True random number generator and oscillator
First Claim
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1. A random number generator comprising:
- an oscillator configured to output signals which oscillate a random number of times due to noise after initialization;
a phase detector configured to receive the output signals and determine whether phases of the output signals have been inverted with respect to each other; and
a counter configured to count the number of oscillations of the output signals until the phases of the output signals are inverted with respect to each other,wherein the counted number of oscillations is used as a seed for generating a random number.
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Abstract
Provided are a true random number generator and an oscillator. The random number generator includes an oscillator configured to output signals and oscillate a random number of times until phases of the signals being output are inverted with respect to each other after initialization, and a counter configured to count the number of oscillations. The counted number of oscillations is used as a seed for generating a random number.
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13 Claims
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1. A random number generator comprising:
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an oscillator configured to output signals which oscillate a random number of times due to noise after initialization; a phase detector configured to receive the output signals and determine whether phases of the output signals have been inverted with respect to each other; and a counter configured to count the number of oscillations of the output signals until the phases of the output signals are inverted with respect to each other, wherein the counted number of oscillations is used as a seed for generating a random number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An oscillator for generating a random number, wherein unit cells are cascaded to oscillate and individually include a pair of output circuits, and each of the pair of output circuits includes:
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a P-type metal oxide semiconductor (PMOS) transistor and an N-type metal oxide semiconductor (NMOS) transistor connected between a driving voltage and a common node and having gate electrodes connected to each other to receive an input signal, wherein the common nodes of the pair of output circuits are connected to form a single node; and input signal degrading resistances connected between a drain electrode of the PMOS transistor and a drain electrode of the NMOS transistor and configured to reduce influence of the input signal on an output signal and increase influence of noise. - View Dependent Claims (10, 11, 12, 13)
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Specification