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| Number | Title | Issue Date |
| 8188798 | Programmable electro-magnetic-interference (EMI) reduction with enhanced noise immunity and process tolerance A frequency dithering circuit reduces emissions that cause Electro-Magnetic Interference (EMI) by spreading the spectrum of a clock. The clock sequences a counter that drives a digital count value to a digital-to-analog converter (DAC). The DAC outputs a sawtooth wa... | 05/29/2012 |
| 8143959 | Jitter generation apparatus, device test system using the same, and jitter generation method A jitter generation apparatus for applying a phase modulation to a PLL is controlled by a control unit so as to output a signal with the desired jitter based on a parameters. When a switching unit is switched to a first state, the control unit controls first and sec... | 03/27/2012 |
| 8089321 | Fluctuation oscillator, fluctuation oscillating system, observation device and control system Four stochastic resonators 20-1 to 20-4 outputting a pulse signal in accordance with a stochastic resonance phenomenon are unidirectionally coupled in a ring-like form to constitute a fluctuation oscillator 10. When a signal output... | 01/03/2012 |
| 8085101 | Spread spectrum clock generation device A spread spectrum controller (20) controls a PLL (10) so that the PLL outputs a spread-spectrum processed clock signal. A loop bandwidth controller (30) controls at least one of a phase detector (11), a loop filter (12), a voltage-... | 12/27/2011 |
| 8072277 | Spread spectrum frequency synthesizer A frequency synthesizer is described illustrating a method for modulation having an adjustable standard curve used to modulate an input signal for spread spectrum modulation. In particular, the a standard curve is generated, wherein the standard curve modulates an i... | 12/06/2011 |
| 8049571 | 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 ... | 11/01/2011 |
| 8031015 | Phase-locked loop circuit A PLL circuit is disclosed that comprises a controlling unit that switches at a predetermined timing to enable/disable the phase difference signal supplied from the phase comparator to the low pass filter; and a resistor element that is disposed between a predetermi... | 10/04/2011 |
| 7961059 | Phase lock loop control system and method with non-consecutive feedback divide values A phase-locked loop control system and method are described. Present invention phase-locked loop control systems and methods facilitate control of phase-lock loop operations. In one embodiment, phase-lock loop control systems and methods are utilized in the implemen... | 06/14/2011 |
| 7948327 | Simplified phase lock loop control model system and method A phase-locked loop control system and method are described. Present invention phase-locked loop control systems and methods facilitate control of phase-lock loop operations. In one embodiment, phase-lock loop control systems and methods are utilized in the implemen... | 05/24/2011 |
| 7932787 | Phase lock loop control system and method A phase-locked loop control system and method are described. Present invention phase-locked loop control systems and methods facilitate control of phase-lock loop operations. In one embodiment, phase-lock loop control systems and methods are utilized in the implemen... | 04/26/2011 |
| 7893779 | Modulated supply spread spectrum A system reduces a received RF signal from EMI generated by a digital electronic system that includes a clock. In the present invention the clock frequency, that generates signals and strobes data out, is purposely changed or modulated, by, illustratively, driving t... | 02/22/2011 |
| 7852162 | Pseudo random noise 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... | 12/14/2010 |
| 7843278 | 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 ... | 11/30/2010 |
| 7830214 | Adjustable chaotic signal generator using pulse modulation for ultra wideband (UWB) communications and chaotic signal generating method thereof An adjustable chaotic signal generator using pulse modulation for UWB communications, and a chaotic signal generating method thereof are provided. The chaotic signal generator for UWB communications includes a plurality of pulse generators which generates pulses of ... | 11/09/2010 |
| 7795983 | Chaotic signal enabled low probability intercept communication A circuit for generating chaotic signals implemented using heterojunction bipolar transistors (HBTs) and utilized in low probability intercept communications. The HBT chaotic circuit generates truly random analog signals in the GHz range that are non-repeating and d... | 09/14/2010 |
| 7786815 | Apparatus and method for generation of noise signal An apparatus and method for generation of a noise signal are provided. The apparatus includes a noise synthesizing module and a noise signal transfer module. The noise synthesizing module includes a voltage controlled oscillator, a phase frequency detector, a phase ... | 08/31/2010 |
| 7760035 | Noise-generating device and method The invention relates to the field of devices intended to generate a noise of high amplitude having specific spectral characteristics. It concerns a transmission device mainly comprising a transducer, means for synthesizing a digital noise sequence x′(n) and power... | 07/20/2010 |
| 7719371 | Spread spectrum clock and reference signal generator Exemplary embodiments of the invention provide a system, method and apparatus for spread spectrum functionality for a free-running, reference harmonic oscillator. In an exemplary embodiment, an apparatus comprises a reference oscillator adapted to provide a referenc... | 05/18/2010 |
| 7692503 | Random number generator based on oscillator noise Embodiments of the invention are generally directed to systems, methods, and apparatuses for a random number generator (RNG) based on oscillator noise. In some embodiments, the RNG buffers effects of thermal noise from two independent oscillators impacted by effects... | 04/06/2010 |
| 7692502 | Oscillatory system and method for controlling an oscillatory system of this type The invention relates to a method for controlling an oscillatory system with the aid of at least one measured variable by the detection of at least one oscillation component (Sx(t)) over time (t) in the form of at least one measured variable. According to... | 04/06/2010 |
| 7642870 | Device and method for generating an adjustable chaotic signal A device and method for generating an adjustable chaotic signal are provided. The chaotic signal generation device includes a plurality of triangle pulse train generators which generate a plurality of triangle waves having different frequency cycles, an adder which ... | 01/05/2010 |
| 7616071 | PLL circuit and semiconductor device provided with PLL circuit Disclosed is a PLL circuit of a small circuit size capable of generating clock including a jitter component with ease. A phase comparator 11 compares the phase of an input reference clock signal CKR to the phase of a signal fed back from a frequency divider | 11/10/2009 |
| 7583155 | Random sequence generator A device for generating a random sequence (10) of bits is disclosed. The device comprises oscillating means (13), which will generate a random sequence of bits when biased with a noise signal. The oscillating means comprises at least one oscillator amp... | 09/01/2009 |
| 7576620 | Pseudo random clock generator A pseudo random clock generator includes a clock generator for generating a clock signal. A pseudo random code generator receives the clock signal and thereby generating a pseudo random code. A code limiter enables the value of the pseudo random code being unchanged... | 08/18/2009 |
| 7511586 | Noise generator A device for generating a noise signal, which may be used for generating a truly random sequence (10) of bits is disclosed. The device comprises a noise source (11), and an amplifier (12) connected to the noise source (11). The device acc... | 03/31/2009 |
| 7508278 | Asymmetry triangular frequency modulation profiles for spread spectrum clock generations Spread spectrum clock generation (SSCG) using asymmetric triangular profiles to reduce electromagnetic interference (EMI). The asymmetric triangular profiles provide better peak power attenuation and a more uniform power spectrum spread than conventional symmetric t... | 03/24/2009 |
| 7504897 | Switched-current oscillator for clock-frequency spreading A switched-current oscillator having a dc current source adapted to charge a capacitor so that the capacitor charging time is controlled based on a sequence of (pseudo)randomly selected values, each of those values defining a corresponding charging time. A discharge... | 03/17/2009 |
| 7479837 | Noise signal generation by mapping random words A noise signal generator includes a random word generator for generating a sequence of random words, each word representing an input value, a mapping unit for receiving the sequence of random words, mapping each input value to an output value of according to a proba... | 01/20/2009 |
| 7463103 | Chaotic signal generator for ultra wide band communication system In a chaotic signal generator, a first signal generator generates a first signal. The first signal includes a first fundamental wave having a preset first frequency and a plurality of harmonic waves of the first fundamental wave. A second signal generator generates ... | 12/09/2008 |
| 7449967 | Probabilistic pulse generator and differential absolute value computing element and manhattan distance arithmetic unit using this A stochastic pulse generator (1) of this invention includes a variable signal generator (61) operative to generate a variable signal (VC) which varies randomly, and a comparator (3) operative to output a binary signal (Vout... | 11/11/2008 |
| 7423494 | Apparatus and method for a spread-spectrum oscillator for magnetic switched power converters A method and apparatus for a spread-spectrum oscillator for a switched power converter is provided. The spread-spectrum oscillator includes a current waveform generation circuit, a capacitor, a switch, and a comparator. The capacitor is arranged to receive an oscill... | 09/09/2008 |
| 7417511 | Modulation circuit with integrated microelectro-mechanical system (MEMS) components A modulation circuit includes a microelectronic electromechanical system (MEMS) based resonant structure having a resonant frequency, an excitation input and an output. A control module is coupled to the excitation input of the MEMS based resonant structure. The con... | 08/26/2008 |
| 7417509 | Spread spectrum modulation of a clock signal for reduction of electromagnetic interference A spread spectrum frequency modulated oscillator circuit usable as a clock comprises a reference component such as a resistor, a voltage controlled oscillator and a first circuit coupled to the reference component and voltage controlled oscillator and configured to ... | 08/26/2008 |
| 7409331 | Apparatus for designing mixed signal integrated circuits and configurable synchronous digital noise emulator circuit A method for designing an integrated circuit having analog and digital circuit portions is disclosed. The method involves providing an emulation circuit, which preferably comprises a number of gates equivalent to a number of gates in the digital circuit portion, aff... | 08/05/2008 |
| 7365585 | Apparatus and method for charge pump slew rate control An apparatus and method for improving memory cell reliability is disclosed. The slew rate is reduced in an applied voltage signal used to program a memory cell when Fowler-Nordheim (FN) tunneling injection is detected. The applied programming signal is provided by a... | 04/29/2008 |
| 7362191 | Methods and circuits for frequency modulation that reduce the spectral noise of switching regulators The present invention comprises methods and circuits for spread spectrum frequency modulation that reduce peak spectral noise at the outputs or inputs of switching regulators. More specifically, the present invention modulates the operating frequency of the switchin... | 04/22/2008 |
| 7363620 | Non-linear execution of application program instructions for application program obfuscation Obfuscating an application program comprises reading a first application program, determining an application program instruction location permutation that transforms the first application program into an obfuscated application program having at least one application... | 04/22/2008 |
| 7358821 | Digital frequency jittering apparatus with random data generator and method thereof A digital frequency jittering circuit for varying a switching frequency of a power supply is disclosed. The digital frequency jittering circuit includes a random data generator, an analog to digital functional module, and a digital to analog functional module. The r... | 04/15/2008 |
| 7355374 | Direct current voltage transformer A DC voltage transformer includes an oscillator, which can be controlled in terms of a characteristic such as its phase and/or frequency, and a modulation circuit that provides a periodic or random control signal to the oscillator. A power switch is connected in ser... | 04/08/2008 |
| 7352862 | Encryption method, communication system, transmission device, and data input device An encryption method includes the steps of (a) generating random data including a first part and a second part, the first part specifying an operation to be performed on plain text data and the second part being used in the operation, (b) performing the specified op... | 04/01/2008 |
