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| Number | Title | Issue Date |
| 8081042 | Apparatus, method and computer program An apparatus, method and computer program, the apparatus including: a modulator including a first input for receiving a data signal and a second input for receiving an output signal from a phase locked loop wherein the modulator is for modulating the output signal f... | 12/20/2011 |
| 8022782 | 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 ... | 09/20/2011 |
| 7969254 | I/Q impairment calibration using a spectrum analyzer A quadrature modulator (QM) may be calibrated by determining total equivalent offsets in the I- and Q-channels, a total equivalent gain imbalance between the I- and Q-channels, and a total equivalent phase skew between the I- and Q-channels. These values may be obta... | 06/28/2011 |
| 7944319 | Clock spreading systems and methods Clock spreading systems and methods are disclosed. In one embodiment of the invention, a clock spreading system is provided in an integrated transceiver system that comprises a base band control system and a transceiver coupled to the base band control system. The c... | 05/17/2011 |
| 7755443 | Delay-based modulation of RF communications signals An apparatus for providing an angle modulated signal includes a tunable oscillator circuit, a variable time delay circuit, and an optional scaling and delay control apparatus. The tunable oscillator circuit generates an oscillatory signal having a predetermined freq... | 07/13/2010 |
| 7675379 | Linear wideband phase modulation system Linear wideband phase modulation system. Apparatus is provided for linear phase modulation utilizing a phase-locked loop. The apparatus includes a limiting circuit that restricts a range of a modulation signal that is coupled to a voltage controlled oscillator (VCO)... | 03/09/2010 |
| 7443261 | Phase modulating apparatus, communication device, mobile wireless unit, and phase modulating method A multimode-based phase modulating apparatus capable of reducing the degradation of modulation precision and suppressing the unnecessary power consumption. This apparatus has a switch for switching the modulation modes of a PLL circuit between a single-point modulat... | 10/28/2008 |
| 7409012 | Modulator and signaling method Phase shift key modulators (100, 500, 1000, 1400, 1700) are provided in which a multiphase signal source (108, 1402, 1406-1412,1702) is used to generate a plurality of phases of a carrier signal. A selector (110) is used to select one pha... | 08/05/2008 |
| 7400211 | High speed passband phase modulation apparatus and method of the same A high speed passband phase modulation apparatus and method are provided. In the phase modulation apparatus, an RF phase shifter modulates a phase of a local signal that is generated in a VCO according to a digital input. The RF phase shifter is controlled by a phas... | 07/15/2008 |
| 7378918 | Two-point modulation type phase modulation apparatus, polar modulation transmission apparatus, wireless transmission apparatus and wireless communication apparatus There provides a two-point modulation phase modulation apparatus capable of obtaining an RF phase modulation signal of superior modulation precision with low power consumption and a simple configuration even in the event of inputting a wide band baseband modulation ... | 05/27/2008 |
| 7372932 | Locking-status judging circuit for digital PLL circuit A locking-status judging circuit is composed of a comparator that compares a phase error signal with a reference signal for judging whether or not a digital PLL circuit locks on an input signal and outputs a signal “0 (zero)” or a signal “1 (one)”, a selecto... | 05/13/2008 |
| 7358829 | Transmission apparatus, communication apparatus and mobile radio apparatus Transmission apparatus capable of reducing distortion of the vector modulation wave that is the transmission output to a sufficiently small level is provided. An amplifying section (105) generates a vector modulation wave based on an amplitude component modul... | 04/15/2008 |
| 7356315 | Outphasing modulators and methods of outphasing modulation In one exemplary embodiment of the invention, an outphasing modulator may include at least a multiplier to multiply an amplitude modulation signal by a phase modulated carrier signal to generate a modulated signal. The outphasing modulator may also include a phase s... | 04/08/2008 |
| 7333789 | Wide-band modulation PLL, timing error correction system of wide-band modulation PLL, modulation timing error correction method and method for adjusting radio communication apparatus having wide-band modulation PLL A broadband modulation PLL includes a PLL portion containing a voltage controlled oscillator (101), a frequency divider (105), a phase comparator (104) and a loop filter (103). A frequency-dividing ratio of the frequency divider (105 | 02/19/2008 |
| 7328497 | Incremental tuning process for electrical resonators based on mechanical motion A method is provided for adjusting the resonant frequency of a mechanical resonator whose frequency is dependent on the overall resonator thickness. Alternating selective etching is used to remove distinct adjustment layers from a top electrode. One of the electrode... | 02/12/2008 |
| 7295049 | Method and circuit for rapid alignment of signals Circuits and methods for aligning two or more signals including a first and second signal. In one embodiment, a shift register generates two or more shifted copies of the second signal, and each of a plurality of phase detectors receives the first signal and one of ... | 11/13/2007 |
| 7289005 | Polar modulator and a method for modulation of a signal A polar modulator contains a phase locked loop which is designed to emit a radio-frequency signal at one frequency to one output, with the frequency being derived from the reference signal and from a phase modulation signal at a control input of the phase locked loo... | 10/30/2007 |
| 7280003 | Modulation device and transmitter comprising such a device A signal modulation device comprises a delta-sigma modulator disposed for transforming an amplitude-modulation signal in baseband into a pulse signal. It also comprises a phase modulator receiving, at its input, analogue phase-modulation signals in baseband. The pul... | 10/09/2007 |
| 7269232 | Device for producing a phase and amplitude modulated radio frequency signal The invention concerns a device for producing a phase and amplitude modulated signal (G) suitable for radio transmission via an antenna (30), based on the EER technique and means (20) for temporal clamping of a phase controlling signal (D) and an ampli... | 09/11/2007 |
| 7248639 | Method for reducing the out-of-band emission in AM transmitters for digital transmission A method for reducing out-of-band emission in an AM transmitter for digital transmission includes generating, from a digital modulation signal, an amplitude signal and a phase-modulated radio frequency signal configured to control the AM transmitter. A digital modul... | 07/24/2007 |
| 7211933 | Voltage controlled oscillator The present invention provides a voltage controlled oscillator comprising an thin film BAW resonator and a variable capacitor element. The thin film BAW resonator includes an anchor section formed on a Si substrate, a lower electrode supported on the anchor section ... | 05/01/2007 |
| 7170370 | Filter device capable of obtaining attenuation characteristic of sharpness in narrow band width and branching filter using the same In a filter device 10 constituted by circuit elements formed on a single substrate 11, the circuit elements includes a first wing section 14 formed between an input signal electrode 12 and an output signal electrode 13, first reson... | 01/30/2007 |
| 7152289 | Method for forming bulk resonators silicon <110> substrate A method for forming a device on a substrate of silicon includes forming a first conductive layer onto the substrate, and forming a piezoelectric layer on the first portion of a first conductive layer. A second electrode is formed on the piezoelectric layer, a... | 12/26/2006 |
| 7141913 | Acoustic resonators An acoustic resonator of one inventive aspect includes a substrate, at least one generally crystalline primer layer provided on the substrate either directly or on top of one or more intermediate layers, a generally smooth and generally crystalline electrode layer p... | 11/28/2006 |
| 7127129 | Method and apparatus for phase shifting an optical beam in an optical device An apparatus and method for high speed phase modulation of optical beam with reduced optical loss. In one embodiment, an apparatus includes a first region of an optical waveguide disposed in semiconductor material. The first region has a first conductivity type. The... | 10/24/2006 |
| 7099373 | Noise shaping technique for spread spectrum communications A spread spectrum noise shaper uses a modulation technique to achieve a greater signal-to-noise or signal-to-interference ratio (SNR or SIR). The technique doubles the system SIR, in principle. This doubling yields a doubling in system capacity. SNR is increased by ... | 08/29/2006 |
| 7023292 | Polar modulation using amplitude modulated quadrature signals Polar modulators include a phase splitter, a controller, variable current sources, transistor circuits, and a combiner. The phase splitter splits a RF carrier signal into quadrature component signals that are 90 degrees out of phase with each other. The controller g... | 04/04/2006 |
| 7009447 | Outphasing modulator Briefly, an apparatus having an outphasing modulator that may provide at least first and second outphased signals to a power amplifier. The outphasing modulator may control amplitude of the first and second outphased signals by an amplitude modulation controller whi... | 03/07/2006 |
| 6993219 | Waveguide/MEMS switch A waveguide/MEMS switch adapted to redirect optical signals between output ports based on a phase shift change generated by motion of one or more movable MEMS mirrors incorporated therein. Advantageously, such a switch has a relatively high switching speed and low p... | 01/31/2006 |
| 6980581 | Adaptive spread spectrum An apparatus comprising a circuit configured to generate a spread spectrum clock signal. The circuit may comprise a voltage controlled oscillator with a gain that may be automatically controlled. ... | 12/27/2005 |
| 6891445 | Phase modulator In response to changes in an input binary digital signal, a 3rd order cosine pulse waveform, which, when it is changed in the increasing direction, has “0” level in a first period of T/12 (T corresponding to one-half cycle of the binary digital signal), is chang... | 05/10/2005 |
| 6707408 | Sigma-delta pulse-width-modulated signal generator circuit A circuit for generating a pulse-width-modulated signal comprises a phase-locked loop (PLL) having a duty-cycle-insensitive phase comparator and a Sigma-Delta pulse width modulation circuit suitable for providing the voltage-controlled oscillator function of the PLL... | 03/16/2004 |
| 6700449 | Saw oscillation circuit An oscillation circuit uses a SAW oscillator and is able to control the oscillation frequency easily and correct the temperature characteristic of the oscillator so that an oscillation signal with high temperature stability can be generated. A clock signa... | 03/02/2004 |
| 6683918 | High precision, low phase noise synthesizer with vector modulator An apparatus for generating a modulated signal which includes a modulator operative for receiving a first signal and input data signals, and modulating the first signal in accordance with the input data signals so as to produce a modulated reference signa... | 01/27/2004 |
| 6665353 | Quadrant switching method for phase shifter An apparatus comprising a quadrature network, an RF combining circuit and a weighting network. The quadrature network may be configured to generate a first and a second signal in response to an input signal. The RF combining circuit may be configured to g... | 12/16/2003 |
| 6621876 | System and method to reduce phase modulation bandwidth A signal source generates a phase-modulated output signal responsive to a phase-modulation signal. A phase splitter splits the phase-modulated output signal into two or more phase-offset output signals. A switch provides a selected one of the phase-offset... | 09/16/2003 |
| 6600382 | Microwave phase modulator A phase modulator for direct wideband linear phase modulation of a microwave continuous wave carrier signal which is suitable for many analog and digital phase or frequency modulation techniques. Linear phase modulation range in excess of 360 degrees is p... | 07/29/2003 |
| 6518850 | Ferroelectric modulator A method of modulating a microwave carrier and a modulating device are disclosed make it possible directly, onto a microwave carrier right at the operating frequency, to modulate an information signal from a digital bit-stream without the use of a convent... | 02/11/2003 |
| 6512474 | Ultra wideband signal source A method and system to create an ultra wideband (UWB) signal are disclosed. The UWB signal comprises a carrier frequency with each cycle reversing in phase. The UWB signal is generated from a limited number of high power narrow band amplifiers. Each ampli... | 01/28/2003 |
| 6459742 | Digital modulation process and modulator implementing the process The successive symbols of a digital stream are converted into phase increments which are accumulated. A modulating phase is obtained by filtering the accumulated phase. A complex signal is produced whose argument represents the modulating phase. Two quadr... | 10/01/2002 |
