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US 8,330,160 B2Granted
Random number generating device
AssigneeKabushiki Kaisha Toshiba
InventorsTetsufumi Tanamoto, Shinobu Fujita
Life of this patent
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Abstract
The objective is to provide a random number generating device having a smaller circuit size and a smaller value of output bias. The random number generating device includes a pair of first and second current paths arranged in parallel with each other, and a pair of first and second fine particles, which can mutually exchange charges, and are located in the vicinity of the first and second current paths.
Claims5
A random number generating device comprising:
- a pair of first and second current paths arranged in parallel with each other;
- an insulating layer formed between the first and second current paths;
- a nanoparticle having a diameter of 1 μm or less and provided in the insulating layer;
- 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,
- a first capacitor being formed of the first current path, the insulating layer, and the nanoparticle, a second capacitor being formed of the second current path, the insulating layer and the nanoparticle, and a capacitance of at least one of the first and second capacitors being 1 nF or less.
3 more elements
Dependencies are inferred from the claim text.