Ring oscillator, random number generator including the same, and operation method of random number generator
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United States of America Patent
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Jul 16, 2024
Grant Date -
Jan 19, 2023
app pub date -
Jun 29, 2022
filing date -
Jun 29, 2022
priority date (Note) -
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Abstract
A random number generator includes a ring oscillator, an inversion selecting circuit, and controller. The ring oscillator includes an inverter chain having at least one inverter and generates an output signal. The inversion selecting circuit controlling a phase inverter configured to invert a signal of the inverter chain. The controller is configured to operate the inversion selecting circuit to provide an output of the first phase inverter to the inverter chain during a first operation mode to measure a frequency of the ring oscillator and operate the inversion selecting circuit to not provide the output of the phase inverter during a second operation mode for generating a random number.
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