# ELECTRICAL NOISE OR RANDOM WAVE GENERATOR

## Subclass of:

## 331 - Oscillators

### Patent class list (only not empty are listed)

#### Deeper subclasses:

Class / Patent application number | Description | Number of patent applications / Date published |
---|---|---|

331078000 | ELECTRICAL NOISE OR RANDOM WAVE GENERATOR | 8 |

20090302955 | Frequency jitter generation circuit - A frequency jitter generation circuit having a voltage generator and an oscillator circuit is provided. The voltage generator receives an input voltage and converts the input voltage into an upper reference voltage output to the oscillator circuit. Voltage level of the upper reference voltage is varying. The oscillator circuit is coupled with the voltage generator. Voltage level of a reference voltage in the oscillator circuit is oscillated between the upper reference voltage and a lower reference voltage to generate a frequency signal with a jitter based on the variation of the upper reference voltage. | 12-10-2009 |

20130162359 | FREQUENCY JITTER CIRCUIT AND METHOD - An oscillator generates a clock signal according to a voltage, a current and a capacitance, and a frequency jitter circuit and method use a random number to modulate the voltage, the current or the capacitance, or a count value to modulate the capacitance, to jitter the frequency of the clock signal. | 06-27-2013 |

20130099872 | CHAOTIC OSCILLATOR-BASED RANDOM NUMBER GENERATION - Chaotic oscillator-based random number generation is described. In an example, a circuit includes a negative differential resistance (NDR) device to receive an alternating current (AC) bias. The circuit further includes a capacitance in parallel with the NDR device, the capacitance having a value such that, in response to a direct current (DC) bias applied to the NDR device and the capacitance, a voltage across the capacitance oscillates with a chaotic period. The circuit further includes a random number generator to generate random numbers using samples of the voltage across the capacitance. | 04-25-2013 |

20080258825 | Digital Component Deterministic Pseudo Random Clock and Noise Source Device Based on a Random Frequency Modulated Oscillator - Random number generators are used for entertainment in gambling, lotteries and video gaming devices. True Random Number Generators, as are now currently defined, must be actuated by a physical noise source, typically based on the uncertainty of the phase differences of a stable and an unstable autonomous oscillator. In this invention an autonomous random frequency modulated oscillator driven by a self contained pseudo-random number generator outputs three loosely correlated random binary streams. Included in the invention is a hardware method for proving wandering phase differences and also the existence of a colored random distribution of concatenated nibbles. | 10-23-2008 |

20120056683 | FREQUENCY JITTER CIRCUIT AND METHOD - An oscillator generates a clock signal according to a voltage, a current and a capacitance, and a frequency jitter circuit and method use a random number to modulate the voltage, the current or the capacitance, or a count value to modulate the capacitance, to jitter the frequency of the clock signal. | 03-08-2012 |

20130169370 | FREQUENCY JITTER CIRCUIT AND METHOD - An oscillator generates a clock signal according to a voltage, a current and a capacitance, and a frequency jitter circuit and method use a random number to modulate the voltage, the current or the capacitance, or a count value to modulate the capacitance, to jitter the frequency of the clock signal. | 07-04-2013 |

20120019329 | Frequency-jittering apparatuses, frequency-jittering methods and power management devices - A frequency-jittering apparatuses includes an oscillator and a frequency control circuit. The oscillator generates a signal. When the magnitude of the signal exceeds a magnitude of a reference signal, the oscillator operates substantially in a first state; and when the magnitude of the signal is lower than the magnitude of the reference signal, the oscillator operates substantially in a second state different from the first one. The frequency control circuit varies the reference signal to change the frequency of the signal output from the oscillator. | 01-26-2012 |

20140028404 | RANDOM NUMBER GENERATING DEVICE - Provided is a random number generating device capable of generating highly irregular random numbers with a simple configuration. The random number generating device includes: a receiving unit including a receiving mechanism configured to receive, in a contactless manner, energy transmitted from a transmitting unit, the receiving unit being configured to convert the energy received by the receiving mechanism into a reception voltage; a voltage controlled oscillator configured to output an oscillating output signal based on the reception voltage; and a pseudorandom number generator configured to generate pseudorandom numbers varying in accordance with an oscillation frequency of the output signal from the voltage controlled oscillator. | 01-30-2014 |