Matches 1 - 50 out of 75 1 2 >


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US20100311362 Gain compensation device over temperature and method thereof  
A gain compensation device for adjusting gain of an amplifier over temperature is disclosed. The gain of the amplifier is controlled by signals on a gain control end of the amplifier. The gain...
US20110237206 SWITCHED POWER AMPLIFIER TOPOLOGY PROVIDING HIGH EFFICIENCY  
A switched power amplifier contained in a circuit is implemented to receive a single-ended input signal and generate a single-ended output signal, the single-ended output signal being a...
US20060258307 Radio-Frequency IC for a Mobile Radio Transmitter  
A radio-frequency IC (3) for a mobile radio transmitter (1) has an analogue/digital converter unit (5) for digitizing baseband signals (AB), a recovery unit (6, 7, 8, 9, 10) for recovering...
US20070238421 Transmitter architecture  
A technique includes digitally generating orthogonal modulated signals, each of which has spectral energy that is generally centered at an intermediate frequency. The orthogonal modulated signals...
US20090170452 Integrated RF-IF converter  
A frequency conversion apparatus includes a frequency generation circuit, which is based on a first semiconductor material having a first elemental composition and is coupled to generate one or...
US20080274703 CIRCUIT AND METHOD  
Implementations related to circuits including an oscillator and a switch-mode DC/DC converter are presented herein.
US20090258605 Transmitter and Transceiver, in particular for Mobile Radio, and Transmission Method  
A receiver, in particular for mobile radio, includes a receiver branch with a mixer, downstream of an analog/digital converter. A reference generator generates a reference clock, which is fed to...
US20090253390 WCDMA TRANSMIT ARCHITECTURE  
Wideband-Code Division Multiple Access (W-CDMA) transmit architecture. A baseband digital processing module operates cooperatively with an analog signal processing module to effectuate highly...
US20150038095 TRANSMIT ARCHITECTURE FOR WIRELESS MULTI-MODE APPLICATIONS  
In one embodiment, an apparatus includes an upconversion unit configured to upconvert a baseband signal to a radio frequency (RF) signal. A plurality of baluns for a plurality of wireless bands...
US20050233710 High data rate transmitter and receiver  
A high-speed transmitter and receiver are provided. In one embodiment, a transmitter comprises a baseband processor structured to receive data and to convert the data into a multiplicity of high...
US20110105057 HARMONIC GENERATION OF A FUNDAMENTAL FREQUENCY SYSTEM AND METHOD  
A system and method for generating for efficiently obtaining a desired harmonic from a fundamental frequency the prior art is needed. The system and method of the present invention produces a...
US20050009477 System and method for an upconverter for stacked intermediate frequency carriers  
A system for outputting a broadband signal outputs a number of input channel streams. The input channel streams first arrive at the system in a digital format. There the input channel streams are...
US20070184808 Method and device for transmitting speech signals via a data telecommunications network  
In the case of a device for transmission of telephone signals via a data telecommunications network (2) the analogue signals of a telephone terminal are converted to digital signals for...
US20100022196 TRANSMITTER DEVICE WITH QUASI-CONSTANT LO LEAKAGE, FOR WIRELESS COMMUNICATION EQUIPMENT WITH A DIRECT CONVERSION ARCHITECTURE  
A transmitter device for wireless communication equipment, comprises at least one path (Pl) comprising i) a low-pass filter (LPF 1+, LPFl−) for filtering differential signals and applying a chosen...
US20060009173 Step-up frequency converter  
A step-up frequency converter includes a first and a second input for two input signals that are to be mixed, the first input signal having a lower frequency than the second input signal, a first...
US20100056084 Frequency Conversion Based on Gated Information Signal  
A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the...
US20080064344 SELF-CALIBRATING DIRECT CONVERSION TRANSMITTER WITH CONVERTING/STEERING DEVICE  
A converting/steering device has a normal mode and a calibration mode. The converting/steering device includes a merged mixer/VGA and a mode controller. The merged mixer/VGA has a mixing stage and...
US20090318098 MULTI-FREQUENCY TRANSMITTER FOR A METAL DETECTOR  
A method for generating a transmit signal for transmission including the steps of a) generating at least two selected rectangular wave signals, each having a different fundamental frequency; b)...
US20050287964 Wireless transmitter circuit and transceiver using the same  
This invention provides a wireless transmitter circuit for mobile communication apparatus and this circuit can be configured with fewer components and is suitable for downsizing. A single PLL...
US20060240787 Data transmitter and data transceiver incorporating SAW filter  
The invention relates to a data transmitter and a data transceiver incorporating a passive device such as a SAW filter, which can modulate frequency by using the SAW filter in order to transmit...
US20110189965 Differential to Single-Ended Converter  
Embodiments enable a multi-band transmitter with significantly reduced architecture area by allowing maximum reuse of transmitter stages across supported frequency bands and signal standards....
US20090036069 LO 2LO Upconverter For An In-Phase/Quadrature-Phase (I/Q) Modulator  
An upconverter includes a switching architecture configured to receive an input signal, a first local oscillator (LO) signal, and a second local oscillator (2LO) signal that is at a frequency that...
US20120046004 High performance transmitter preamplification chain with calibration feedback  
According to one embodiment, an improved preamplification chain for implementation in a transmitter comprises a frequency conversion stage for up-converting a baseband signal to a transmit signal,...
US20070178855 Large scale bi-directional user terminal with configurable transmission frequencies  
The invention proposes an upgradeable product enabling a single circuit to be produced and very easily configured in the factory for a lower production cost. The minimisation of the...
US20090111390 RADIO COMMUNICATIONS SYSTEM DESIGNED FOR A LOW-POWER RECEIVER  
The invention relates to methods by which radio signals can be transmitted to, and received by, a radio receiver such that the receiver consumes very little power from a battery or energy source....
US20050227638 Microwave band radio transmission device, microwave band radio reception device, and microwave band radio communication system  
An input modulation signal wave 108a is frequency-upconverted to an intermediate frequency signal wave by a frequency mixer 3. By adding a reference signal wave to the intermediate frequency...
US20090258615 Compensation of an asymmetric frequency response of a radio  
A method and apparatus of compensating for an asymmetric frequency response of a radio are disclosed. One method includes estimating a slope control signal, the slope control signal indicating a...
US20090291652 FILTER CIRCUIT, WIRELESS TRANSMITTER, AND WIRELESS RECEIVER  
A filter circuit is constructed of a passive mixer and a frequency response device. The passive mixer generates a frequency-converted signal by mixing an input signal transmitted through a...
US20050202790 Data converter device and data conversion method, and transmitter circuit, communications device and electronic device using the same  
The present invention aims to provide a transmitter circuit that is capable of suppressing quantization noise and operating with a high efficiency, a data converter section 13 and a data...
US20060154624 Transmission device, transmission method , and storage medium  
Disclosed is a method that preferably performs transmission processing to a time sequence signal of a known pattern as the pre-amble and an OFDM transmitted signal. In data communications, the...
US20080220733 Fast frequency range selection in ranged controlled oscillators  
Methods and apparatus for fast frequency range selection in ranged controlled oscillators. An exemplary frequency range selection apparatus includes a ranged voltage controlled oscillator (VCO)...
US20060160500 VSAT block up converter (BUC) chip  
A Block Up Converter (BUC) chip includes a base board with opposing top and bottom metal layers and having radio frequency (RF) circuits at the top metal layer and ground and signal pads at the...
US20050020217 Communication terminal with low carrier feedthrough and communication system using such a terminal  
communication terminal (710) includes a coder (722, 724) receiving an input signal and having an output terminal for providing a coded signal; an upconverter core (100) having an input terminal...
US20090054017 Signal amplifier structure for radio transmitter  
There is provided a modular amplifier structure that includes a plurality of parallel amplifier sub-units. Each amplifier sub-unit is configured to amplify a received payload signal under control...
US20140162577 MULTIPLIER CIRCUIT AND WIRELESS COMMUNICATION APPARATUS USING THE SAME  
A multiplier circuit and wireless communication apparatus that adjust an output level of a desired multiple wave to a desired range is provided. The multiplier circuit includes a multiple wave...
US20150147988 MIXER  
A frequency shifter configured to shift the frequency of a signal, the frequency shifter comprising: a resonant structure configured to mechanically resonate at a first frequency; and a plurality...
US20050191985 Diode ring configuration for harmonic diode mixers  
A sub-harmonic mixer having at least one diode ring array used for up-conversion in a transmitter and for down-conversion in a receiver. Each diode ring array has a plurality of (e.g., four) diode...
US20070087711 Multiple band transceiver  
A frequency translation apparatus provides selective frequency translation of an input signal with reduced distortion effects. The frequency translation apparatus includes a plurality of mixers....
US20070149148 Phase modulation apparatus and wireless communication apparatus  
A two-point modulation type phase apparatus and a wireless communication apparatus capable of achieving a reduction in circuit scale and low power consumption while maintaining modulation...
US20080261650 Radio integrated circuit with integrated power amplifier  
A radio system includes a radio frequency (RF) integrated circuit (IC), a baseband digital signal processing (DSP) IC, and a serial digital interface coupling data there-between. In one embodiment...
US20070155348 Apparatus and method for ultra wide band architectures  
The present invention describes a transmitter/receiver architecture that uses a Weaver architecture in conjunction with digitally controlled adder/subtractor components to insert/extract a signal...
US20080014873 METHODS AND APPARATUS FOR ADAPTIVE LOCAL OSCILLATOR NULLING  
Methods and apparatus to adaptively null leakage from a local oscillator.
US20050282510 Linear mixer with current amplifier  
A linear mixer circuit with a current amplifier has an excellent linearity by using RF open-load and an improved current amplifier. Therefore, a voltage-current converting stage and a...
US20120178390 FILTER CIRCUIT, WIRELESS TRANSMITTER, AND WIRELESS RECEIVER  
According to one embodiment, a radio transmitter comprises a passive mixer that mixes the radio-frequency signal and a local oscillation signal, and outputs a mixed signal to the frequency...
US20060035606 Method and apparatus for transmitting and outputting data in voice communication  
Disclosed is a method and apparatus for transmitting and outputting data in voice communication over a traffic channel. The apparatus includes: a signal generator for generating a low frequency...
US20090253389 EFFICIENT POWER AMPLIFIER  
A technique for efficient power amplification includes providing multiple baseband signals to an amplifier. The signals may be converted to RF and combined through one or more impedance inverters.
US20130143501 COMMUNICATION DEVICE WITH IMPROVED INTERFERENCE REJECTION AND A METHOD THEROF  
A communication device is disclosed. The device may be in particular a radio transmitter and a receiver that can operate with low power consumption and with improved interference rejection,...
US20120238226 DATA TRANSMISSION COEXISTENCE USING CONSTANT SYMBOL DURATION WITHIN TELEVISION WHITE SPACE CHANNELS  
Methods, systems, and/or devices are provided that permit data transmissions over unused television channels. An unused channel within a television broadcast frequency spectrum is first...
US20090088095 AMPLIFIER, RADIO TRANSMITTING APPARATUS, AND RADIO RECEIVING APPARATUS  
An amplifier includes: an input terminal configured to have an input signal of a center frequency f0 input; a dividing unit that divides the input signal; first through ith blocks configured to...
US20120108188 SYSTEMS AND METHODS FOR IMPROVED POWER YIELD AND LINEARIZATION IN RADIO FREQUENCY TRANSMITTERS  
In one example system, the system comprises a linearizer module, a first upconverter module, a power amplifier module, a signal sampler module, and a downconverter module. The linearizer module...

Matches 1 - 50 out of 75 1 2 >