| US 7,558,813 B2 | ||
| Random number generating device | ||
| Tetsufumi Tanamoto, Kanagawa-Ken (Japan); and Shinobu Fujita, Kanagawa-Ken (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Jun. 20, 2008, as Appl. No. 12/143,104. | ||
| Application 12/143104 is a division of application No. 10/373874, filed on Feb. 27, 2003, granted, now 7,405,423. | ||
| Claims priority of application No. 2002-054153 (JP), filed on Feb. 28, 2002. | ||
| Prior Publication US 2008/0251782 A1, Oct. 16, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06F 7/58 (2006.01); H01L 29/772 (2006.01) | ||
| U.S. Cl. 708—250 [257/314; 257/E29.301] | 5 Claims |
| 1. A random number generating device comprising:
a pair of first and second current paths arranged in parallel with each other; and
a layer including a plurality of trap levels formed between the first and second current paths, the trap levels being able
to mutually exchange charges,
the trap levels being electrically coupled with at least one of the first and second current paths; and
a random number generator configured to include a detection circuit detecting a difference between currents flowing through
the first current path and the second current path, and generate a random number based on the difference.
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