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| Number | Title | Issue Date |
| 8131789 | True random number generator True random number generation circuitry utilizes a pair of oscillators driving a pair of linear feedback shift registers, with their output being combined to generate random numbers. At least one of the oscillators is programmable with a variable frequency. One embo... | 03/06/2012 |
| 8073889 | Seed generating circuit, random number generating circuit, semiconductor integrated circuit, IC card, and information terminal equipment A random number generating circuit comprises: the seed generating circuit which generates a seed; and a pseudo random number circuit which generates pseudo random numbers based on the seed generated by the seed generating circuit. The seed generating circuit has: an... | 12/06/2011 |
| 8073888 | Random number generator and random number generating method thereof A random number generator and a random number generating method thereof are provided. The random number generator includes a signal generating unit and a sampling unit. The signal generating unit is adapted for memorizing a status of a noise generated during a trans... | 12/06/2011 |
| 8024386 | Apparatus and method for generating random number and data interaction system thereof Embodiments of the present invention provide a random number generating apparatus, including a first level sampling module and a second level sampling module. The first level sampling module includes a first oscillator, a second oscillator and a first sampler capabl... | 09/20/2011 |
| 7958175 | Method and device for generating a random number in a USB (universal serial bus) peripheral A method for generating a random number, comprising steps of receiving a data transmission binary signal subjected to phase jitter, generating several oscillator signals substantially of a same average frequency and having distinct respective phases, sampling a stat... | 06/07/2011 |
| 7945608 | Method and apparatus for generating an initial value for a pseudo-random number generator Apparatus and method for generating an initial value for a pseudo-random number generator, with an oscillator configured to generate an oscillator signal; and a generator configured to generate the initial value based on the oscillator signal at least during part of... | 05/17/2011 |
| 7904494 | Random number generator with random sampling In a random number generator, a first converter converts a first analog noise signal into a random digital clock signal and a second converter samples a second analog noise signal asynchronous to the first analog noise signal in response to the random digital clock ... | 03/08/2011 |
| 7890561 | Random number generator A random number generator, a method, and a computer program product are provided for producing a random number seed. Each oscillator within an array of oscillators operates at a different frequency. The operating frequencies of each oscillator are not harmonically r... | 02/15/2011 |
| 7797361 | System and method for generating random numbers using parity feedback A method for generating random numbers in which oscillating digital output signals of unequal or equal periodicity are generated by at least two ring oscillators, an external parity signal representing a logical state being generated when an odd number of the output... | 09/14/2010 |
| 7516169 | Generating random data A method for generating random data, the method comprising repeatedly performing a series of operations, and the series of operations comprising processing a seed value to generate a resulting value for use as the seed value in a subsequent performance of the series... | 04/07/2009 |
| 7424500 | Random number generator with ring oscillation circuit A random number generator includes a ring oscillator having an EX-OR gate and four inverters together forming a loop. This loop enters stable state for a start signal having the low level and oscillates for the start signal having the high level. When the start sign... | 09/09/2008 |
| 7395288 | Seed generating circuit, random number generating circuit, semiconductor integrated circuit, IC card, and information terminal equipment A random number generating circuit comprises: the seed generating circuit which generates a seed; and a pseudo random number circuit which generates pseudo random numbers based on the seed generated by the seed generating circuit. The seed generating circuit has: an... | 07/01/2008 |
| 7389316 | Method and apparatus for true random number generation Method and apparatus for true random number generation is described. One aspect of the invention relates to a digital logic circuit that includes N logic gates, where N is an integer greater than two. For each logic gate in the N logic gates: a first input terminal ... | 06/17/2008 |
| 7376687 | Pseudo-random number generator A pseudo-random number generator comprises a linear feedback register for generating pseudo-random numbers; and a signal generator for generating a shift clock for operating a linear feedback register and predetermined input data. The linear feedback register has a ... | 05/20/2008 |
| 7356551 | Method and apparatus of retaining maximum speed of flip-flop metastability based random number generators An apparatus, system and method for retaining the maximum speed of flip-flop metastability based random number generators includes a fixed delay unit having an input for receiving a common signal from a digital signal generator, and a variable delay unit having an i... | 04/08/2008 |
| 7325021 | VLSI implementation of metastability-based random number generator using delay ladders A random number generator includes a chain of pairs of D-type flip-flops 205, 215 . . . having D and L inputs, a chain of substantially identical cascaded upper buffers 210,220 . . . each having a predetermined delay d1 and respective output... | 01/29/2008 |
| 7315874 | Electronic circuit for random number generation A random number generator includes a flip-flop, and a pair of independent free-running oscillators having a respective set of 4 switches controlled with a non-inverted and inverted output of the flip-flop. An output from each of the oscillators is fed back to their ... | 01/01/2008 |
| 7313491 | Method and apparatus for high-precision measurement of frequency A method and apparatus for measuring the frequency of a cyclically-repeating electrical signal by: passing the electrical signal through a network of sequentially-activated gates, in which the first gate detects the leading edge of each cycle of the electrical signa... | 12/25/2007 |
| 7310604 | Statistical sound event modeling system and methods Complex sound events are created by generating multiple different kinds of simpler sounds with randomly varying repetition rates. The average repetition rate can also be variable. The values of sound parameters such as wave selection, pitch distribution, pan distrib... | 12/18/2007 |
| 7302458 | Method and apparatus for choosing a combination of logic for generating random numbers using a difference signal An apparatus and method for random number generation, including a plurality of cross-connected latches 210, 215, 220, 225, providing at least two latch outputs (latch1, latch0) is provided. A first XOR 261 receives the at least two latch ... | 11/27/2007 |
| 7302456 | Stochastic processor and stochastic computer using the same A stochastic processor and a stochastic computer comprises a fluctuation generator configured to generate and output analog quantity having fluctuation comprised of chaos of tent mapping, a mixer configured to output a fluctuation superposed signal with the analog q... | 11/27/2007 |
| 7277203 | Method of improving start-up behavior for color error diffusion digital half-toning A method for initializing a printing system using error diffusion is discussed. In application of the invention to color printing systems, the method initializes a first error buffer with a first set of seed values and then initializes at least one other error buffe... | 10/02/2007 |
| 7269258 | Cryptographic key, encryption device, encryption/decryption device, cryptographic key management device, and decryption device A cryptographic key 1 constituted to be freely attachable and detachable to/from a personal computer 2 encrypting and decrypting data by use of a cipher key includes: a pseudo random number generator 14 for generating a pseudo random number of a... | 09/11/2007 |
| 7266575 | Random number generator which can generate a random number based on an uniform distribution A random number generator includes a random pulse generator, a scrambler and a counter. The random pulse generator generates a plurality of random pulses. The scrambler generates an initial value. The counter generates a random number code based on the initial value... | 09/04/2007 |
| 7243117 | Random number generator and probability generator A random number generator includes a flip-flop in which an output state (0 or 1) becomes definite according to a phase difference between signals inputted to two input units, a delay unit for producing the phase difference in these two input signals, and a feedback ... | 07/10/2007 |
| 7233965 | Continuous random number generation method and apparatus A method and apparatus for generating continuous random numbers. The method includes generating a value for a continuous random number using a continuous random number function with a plurality of iterations responsive to at least an input signal different from a re... | 06/19/2007 |
| 7233212 | Oscillator array with row and column control A circuit topology which can be used to create an array of individually tuned oscillators operating at different frequencies determined by common control inputs and an easily managed variation in design dimensions of several components is provided. An array of oscil... | 06/19/2007 |
| 7206797 | Random number slip and swap generators A microelectronic apparatus and method for generating random binary words including at least one clocked pseudorandom binary number sequence generator normally operative to generate a cyclic output sequence of binary numbers, each number including a string of binary... | 04/17/2007 |
| 7193481 | Apparatus for providing a jittered clock signal and apparatus for providing a random bit An apparatus for providing a jittered clock signal has a reverse-biased diode. The reversed-biased diode has a leakage current which decreases a reverse voltage on the diode, time-dependent on a shot-noise of the leakage current. The apparatus for providing a jitter... | 03/20/2007 |
| 7188131 | Random number generator A generator of random numbers by a flip-flop having a data input receiving a first signal at a first frequency comprised in a predetermined range and the instantaneous value of which is conditioned by a disturbing signal, and having a clock input receiving a second ... | 03/06/2007 |
| 7177888 | Programmable random bit source A method of producing a uniform duty cycle output from a random bit source. The method includes testing the duty cycle of said random bit source; varying the output voltage of a voltage source if the duty cycle is not substantially fifty percent; and iteratively alt... | 02/13/2007 |
| 7143294 | Apparatus and method for secure field upgradability with unpredictable ciphertext An apparatus and method for enabling functionality of a component, wherein the apparatus includes a random number generating module for generating a random number, and a hash function module in communication with the random number generating module. A host is provid... | 11/28/2006 |
| 7139397 | Hybrid architecture for realizing a random numbers generator A hybrid architecture for realizing a random numbers generator comprising a digital circuitry portion able to provide for a random bytes sequence as well as an analog circuitry portion able to provide a seed of the true random type is described. ... | 11/21/2006 |
| 7129797 | Wideband Gaussian white noise source A white noise generator comprising a MOSFET operated in its linear region and having zero source-drain DC bias current. This is achieved by connecting the source or drain terminal of the MOSFET to a gate terminal of a MOSFET amplifier that may be implemented as a mu... | 10/31/2006 |
| 7113966 | Method and apparatus for decorrelating a random number generator using a pseudo-random sequence A method and apparatus are disclosed for generating random numbers using the meta-stable behavior of flip-flops. A flip-flop is clocked with an input that deliberately violates the setup or hold times (or both) of the flip-flop to ensure meta-stable behavior. When a... | 09/26/2006 |
| 7099906 | Random bit sequence generator A random-bit sequence generator includes a biasing circuit, a source of a noisy voltage signal biased by the biasing circuit, an amplification stage generating an amplified signal representative of the sole non-zero-frequency (AC) component of the noisy voltage sign... | 08/29/2006 |
| 7058674 | Random number data generator A random number data generator includes a plurality of oscillation units and an AND circuit for outputting random number data produced in at least one oscillation unit when each of the entire oscillation units has oscillated a predetermined number of times, wherein ... | 06/06/2006 |
| 7007051 | Devices containing logic circuits to generate random signals A device including an oscillator circuit having semiconducting logic elements and switching means for controlling warming and cooling of the circuit and, in that process, causing it to heat or cool in order to generate a random signal at the output of the logic elem... | 02/28/2006 |
| 6961426 | Cascaded stream cipher A pseudo-random number generating circuit and method, comprising: a plurality of pseudo-random number generator (PRNG) units combined in a cascade structure of several layers to produce a pseudo-random output stream, the PRNG units of any given layer running more sl... | 11/01/2005 |
| 6956873 | Arrangement for deriving a local clock in a packet cable telephony modem A broadband terminal interface unit for use in an HFC communication network includes a phase-locked loop for providing a smooth transition between a CMTS-provided “national” clock and a local clock when the CMTS clock is lost (or before it is required). By contr... | 10/18/2005 |
