| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 332117000 | FREQUENCY MODULATOR | 32 |
| 20080278254 | FREQUENCY MODULATOR - A clock frequency modulator for an oscillator having a digital circuit for the generation of a signal modulating the clock frequency, the digital circuit adapted to obtain, from the signal generated by the oscillator, a first pulse signal having a lower frequency than the clock frequency of the oscillator, a digital counter adapted to count the pulses of the first signal and to produce a digital signal and a digital-to-analog converter adapted to convert the digital signal in the signal for modulating the clock frequency of the oscillator. | 11-13-2008 |
| 20090002089 | Digital FM Transmitter with Variable Frequency Complex Digital IF - A system, method and apparatus are described for digitally synthesizing a signal for FM transmission. A complex variable frequency digital IF signal is generated for use by a digital modulator in transmission of a signal with an integrated circuit. In some examples, the integrated circuit includes various baseband processing blocks, an up-sampler, a summer, a numerically controlled oscillator (NCO) and a complex rotator, all arranged in cooperation with one another. The complex variable frequency digital IF signal can be used by a digital quadrature modulator for generation of the synthesized analog RF transmission signal, and optionally for use with an orthogonal frequency division multiplexing (OFDM) scheme. | 01-01-2009 |
| 20090315632 | Modulation Circuit, Modulation Method, Program and Communication Apparatus - There is provided a modulation circuit including a sampling unit that over-samples an input digital signal based on a multiplying clock signal, and outputs a first over-sampling signal, a first frequency conversion unit that outputs a first high-frequency signal based on the first over-sampling signal and a reference signal, a first filter unit that outputs a second high-frequency signal based on a second over-sampling signal obtained by delaying the first over-sampling signal by one clock and the reference signal, a second filter unit that outputs a third high-frequency signal based on a third over-sampling signal obtained by delaying the second over-sampling signal by one clock and the reference signal, and an adder unit that adds the first high-frequency signal, the second high-frequency signal, and the third high-frequency signal, and outputs an output signal. | 12-24-2009 |
| 20090322438 | EXTENDED MULTI-MODULUS PRESCALER - Embodiments of apparatuses, articles, methods, and systems for a synthesizer with an extended multi-modulus prescaler are generally described herein. Other embodiments may be described and claimed. | 12-31-2009 |
| 20100090775 | Method and Apparatus for Dynamic Modulation - Circuits and methods of dynamic modulation are disclosed. A dynamic modulator is used to reduce measurable conducted and/or radiated electromagnetic interference (EMI). The dynamic modulator is configured to generate either a set of optimal frequency modulation depths or discrete frequencies or both, and dynamically selects them to use over a series of programmable time durations (dwell time). Together with the utilization of Peak, Average or Quasi-Peak (QP) method of measurement, the dynamic modulator can reduce the spectral amplitude of EMI components, in particular the lower harmonics, to effectively pass regulatory requirements. In alternative embodiments, the dynamic modulator is used in a closed loop system to continuously adjust the frequency and the duty cycle of a PWM signal to reduce conducted and/or radiated EMI. | 04-15-2010 |
| 20100171562 | APPARATUS AND METHOD FOR MODULATION AND DEMODULATION USING FREQUENCY SELECTIVE BASEBAND - Provided are modulation and demodulation methods and apparatuses using a frequency selective baseband. The frequency modulation method includes: generating a plurality of subgroups by dividing 2N (N is a real number) spread codes used for frequency spreading into 2M (M| 07-08-2010 | |
| 20100244975 | COMMUNICATION APPARATUS AND SIGNAL PROCESSING METHOD THEREOF - A communication apparatus including: a modulator which modulates a reference clock signal having a predetermined basic frequency and outputs a modulated clock signal whose value fluctuates at a first frequency with respect to the basic frequency; a PWM signal generator which generates a PWM signal at a second frequency, with the modulated clock signal being as an operation clock; a switching portion which outputs a signal by switching an analog signal on the basis of the PWM signal; a filter which passes a signal included in an output signal of the switching portion, a frequency of the passed signal being lower than a third frequency, and a setting portion which sets the first frequency and the second frequency such that a fourth frequency in which a duty value of the PWM signal fluctuates is higher than the third frequency and such that the first frequency is higher than the second frequency. | 09-30-2010 |
| 20100265002 | METHOD OF MODULATING A COMMON SIGNAL OF LIQUID CRYSTAL DISPLAY - A driving circuit of LCD includes a common signal generator and a modulation circuit. The modulation circuit can generate a first frequency, a second frequency, and a third frequency. The common signal generator generates a swing common signal according to the first frequency, and modulates the frequency of the common signal in the frequency range between the second frequency and the third frequency. | 10-21-2010 |
| 20110012688 | FREQUENCY MODULATOR AND METHOD FOR ADJUSTING GAIN THEREOF - A frequency modulator capable of performing frequency modulation without increasing quantization noise; and a method for adjusting the gain thereof are provided. An input signal is gain-adjusted by a gain adjustment section and outputted to a frequency modulation section. The frequency modulation section is gain-controlled based on a first signal. For setting a digital gain coefficient and an analog gain coefficient of the gain adjustment section, a test signal is inputted. In this state, in a generation section, first control information for setting the digital gain coefficient and second control information for setting the analog gain coefficient are generated based on information regarding a state of the frequency modulation section. | 01-20-2011 |
| 20110156832 | Method and Apparatus for Modifying a Characteristic of a Complex-Valued Signal - A method for modifying a characteristic of a representation of a complex-valued signal which comprises at least a representation of a first and a second complex-valued symbol comprising deriving a relative phase angle between the representation of the first and the second complex-valued symbols. The method further comprises combining a representation of a complex-valued enhancement pulse and the representation of the complex-valued signal to obtain a representation of a first and a second corrected complex-valued symbol, wherein the enhancement pulse is chosen such that the relative phase angle between the first and second corrected symbols is smaller than a predetermined threshold. | 06-30-2011 |
| 20120194289 | FREQUENCY MODULATION FEEDBACK SYSTEM - A frequency modulation feedback system applied to an actuation device composed of a carrier and a drive unit for driving the carrier. The frequency modulation feedback system includes: a feedback device for reading a feedback signal of the carrier and transmitting the feedback signal; a control section for receiving and reading the feedback signal to drive the drive unit; a passage, the feedback signal being transmitted from the feedback device via the passage to the control section; and a modulation device for modulating the waveform of the transmitted feedback signal. After the feedback device reads the feedback signal, the feedback device first transmits the feedback signal to the modulation device for the modulation device to change the waveform of the feedback signal. Then the feedback signal is transmitted via the passage to the control section for reading. | 08-02-2012 |
| 20150303874 | DEMODULATOR AND MODULATOR - There is provided a frequency down converter group including frequency down converters corresponding to a plurality of input terminals, and IV converters being paired therewith; and a voltage-controlled oscillating circuit group including voltage-controlled oscillating circuits corresponding to a plurality of frequency bands, and VI converters being paired therewith. The IV converters and VI converters are electrically connected to a common current signal node. The demodulator is capable of generating a local signal having a desired frequency and converting an RF modulated signal into a signal having a frequency of a baseband signal by use of a smaller number of voltage-controlled oscillating circuits, by changing combination of the pair of the operating frequency down converter and the IV converter and the pair of the voltage-controlled oscillating circuit and the VI converter depending on the frequency bands. | 10-22-2015 |
| 332118000 | Including measuring or indicating | 1 |
| 20090322439 | PHASE LOCKED LOOP BASED FREQUENCY MODULATOR WITH ACCURATE OSCILLATOR GAIN ADJUSTMENT - A frequency modulator includes a tuning circuit configured to determine a nominal gain characteristic of a digitally controlled oscillator (DCO) in a first mode, and to determine an actual gain characteristic of the DCO in a second mode using the nominal gain characteristic. The frequency modulator also comprises a modulation circuit comprising the DCO coupled to the tuning circuit, configured to modulate a frequency of a DCO output signal with a modulation signal input, and to scale the modulated DCO output signal based on the actual gain characteristic in the second mode to provide gain compensation and frequency modulation of the DCO. The tuning circuit may include a select switch to couple a minimal and maximal tuning word to the DCO in the first mode and an actual operating point word in the second mode to the DCO to determine the nominal gain characteristic. | 12-31-2009 |
| 332119000 | Plural modulation | 8 |
| 20090009259 | ANGLE MODULATOR - An angle modulator having an excellent noise characteristic and an excellent distortion characteristic independent of an unwanted wave component of an optical modulation signal is provided. The angle modulator ( | 01-08-2009 |
| 20090066436 | MULTI-BRAND ELECTRONIC APPARATUS AND MULTI-BAND SIGNAL PROCESSING METHOD - A multi-band electronic apparatus and method thereof is provided. The method comprises outputting a first output signal in the first band by a first voltage controlled oscillator according to a switch control signal and a control voltage, outputting a second output signal in the second band by a second voltage controlled oscillator according to the switch control signal and the control voltage, the second band being not completely overlapped by the first band, performing frequency division selectively on the first output signal or the second frequency divided signal according to the switch control signal, and outputting a first frequency divided signal, determining a phase difference between the first frequency divided signal and a reference signal to output a phase difference signal, outputting the control voltage according to the phase difference signal, and selectively driving the first or the second voltage controlled oscillators by the control voltage according to the switch control signal. | 03-12-2009 |
| 20090206941 | CHARGE PUMP-BASED FREQUENCY MODULATOR - A charge pump-based frequency modulator is provided. The charge pump-based frequency modulator comprises an analog phase correction path comprising a varactor and a charge pump. The varactor is coupled to an output of the charge pump-based frequency modulator. The charge pump is coupled to a node between the varactor and the output and receives a signal containing the modulated data. | 08-20-2009 |
| 20100219900 | VOLTAGE AND CURRENT SIGNALING - Circuitry and methods are provided. Voltage and current of an electrical load are detected, scaled and biased to derive respective voltage and current signals. Frequency-modulated signals corresponding to the voltage and current signals are respectively derived. The frequency-modulated signals are communicated between different electrical domains by way of optical isolation barriers. The frequency-modulated signals are processed to improve linearity and to time-correlate the signals to discrete samplings of the load voltage and current. Control of a printer or other device is performed using the processed signals. | 09-02-2010 |
| 20120098612 | REDUCED COMPLEXITY FDM-CPM DECTECTOR WITH MULTIPLE ACCESS INTERFERENCE CANCELLATION - An FDM-CPM multi-user detector ( | 04-26-2012 |
| 20140009237 | Frequency Modulator and Magnetic Resonance Tomography System with a Frequency Modulator - A frequency modulator includes a first pair of diodes with two capacity diodes, and a second pair of diodes with two additional capacity diodes. The second pair of diodes is employed in parallel. The frequency modulator also includes a first modulator input for reception of a first modulation signal and a second modulator input for reception of a symmetrical second modulation signal. Both pairs of diodes are coupled to an oscillator unit. | 01-09-2014 |
| 332120000 | Including amplitude modulation | 2 |
| 20080284536 | Dual Mode Power Amplifier - A dual mode power amplifier can include a linear gain section and a non-linear gain section configured together as a polar amplifier. The dual mode power amplifier may be used to transmit GFSK, 4-DPSK, and 8-DPSK modulated data. In one mode, both non-linear and linear gain sections may be used to transmit 4-DPSK and 8-DPSK modulated data. Alternatively, in another mode, the linear gain section may be bypassed while the non-linear gain section may be used to transmit GFSK modulated data. By selecting the operating mode, the dual mode power amplifier may be advantageously configured to use relatively less power while supporting GFSK, 4-DPSK, and 8-DPSK modulation schemes. | 11-20-2008 |
| 20100301960 | Method and Arrangement for Generating a Frequency-Modulated Signal - In order to generate a broadband, frequency-modulated output signal, of which the carrier frequency is adjustable within a wide frequency range, a frequency-modulated signal is generated on an arbitrary, fixed carrier frequency, which is then converted into IQ signals, and the IQ signals generated in this manner are combined with the desired carrier frequency by IQ modulation to form the frequency-modulated output signal. By preference, the generated IQ signals are low-pass filtered before the IQ modulation. | 12-02-2010 |
| 332123000 | Including stabilization or alternatively distortion, noise or other interference prevention, reduction, or compensation | 9 |
| 20160126891 | Ka Band Multi-Chip Modulator - A multi-chip module is provided including a multiplier configured to multiply a frequency of an input signal into a predetermined Ka-band frequency center channel, a modulator configured to modulate the center channel, and an amplifier configured to amplify a modulated signal for output. | 05-05-2016 |
| 332124000 | Nonlinearity reduction or compensation | 2 |
| 20080211595 | CIRCUIT ARRANGEMENT FOR FREQUENCY MODULATION - A circuit arrangement for frequency modulation is provided, which includes a voltage-controlled oscillator having at least one varactor diode that is driven by a drive signal, wherein a capacitance of the varactor diode depends on the drive signal, includes a modulating unit that creates a modulation signal for frequency modulation of the voltage-controlled oscillator, and includes a drive unit that generates the drive signal for the at least one varactor diode from the modulation signal, wherein the drive unit generates the drive signal from the modulation signal in such a manner that a linear relationship results between the modulation signal and the capacitance of the varactor diode. | 09-04-2008 |
| 20090295493 | Self-Calibrating Modulator Apparatuses and Methods - A self-calibrating modulator apparatus includes a modulator having a controlled oscillator and an oscillator gain calibration circuit. The oscillator gain calibration circuit includes an oscillator gain coefficient calculator configured to calculate a plurality of frequency dependent oscillator gain coefficients from results of measurements taken at the output of the controlled oscillator in response to a test pattern signal representing a plurality of different reference frequencies. The plurality of frequency dependent gain coefficients determined from the calibration process are stored in a look up table (LUT), where they are made available after the calibration process ends to scale a modulation signal applied to the modulator. By scaling the modulation signal prior to it being applied to the control input of the controlled oscillator, the nonlinear response of the controlled oscillator is countered and the modulation accuracy of the modulator is thereby improved. | 12-03-2009 |
| 332126000 | Automatic frequency stabilization or control | 6 |
| 20080211596 | FREQUENCY MODULATION CIRCUIT - Provided is a frequency modulation circuit | 09-04-2008 |
| 332127000 | Phase or frequency locked loop | 5 |
| 20080224789 | PHASE LOCKED LOOP AND METHOD THEREOF - In a phase locked loop (PLL), phase shifters shift a phase of an input signal. Based on the phases of the input signal, the shifted signals, and a frequency division output signal, phase frequency detectors (PFDs) generate phase difference signals. In response to the phase difference signals, charge pumps (CPs) control output voltages thereof. Based on the output voltages of the CPs, a voltage controlled oscillator (VCO) outputs an output signal. A frequency divider divides the frequency of the output signal from the VCO to generate the frequency division output signal. A circulator outputs the frequency division output signal to one of the PFDs at a proper timing. A modulator reduces quantization errors of the frequency divider. | 09-18-2008 |
| 20080252392 | DISCRETE DITHERED FREQUENCY PULSE WIDTH MODULATION - A system is described for generating a discrete noise-shaped variable switching frequency signal that may be used to define a digital pulse width modulation (“PWM”) period. The system may define a switching frequency waveform that may be used to generate a current switching frequency signal as a function of a system clock. The system may quantize the current switching frequency signal to generate a discrete switching frequency signal that is realizable with the system clock. The system may detect quantization noise and input the noise into the current switching frequency signal to eliminate or reduce discrete tones at the switching frequencies of a PWM signal spectrum. | 10-16-2008 |
| 20080258835 | CIRCUIT AND METHOD FOR GLITCH CORRECTION - Correction of glitches output from a delta-sigma modulator is accomplished using an integer boundary crossing detector and a FIR filter. The detector monitors a portion of an input to the modulator. The detector recognizes a transition from an all 1's bit pattern to an all 0's bit pattern or vice versa as representative of potential for a glitch to be present on the output of the modulator. The detector responsively generates condition detection output. Receipt of such condition detection output triggers the generation of a correction signal by the filter. The correction signal is, at least substantially similar, in magnitude but opposite in sign from to the expected glitch at the output of the modulator. The correction signal is added to the output of the modulator to substantially eliminate the glitch. | 10-23-2008 |
| 20150102868 | FREQUENCY MODULATOR HAVING DIGITALLY-CONTROLLED OSCILLATOR WITH MODULATION TUNING AND PHASE-LOCKED LOOP TUNING - A frequency modulator includes a digitally-controlled oscillator (DCO) arranged for producing a frequency deviation in response to a modulation tuning word and a phase-locked loop (PLL) tuning word. In addition, another frequency modulator includes a DCO and a DCO interface circuit. The DCO is arranged for producing a frequency deviation in response to an integer tuning word and a fractional tuning word. The DCO interface circuit is arranged for generating the integer tuning word and the fractional tuning word to the DCO, wherein the fractional tuning word is obtained through asynchronous sampling of a fixed-point tuning word. | 04-16-2015 |
| 332128000 | Modulating signal applied to plural elements of the loop | 1 |
| 20100066459 | Two-point phase modulator and method of calibrating conversion gain of the same - A two-point phase modulator and a method of calibrating conversion gain of the same are provided. The two-point phase modulator locks an output frequency signal by charging and pumping charge in a phase-locked loop (PLL) circuit at the beginning of operation, opens a loop of the PLL circuit for a period of time, and applies a step signal, thus calibrating conversion gain of a modulation signal that controls the output frequency signal. Thus, the conversion gain may be accurately calibrated by the calibration operation at one time. | 03-18-2010 |
| 332129000 | Including microwave or distributed parameter structure | 1 |
| 20090096545 | DYNAMIC FREQUENCY TUNING OF ELECTRIC AND MAGNETIC METAMATERIAL RESPONSE - A geometrically modifiable resonator is comprised of a resonator disposed on a substrate, and a means for geometrically modifying the resonator. The geometrically modifiable resonator can achieve active optical and/or electronic control of the frequency response in metamaterials and/or frequency selective surfaces, potentially with sub-picosecond response times. Additionally, the methods taught here can be applied to discrete geometrically modifiable circuit components such as inductors and capacitors. Principally, controlled conductivity regions, using either reversible photodoping or voltage induced depletion activation, are used to modify the geometries of circuit components, thus allowing frequency tuning of resonators without otherwise affecting the bulk substrate electrical properties. The concept is valid over any frequency range in which metamaterials are designed to operate. | 04-16-2009 |
| 332135000 | Including discrete semiconductor device | 1 |
| 20090115546 | MODULATOR COMPRISING A DUAL-FREQUENCY OSCILLATOR AND A SYNTHESIZER - Oscillators ( | 05-07-2009 |
