Determining history state of data based on state of...

Details Determining history state of data based on state of... Determining history state of data based on state of...

2006-04-12

2008-12-02

Elms, Richard (Department: 2824)

Static information storage and retrieval

Read/write circuit

Testing

C365S174000, C365S177000

Reexamination Certificate

active

07460422

ABSTRACT:
A system for determining a history state of data in a data retaining device are disclosed. A state of a partially-depleted silicon-on-insulator (PD SOI) device coupled to a data retaining device is measured to indicate a body voltage of the PD SOI device. The body voltage of the PD SOI device may indicate, among others, how long the PD SOI device has been idling, which indirectly indicates how long data in the data retaining device has not been accessed. As such, the current invention may be used efficiently with, e.g., a cache replacement algorithm in a management of the data retaining device.

REFERENCES:
patent: 7103522 (2006-09-01), Shepard
patent: 2005/0040881 (2005-02-01), Brown et al.
patent: 2005/0248976 (2005-11-01), Huang et al.

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