Contention-Based Random-Number Generator
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United States of America Patent
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Issued Date -
Feb 22, 2024
app pub date -
Aug 22, 2022
filing date -
Aug 22, 2022
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Abstract
An electronic circuit for Random Number Generation (RNG) includes multiple inverters, a contention-current generator, and digitization circuitry. The multiple inverters are connected to one another in a ring and configured to generate an oscillating signal. The contention-current generator is connected to a node at which an output of an inverter of the ring drives an input of a subsequent inverter of the ring with a drive current. The contention-current generator includes at least a buffer configured to drive the node, at least while a voltage at the node transitions between opposite logic states, with a contention current that opposes the drive current and is weaker than the drive current. The digitization circuitry is configured to generate a sequence of random numbers by sampling the oscillating signal generated in the ring.
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