Apparatus for tuning a RAS active time in a memory device

Details Apparatus for tuning a RAS active time in a memory device Apparatus for tuning a RAS active time in a memory device

2007-02-13

2007-02-13

Phan, Trong (Department: 2827)

Static information storage and retrieval

Addressing

Sync/clocking

C365S194000

Reexamination Certificate

active

10941804

ABSTRACT:
An apparatus can constantly tune the RAS active time by comparing the RAS active time generated in synchronization with a clock signal with the RAS active signal generated through an inverter delay circuit and adjusting a delay time by feeding back the result of comparison. The apparatus includes a clock sync time, an inverter delay time generating unit, a delay correcting unit, a comparing unit, and a delay control unit. The comparing unit compares signals outputted from the clock sync time generating unit and the delay correcting unit and outputs a signal corresponding to a result of comparison, and the delay control unit generates and provides a control signal corresponding to the output signal of the comparing unit to the delay correcting unit.

REFERENCES:
patent: 5301278 (1994-04-01), Bowater et al.
patent: 5751655 (1998-05-01), Yamazaki et al.
patent: 6667933 (2003-12-01), Tomita

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