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| Number | Title | Issue Date |
| 8180303 | Power amplifier architectures Implementations and examples of power amplifier devices, systems and techniques for amplifying RF signals, including power amplifier systems based on Composite Right and Left Handed (CRLH) metamaterial (MTM) structures. ... | 05/15/2012 |
| 8165538 | Systems and methods for implementing a harmonic rejection mixer Various embodiments of systems and methods for generating local oscillator (LO) signals for a harmonic rejection mixer are provided. One embodiment is a system for generating local oscillator (LO) signals for a harmonic rejection mixer. One such system comprises a l... | 04/24/2012 |
| 8155605 | Apparatus and method for feedforward-type phase noise elimination in portable terminal The present invention relates to an apparatus and method for feedforward-type phase noise elimination in a portable terminal, which detect and eliminate phase-reversed phase noise by subtracting a GSM transmission signal, passed through the power amplifier of a GSM ... | 04/10/2012 |
| 8145149 | Operating a voltage regulator at a switching frequency selected to reduce spurious signals Embodiments for at least one method and apparatus of a wireless transceiver are disclosed. For one embodiment, the wireless transceiver includes a transmit chain, wherein the transmit chain includes a power amplifier. The wireless transceiver additionally includes a... | 03/27/2012 |
| 8073408 | Semiconductor integrated circuit including a mixer and wireless communication apparatus A semiconductor integrated circuit includes a first input terminal configured to input a baseband signal, a second input terminal configured to input a local oscillation signal, an output terminal configured to output a modulating signal, a first amplifier circuit c... | 12/06/2011 |
| 8073407 | Radio communication device and power supplying method for radio communication device A radio communication device in which the output transmission signal of a high-frequency power amplifying part is sent out to an antenna via a circulator, a high-frequency signal reflected from the antenna is transferred via the circulator to a rectifying part to ob... | 12/06/2011 |
| 8032093 | Power detection arrangement with harmonic suppressor Embodiments of circuits, devices, and methods for a power detection arrangement are disclosed. The power detection arrangement may have a coupler coupled with, and in between, a switch and an output to couple a signal to a detector. The power detection arrangement m... | 10/04/2011 |
| 7983634 | Radio telecommunication terminal and a method of decreasing perturbations within this terminal The radio telecommunication terminal (2) comprises a data burst scheduler able to schedule the continuous transmission of consecutive data bursts which generate noise of similar energy on the radio-frequency channel as long as a specific radio-frequency chann... | 07/19/2011 |
| 7957706 | Combined matching and filter circuit A combined matching and harmonic rejection circuit with increased harmonic rejection provided by a split resonance for one or more of the capacitive or inductive elements of the circuit. At a fundamental frequency, the circuit comprises an inductive series arm with ... | 06/07/2011 |
| 7925227 | Multi-band amplifier module with harmonic suppression An amplifier circuit includes a first power amplifier that can produce a first amplified signal in response to a first input signal in a first frequency band, and a second power amplifier that can produce a second amplified signal in response to a second input signa... | 04/12/2011 |
| 7831220 | Methods and systems for calibrating for gain and phase imbalance and local oscillator feed-through Methods and systems to calibrating a transmitter for I/Q imbalance and local oscillator feed-through include generating a test tone, frequency up-converting the test tone, monitoring one or more features of the up-converted test tone, and adjusting one or more featu... | 11/09/2010 |
| 7792501 | Apparatus and method for attenuating leakage signal of transmitter in communication system An apparatus and method for attenuating a leakage signal of a transmitter in a communication system is provided. The apparatus includes a local oscillator, a mixer, and a leakage signal attenuator. The local oscillator outputs a reference frequency signal. The mixer... | 09/07/2010 |
| 7742747 | Automatic IIP2 calibration architecture An integrated automatic IIP2 calibration architecture for wireless transceivers is disclosed. The architecture enables a wireless transceiver to generate a test radio frequency (RF) signal having a second order tone with minimal additional circuitry. In particular, ... | 06/22/2010 |
| 7660562 | Combined matching and filter circuit A combined matching and harmonic rejection circuit with increased harmonic rejection provided by a split resonance for one or more of the capacitive or inductive elements of the circuit. At a fundamental frequency, the circuit comprises an inductive series arm with ... | 02/09/2010 |
| 7653364 | Local oscillator leakage relocation An indication is received to relocate leakage in a transmission signal to be transmitted. A frequency change associated with relocating the leakage in the transmission signal is obtained. The leakage in the transmission signal is relocated based at least in part on ... | 01/26/2010 |
| 7542735 | Multi-octave differential upconverter An apparatus in one example comprises a differential amplifier and a differential mixer. The differential amplifier is configured to receive a multi-octave differential input signal and output an amplified multi-octave differential output signal. The differential am... | 06/02/2009 |
| 7447483 | Radio apparatus and a method for reducing interference in a radio apparatus The invention relates to a method and an arrangement for reducing interference in a radio apparatus. The solution comprises a clock signal generator, an analog part and a controller arranged to measure interference arising from the harmonic frequencies of the clock ... | 11/04/2008 |
| 7418251 | Compact radio frequency harmonic filter using integrated passive device technology A radio frequency (“RF”) harmonic filter circuit as disclosed herein is fabricated using integrated passive device (“IPD”) technology. The RF harmonic filter circuit is configured to provide second, third, and fourth harmonic rejection while providing good i... | 08/26/2008 |
| 7409196 | RFIC transmit power control An RFIC transmitter includes a digital transmit processing module, a digital to analog converter, a filter and gain module, an up-conversion module, a power amplifier, and a transmit signal strength module. The transmit signal strength module is coupled to generate ... | 08/05/2008 |
| 7376399 | Weighted mixing circuitry for quadrature processing in communication systems Mixing circuitry for quadrature processing in communication systems and related methods are disclosed. The weighted mixing circuitry allows for arbitrary dividers to be utilized in generating the mixing signals for quadrature processing and thereby provides a signif... | 05/20/2008 |
| 7356309 | Directional coupler for communication system An improved directional coupler that significantly reduces the signal degradation problems associated with distortion caused by circuit elements used to measure the transmitted power. In a selected embodiment, the directional coupler of the present invention compris... | 04/08/2008 |
| 7343139 | Device for converting frequencies, method of calibrating said device and system for transmitting/receiving electromagnetic signals comprising such a device The invention relates to a device for converting frequencies comprising a local oscillator of fixed frequency and a first mixer with two inputs and an output, a first input receiving the signal to be converted and a second input receiving the signal arising from the... | 03/11/2008 |
| 7340224 | Devices for reducing the dynamic range of signals in transmitters of communication systems A device reduces the dynamic range of a signal at a first point along a signal processing direction in a transmitter of a communication system. The device includes an input to which an input signal is applied, a correction prediction device, a delay device, an addit... | 03/04/2008 |
| 7327991 | Pulse modulation circuit Provided is a pulse modulation circuit that improves the on/off operation and improves the on/off ratio of an output power of the entire pulse modulation circuit in the switching operation. The pulse modulation circuit inputs a local oscillation wave and a DC pulse ... | 02/05/2008 |
| 7315525 | Change of frequency range in a communications system The object of the invention is a method for changing the frequency band used by a mobile station in a mobile station system. The invention is based on the idea that instead of using a fixed threshold value to change the frequency band, it is replaced with a variable... | 01/01/2008 |
| 7308234 | Feedforward spur cancellation approach using low IP amplifier A power amplifier circuit (40) that includes an error correction loop (44) having a lower IP3 error correction amplifier (54) than a main power amplifier (46) in a main signal path (48). A first attenuator (52) in the error ... | 12/11/2007 |
| 7305041 | Peak suppression of multi-carrier signal with different modulation A technique for peak suppression, phase and amplitude equalizer of multi-carrier signals with different modulation is described. The input to the multi-carrier power amplifier is modified by a peak suppression, phase and amplitude equalizer circuit prior to being ap... | 12/04/2007 |
| 7292547 | Device and method for nodal multiple access into communications channels A nodal division multiple access technique for multiple access to a communications channel such as a satellite transponder. The present invention provides multiple access into a communications channel where each accessing site utilizes one signal from a composite am... | 11/06/2007 |
| 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 |
| 7280805 | LO leakage and sideband image calibration system and method A system or method for calibrating an RF transmitter includes inputting a test tone to the RF transmitter. LO leakage calibration is performed on an output of the RF transmitter with the test tone inputted thereto, in order to determine a minimum LO leakage. Thereaf... | 10/09/2007 |
| 7274270 | Resonator matching network An input-matching network including an acoustic resonator providing a virtual impedance to match impedance between a first component and second component. As an example, the first component may be an antenna and the second component may be an amplifier. The acoustic... | 09/25/2007 |
| 7272417 | Systems and methods for implementing fully redundant antenna hopping with multi-carrier power amplifiers and combining schemes within a base station A Transmit Diversity Redundancy controller dynamically mediates implementation of diversity and antenna hopping by detecting and remediating faults on antenna branches while minimizing the capital investment required. The controller monitors the equipment along the ... | 09/18/2007 |
| 7239843 | Method for the interference-free communication during the operation of a jamming transmitter The participants of a friendly communication system use so-called time windows in the interference pattern for the communication and transmission among each other. These time windows are preset ahead of time in the communication system by the jamming transmitter or ... | 07/03/2007 |
| 7224942 | Communications system employing non-polluting pilot codes Transmitting non-polluting dummy pilot signals in a wireless communication network permits estimation of the downlink propagation channels between a number of joint transmitters and a lesser number of receivers. With fewer receivers than transmitters, loop back info... | 05/29/2007 |
| 7215221 | Harmonic termination circuit for medium bandwidth microwave power amplifiers A compact amplifier output bias circuit is used as a broadband harmonic termination. The bias circuit is adapted as a harmonic termination circuit to produce an effective low impedance or act as a load at the signal harmonic frequencies while having the capability o... | 05/08/2007 |
| 7209726 | Switch in UHF bandpass By using ICs with combined inputs for the VHF-high bandpass circuit and the UHF bandpass circuit, undesirable resonances occur which are caused by one of the tuned circuits. The problem is solved by providing a switching means for decoupling the UHF bandpass circuit... | 04/24/2007 |
| 7200166 | Dual-mode transceiver for indoor and outdoor ultra wideband communications A dual-mode ultra wideband (UWB) communication transceiver is presented to implement two disparate systems for indoor and outdoor UWB operations. During an operation mode, the dual-mode UWB communication transceiver sends and receives indoor or outdoor UWB signals u... | 04/03/2007 |
| 7196578 | Amplifier memory effect compensator An input signal is modified to compensate for amplifier memory effects by combining at least two versions of the input signal, each version of the input signal being offset in time with respect to one another. More specifically, an RF input signal is split into at l... | 03/27/2007 |
| 7184583 | Image system for processing image data An image system for processing image data in the form of grey-scale value signals and for generating an image that can be displayed on a presentation device, in particular for a medical diagnostic device, has a circuit to harmonize the image data. This circuit is fa... | 02/27/2007 |
| 7176769 | Harmonic termination circuit for medium bandwidth microwave power amplifiers A compact amplifier output bias circuit is used as a broadband harmonic termination. The bias circuit is adapted as a harmonic termination circuit to produce an effective low impedance at the signal harmonic frequencies while having the capability of supplying DC po... | 02/13/2007 |
