Class / Patent application number | Description | Number of patent applications / Date published |
327164000 | Generating rectangular (e.g., clock, etc.) or pulse waveform having random characteristic (e.g., random width, etc.) | 31 |
20080303572 | Spread Spectrum Device and Related Random Clock Generator for a Switching Amplifier - A random clock generator for a spread spectrum modulating device includes a random number generator for generating a plurality of random number signals according to a first square wave signal and a control signal, a reference wave generator coupled to the random number generator for generating a triangular signal and a second square wave signal according to the plurality of random number signals, and a trigger signal generator coupled to the random number generator and the reference wave generator, for generating the first square wave signal according to the second square wave signal. | 12-11-2008 |
20090072872 | Control circuit and dithering method - There is provided a control circuit of a switch mode power supply including a random number generator configured to form an optimized n-degree polynomial based on the minimum power-on cycle time in order to form a uniform distribution of output signals, a switch control block configured to control output signals of the switch control block such that the complementary output stages of the switch control block conduct at different times on the basis of the output signals received from the random number generator and a dither control block configured to generate a synchronized dither current by minimizing glitches at each differential stage of a default reference current based on the output signals received from the switch control block, and to combine the generated synchronized dither current with a reference current of a voltage ramp generator. | 03-19-2009 |
20090128205 | ELECTRONIC PULSE-GENERATING DEVICE - An electronic pulse-generating device ( | 05-21-2009 |
20090160513 | Signal generating apparatus and class-D amplifying apparatus - A time period control unit controls a time length “TU” of each of unit terms “U” in a variable manner. A pulse-width modulating unit is arranged by a holding unit, a counting unit, and a waveform generating unit. The holding unit holds thereinto a plurality of data “XD” every unit term “U”, which are sequentially supplied, as data “XE.” The counting unit changes a count value “X” during each of the unit terms “U.” The waveform generating unit generates such a pulse-width modulating signal “S” that pulses “P” have been arranged every unit term “U”, while time points when a large/small relationship between the count value “C” and a numeral value of the data “XE” held by the holding unit is inverted are defined as edge portions of the pulses. | 06-25-2009 |
20090201061 | Electronic apparatus having display portion and oscillator and manufacturing method of the same - A method for manufacturing a quartz crystal unit comprises the steps of forming a quartz crystal tuning fork resonator vibratable in a flexural mode of an inverse phase and having a quartz crystal tuning fork base and first and second quartz crystal tuning fork tines connected to the quartz crystal tuning fork base, forming at least one groove having at least three stepped portions in at least one of opposite main surfaces of each of first and second quartz crystal tuning fork tines, disposing an electrode on a surface of one of the at least three stepped portions of the at least one groove and an electrode on one of opposite side surfaces of each of the first and second quartz crystal tuning fork tines, mounting the quartz crystal tuning fork resonator on a mounting portion of a case, and connecting a lid to the case to cover an open end of the case, wherein the step of forming the quartz crystal tuning fork base and the first and second quartz crystal tuning fork tines is performed before the step of forming the at least one groove having the at least three stepped portions. | 08-13-2009 |
20090201062 | Electronic apparatus having display portion and oscillator and manufacturing method of the same - A method for manufacturing a quartz crystal unit comprises the steps of adjusting an oscillation frequency of a quartz crystal tuning fork resonator that is vibratable in a flexural mode of an inverse phrase and that has first and second quartz crystal tuning fork tines, forming at least one groove in each of two of opposite main surfaces of each of first and second quartz crystal tuning fork tines, disposing an electrode on a surface of the at least one groove formed in each of two of the opposite main surfaces and each of two of opposite side surfaces of each of the first and second quartz crystal tuning fork tines so that the electrodes of the grooves of the first quartz crystal tuning fork tine are connected to the electrodes of the side surfaces of the second quartz crystal tuning fork tine and the electrodes of the grooves of the second quartz crystal tuning fork tine are connected to the electrodes of the side surfaces of the first quartz crystal tuning fork tine, the quartz crystal tuning fork resonator having a series resistance R | 08-13-2009 |
20090267669 | Microwave Generating Apparatus and Microwave Generating Method - The present invention is a microwave generating apparatus comprising: a switch signal generator that generates a square wave switch signal having a fundamental frequency of a microwave band; a switching power amplifier that performs a switching power amplification based on the switch signal so as to output an amplified signal; a variable voltage supplier that is capable of variably supplying a driving voltage for amplification to the switching power amplifier; a microwave selector that extracts from the amplified signal a sine wave signal of the same frequency as the fundamental frequency of the switch signal so as to output the same as a microwave; an output signal detector that detects the microwave; and a driving voltage controller that controls the variable voltage supplier based on a result detected by the output signal detector. | 10-29-2009 |
20100127743 | Multi-function modulator for low-powered, wired and wireless command, control, and communications applications - An amplitude, phase and frequency modulator circuit is provided with the circuit containing a periodically driven switch. The circuit connects a DC power source and a resistive load. Periodic operation of the switch generates a square-wave of voltage across the load. A transistor used as a switch is embedded in a switch driver that controls base current and base-emitter reverse bias voltage. The modulator DC input resistance is approximately equal to the load resistance when the switch ON-state period and OFF-state period are approximately equal. The modulator efficiency is nearly one hundred percent. The frequency response of the square-wave modulator system is high-pass with a lower cutoff frequency determined by element values. | 05-27-2010 |
20100194460 | WAVEFORM GENERATOR - Timing setting data include an arbitrary combination of a set timing signal indicating a positive edge timing and a reset timing signal indicating a negative edge timing. A sort unit sorts n pieces of the timing setting data in accordance with timing orders indicated by each of the timing setting data. With reference to the sorted timing setting data an open processor detects continuation of the set timing signals or continuation of the reset timing signals, and invalidates one of the continuous set timing signals or one of the continuous reset timing signals. An edge assigning unit sequentially assigns the set/reset timing signals remaining without being invalidated to, among the m variable delay circuits for setting/resetting, the variable delay circuits for setting/resetting in the ascending order of the frequencies of use thereof by then. | 08-05-2010 |
20100201419 | Apparatus and method for generating random number - A random number generating apparatus and method for generating a metastable state signal by using logic gates include a metastable state generating unit generating and outputting a metastable state signal; an amplifying unit receiving the metastable state signal from the metastable state generating unit, amplifying the received metastable state signal, and outputting the amplified metastable state signal; and a sampling unit receiving the amplified metastable state signal and a sampling clock, and sampling and outputting the amplified metastable state signal according to the sampling clock. | 08-12-2010 |
20100213996 | CIRCUIT BREAKER - A circuit breaker having break contacts for disconnecting an electric grid or network in a predetermined manner includes a trigger unit which triggers actuation of the break contacts in response to signals received from a detector which detects aperiodic, substantially step-like changes in the amplitude of at least one electric parameter in the electric network. The trigger unit is operatively connected with the detector. The disclosed circuit breaker reduces the likelihood of a fire caused by faults in electric networks. | 08-26-2010 |
20100283521 | VOLTAGE PULSE TRAIN GENERATOR, APPLICATION TO THE CONTROL OF AN ULTRASOUND PIEZOELECTRIC INJECTOR - A voltage pulse train generator which may find application to control of an ultrasound piezoelectric injector, and including a voltage source providing a DC initial voltage, a DC/DC converter supplied with the initial voltage and configured to charge a capacitor according to an intermediate DC voltage greater than the initial voltage, a DC/AC converter operating by switching, by alternating active phases and inactive phases, which is configured to transform the intermediate voltage from the capacitor into a final voltage pulse train, and a control unit provided for driving the converters. The DC/DC converter is configured to operate to charge the capacitor at a same time as the DC/AC converter, at most during the inactive phases of the switching of the DC/AC converter. | 11-11-2010 |
20100327927 | METHOD AND SYSTEM FOR CONTROLLING RADIO FREQUENCY POWER - A method for controlling pulsed power that includes measuring a first pulse of power from a power amplifier to obtain data. The method also includes generating a first signal to adjust a second pulse of delivered power, the first signal correlated to the data to minimize a power difference between a power set point and a substantially stable portion of the second pulse. The method also includes generating a second signal to adjust the second pulse of delivered power, the second signal correlated to the data to minimize an amplitude difference between a peak of the second pulse and the substantially stable portion of the second pulse. | 12-30-2010 |
20110006822 | Open-Loop Line Driver Control Method and Apparatus - According to an embodiment, a circuit includes an amplifier and an open-loop control system. The amplifier has an output stage for amplifying a signal, a power supply for driving a supply voltage of the output stage to different voltage levels responsive to being modulated and a pulse width modulator for modulating the power supply responsive to a mask input. The open-loop control system includes a mask generator and a detector. The mask generator is configured to generate the mask input as a function of the envelope of the signal. The detector is configured to detect discontinuities in the mask input and compensate for the discontinuities. | 01-13-2011 |
20110012657 | DIGITALLY CONTROLLED OSCILLATOR - A digitally controlled LC-tank oscillator is constructed by connecting different tuning circuits to a LC tank. The tuning circuit includes a single bank of tuning cells, a dual bank of tuning cells, or a fractional tuning circuit. Each of said tuning cells in the tuning circuit includes a tuning circuit element and a memory cell. | 01-20-2011 |
20110210774 | APPARATUS AND METHOD FOR PROVIDING MULTI-MODE CLOCK SIGNALS - Apparatus and methods for providing multi-mode clock signals are disclosed. In some embodiments, a multi-mode driver configured to receive a first clock signal, and to selectively output a different clock signal in response to one or more signals from a controller is provided. The driver can include an H-bridge circuit without substantial increases in the size of the design area. Advantageously, lower jitter and improved impedance matching can be accomplished. | 09-01-2011 |
20110267121 | APPARATUS AND METHOD FOR ALTERING THE PROPERTIES OF MATERIALS BY PROCESSING THROUGH THE APPLICATION OF A MAGNETIC FIELD - A system and method for altering the properties of a material by exposure of the material to a magnetic field is described herein. The method comprises generating a magnetic field; exposing a material to the magnetic field, and determining the optimum settings of the magnetic field parameters for the particular material. The magnetic field may be time varying or time invariant. Various properties of the magnetic field can be altered to determine the optimum settings for altering the material properties, including the amplitude, frequency, and waveform. In one embodiment, a method for improving the conductivity of a transmission line is provided, comprising: providing a high voltage electrical transmission line; temporarily installing a magnetic field generator along at least a portion of the transmission line; and generating a pulsed magnetic field around at least a portion of the transmission line using the magnetic field generator and simultaneously running a current through the transmission line. | 11-03-2011 |
20120019298 | SIGNAL GENERATOR AND SIGNAL STRENGTH DETECTING CIRCUIT HAVING THE SIGNAL GENERATOR INSTALLED THEREIN - A signal generator includes: an adjusting circuit arranged to adjust a first amplitude of an oscillating signal to generate an adjusted oscillating signal; and a resistor ladder circuit arranged to receive the adjusted oscillating signal to generate a plurality of candidate output oscillating signals having a plurality of different amplitudes respectively and output an output oscillating signal selected from the candidate output oscillating signals. | 01-26-2012 |
20120169389 | DESKEWING APPARATUS FOR OSCILLOSCOPE - A deskewing apparatus includes a power supply connector, a oscillator, a first switch unit, a second switch unit, a first logic member, a second logic member, a clock generator and a plurality of output channels. The oscillator generates an electrical signal with a predetermined frequency and sinusoidal waveform. The first switch unit and the second switch unit each generates on/off signals by controlling power on/off. The first logic member and the second logic member generate logic signals according to the corresponding on/off signals from the first switch unit and the second switch unit. The clock generator multiplies the frequency of the electrical signal based on the combination of the logic signals and converting the electrical signal from sinusoidal waveform into rectangular waveform. The output channels output the converted electrical signal. | 07-05-2012 |
20120176172 | Systems and methods for playback of detected timing events - Systems and methods are disclosed for playback of detected timing events with detected phase variations. Disclosed signal generation embodiments can be used to generate digital signals having desired phase variation. Disclosed event detection circuitry can be used to generate event timing data representing one or more phase variations in detected events. The disclosed signal generation embodiments can utilize the event timing data to playback detect events along with the measured phase variations. Further, the signal generation circuitry and the event detection circuitry can be implemented in different devices or can be implemented in the same device. | 07-12-2012 |
20120286836 | Built-in Self-test Circuit for Voltage Controlled Oscillators - A built-in self-test circuit for testing a voltage controlled oscillator comprises a voltage controlled oscillator, a buffer having an input coupled to an output of the voltage controlled oscillator and a radio frequency peak detector coupled to the output of the buffer. The radio frequency peak detector is configured to receive an ac signal from the voltage controlled oscillator and generate a dc value proportional to the ac signal at an output of the radio frequency peak detector. Furthermore, the output of the radio frequency peak detector generates a dc value proportional to an amplitude of the ac signal from the voltage controlled oscillator when the voltage controlled oscillator functions correctly. On the other hand, the output of the radio frequency peak detector is at zero volts when the voltage controlled oscillator fails to generate an ac signal. | 11-15-2012 |
20130021075 | SPREADING A CLOCK SIGNAL - Method, circuitry and device for spreading a clock signal in which the clock signal is received at an input of a variable delay line, the clock signal having been generated by a clock signal generator. In one embodiment, for each edge of the clock signal, the delay introduced by the variable delay line is set in accordance with a stored delay value. For each of a plurality of consecutive edges of the clock signal, the stored delay value is either incremented or decremented based on a randomly generated value for that edge. A spread version of the clock signal is output from the variable delay line, wherein each edge of the spread version of the clock signal is delayed by the respective delay that is set for that edge of the clock signal. | 01-24-2013 |
20130082756 | SIGNAL INPUT DEVICE OF DIGITAL-RF CONVERTER - The present invention provides a signal input device of a digital-RF converter including: a phase-modulated signal input unit configured to input a phase-modulated carrier signal to an LO switch of a digital-RF converter; and a digital signal input unit configured to correct a digital signal to correspond to the phase-modulated carrier signal, and input the corrected digital signal to a data switch of the digital-RF converter. | 04-04-2013 |
20130181758 | Device and Method For Generating Noise Signals and Use Of a Device For Generating Noise Signals - The present invention firstly relates to a device for generating noise signals. Said device comprises at least one avalanche diode which is arranged in such a way that it is reverse-biased during intended operation of the device. Moreover, the invention relates a method for generating a noise signal by means of such a device and to a use of said device and to a method for evaluating a type of an avalanche diode or of an avalanche transistor. | 07-18-2013 |
20130207702 | EDGE SELECTION TECHNIQUES FOR CORRECTING CLOCK DUTY CYCLE - Circuits and methods are provided for generating clock signals and correcting duty cycle distortion in clock signals. A circuit for generating a clock signal includes a multiplexer circuit and an edge-triggered flip-flop circuit. The multiplexer circuit selectively outputs one of a plurality of input clock signals. The edge-triggered flip-flop detects a transitioning edge of the input clock signal that is selectively output from the multiplexer circuit, and in response to the detection, samples a logic level of a received data signal, and generates a transition of an output clock signal at an output port of the edge-triggered flip-flop. The multiplexer circuit selectively outputs one of the plurality of input clock signals to a clock signal port of the edge-triggered flip-flop, based on a logic level of the output clock signal at the output port of the edge-triggered flip-flop, which is input to a select control port of the multiplexer circuit. | 08-15-2013 |
20130207703 | EDGE SELECTION TECHNIQUES FOR CORRECTING CLOCK DUTY CYCLE - Circuits and methods are provided for generating clock signals and correcting duty cycle distortion in clock signals. A circuit for generating a clock signal includes a multiplexer circuit and an edge-triggered flip-flop circuit. The multiplexer circuit selectively outputs one of a plurality of input clock signals. The edge-triggered flip-flop detects a transitioning edge of the input clock signal that is selectively output from the multiplexer circuit, and in response to the detection, samples a logic level of a received data signal, and generates a transition of an output clock signal at an output port of the edge-triggered flip-flop. The multiplexer circuit selectively outputs one of the plurality of input clock signals to a clock signal port of the edge-triggered flip-flop, based on a logic level of the output clock signal at the output port of the edge-triggered flip-flop, which is input to a select control port of the multiplexer circuit. | 08-15-2013 |
20130229215 | Variable Resistance for Driver Circuit Dithering - A dither circuit yielding a variable resistance. | 09-05-2013 |
20150109040 | SELF-FEEDBACK RANDOM GENERATOR AND METHOD THEREOF - A self-feedback random generator comprises a digital-to -analog converter, a digital oscillator, a frequency-modulating unit and a first D-type flip-flop. The digital-to-analog converter receives a digital random-code signal and the digital random-code signal is converted to corresponding analog random signal. The frequency-modulating unit modulates frequency of first digital oscillating signal so as to increase random of frequency of first digital oscillating signal according to voltage value of the analog random signal, and accordingly outputs a second digital oscillating signal. The first D-type flip-flop receives the second digital oscillating signal and a clock signal, and reads the second digital oscillating signal through utilizing the clock signal so as to outputs the digital random-code signal, wherein frequency of the clock signal is smaller than frequency of the first digital oscillating signal, and random of frequency of the second digital oscillating signal corresponds to random of the digital random-code signal. | 04-23-2015 |
20150123721 | System and Method for Gaussian Random Noise Generation - In accordance with an embodiment, a method of generating noise includes generating, using a hardware-based noise generator, a plurality of periodic waveforms having different frequencies, weighting, using the hardware-based noise generator, amplitudes of the plurality of periodic waveforms based on a predetermined spectral shape to form a plurality of weighted waveforms, and summing the plurality of plurality of weighted waveforms to form an output random noise signal. | 05-07-2015 |
20150130523 | 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. | 05-14-2015 |
20160147505 | RANDOM NUMBER GENERATOR AND METHOD FOR GENERATING RANDOM NUMBER THEREOF - A random number generator and a method for generating random number thereof are provided. The random number generator is used for generating a random sequence and includes a linear-feedback shift register (LFSR) circuit, an oscillating circuit, a delay circuit and a logic operation circuit. The LFSR circuit receives the random sequence to generate a plurality of first control signals and a plurality of second control signals. The oscillating circuit receives the first control signals to generate a random clock signal. The delay circuit receives an alternating current signal and the second control signals to generate a random delay sampling signal. The logic operation circuit receives the random clock signal and the random delay signal to generate the random sequence. | 05-26-2016 |