Radiation hardening, detection and protection design methods...

Details Radiation hardening, detection and protection design methods... Radiation hardening, detection and protection design methods...

2005-09-30

2009-11-03

Nguyen, VanThu (Department: 2824)

Static information storage and retrieval

Read/write circuit

Noise suppression

C365S214000, C365S242000, C365S243000

Reexamination Certificate

active

07613058

ABSTRACT:
Radiation hardening, detection and protection design methods are disclosed. An example write drive circuit is disclosed having radiation hardened analog circuitry. A passive transistor is provided to generate a radiation photo-current to offset any net radiation photo-current of the operational circuitry. Using this technique, a radiation hardened reference-mirror control circuit provides a switched write current for setting the logical state of MRAM bits during a radiation event, for instance. A radiation detector and radiation hardened logic gates are further provided for inhibiting the write current when a radiation level is above a predetermined level.

REFERENCES:
patent: 4805148 (1989-02-01), Diehl-Nagle et al.
patent: 6898062 (2005-05-01), Russ et al.
patent: 7006313 (2006-02-01), Ngo
patent: 7236001 (2007-06-01), Fulkerson

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