patent: 6456562 (2002-09-01), Abedifard
patent: 6944089 (2005-09-01), Jeong et al.
patent: 2004/0128425 (2004-07-01), Zitlaw et al.
patent: 2005/0253631 (2005-11-01), Kim et al.
patent: 2000-123570 (2000-04-01), None

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