Agere Systems Inc.

James Gary Norman

Samir Chaudhry

Paul Arthur Layman

J Ross Thomson

A method for predetermining the initial state of the memory cells of a static random access memory such that when the memory is powered up the predetermined initial states are attained. The initial states can be predetermined by modifying one or more physical or operational parameters of the MOSFETS comprising the memory cells.

Method for defining the initial state of static random access memory

A memory array operates as an alpha particle detector. A predetermined state is stored in each memory storage location. The operating voltage of the memory array is established at a voltage where the stored values are relatively stable and not subject to change except as a result of alpha particle impingement. Impinging alpha particles are detected by the state changes they cause in the memory storage locations.

Apparatus and method for detecting alpha particles

A method of identifying an integrated circuit device based on the initial state of certain memory cells within a memory array of the integrated circuit device. For many cells in the memory array the initial state is relatively consistent at each power-up, due to mismatches between the transistors that form each memory cell. Thus these consistent initial states provide a signature of the memory array and the integrated circuit device.

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Orlando, FL, United States of America

James Gary Norman