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8116716 Mobile wireless communications device having buffered clock distribution network for microprocessor and RF circuits  
A mobile wireless communications device includes a circuit board carried by a housing. A microprocessor, RF transceiver and circuitry are carried by the circuit board and operative with each other....
8060045 Method for compensating the non-linear distortions of high-frequency signals and device for carrying out said method  
The present invention refers to a method for compensating the non-linear distortions of high-frequency signals, especially when observing the amplitude modulated signals with narrow band receiver....
8060046 Radio receiver and radio reception method  
The radio receiver includes: a mixer configured to convert a received signal to an IF signal using a local oscillation signal; an IF processing section configured to limit the band of the IF...
8014477 Receiver employing selectable A/D sample clock frequency  
A receiver is set forth that includes a tuner circuit and a converter circuit. The tuner circuit provides an analog signal corresponding to a modulated signal that is received on a selected...
8010075 High order harmonics generator  
A high-order harmonics generator includes a plurality of high-pass filters to block out DC signals. In one embodiment, high-pass filters are coupled to the output signals from an envelope detector...
8010072 Charge pump current compensation for phase-locked loop frequency synthesizer systems  
A technique for improving frequency synthesizer performance by frequency-compensating charge pump current in order to maintain a consistent loop bandwidth over a wide operating frequency range is...
8005442 Wireless network connection system and method using injection locked oscillators  
A wireless network connection system remotely connects to a network without the use of crystal reference oscillators. This provides communication at long range using a low transmit Effective...
8000661 Communication system with frequency-adaptive predistorter design  
A communication system comprises a predistorter for distorting an input signal according to at least one parameter to generate a distorted signal, an amplifier for amplifying the distorted signal...
7974585 Method for performing a frequency correction of a wireless device  
A method of performing a frequency correction of a radio module. Multiple samples of frequency data during a quiescent portion of the base station transmission is taken to estimate the amount of...
7970875 System and method for computer originated audio file transmission  
A system and method for computer originated audio file transmission includes a server having a communications module operable to communicate with a terminal unit. The server may also include a...
7965728 Buffer for driving capacitive load  
A buffer circuit buffers incoming signals, from a local oscillator generator to a mixing circuit and has a push-pull circuit having two inputs, a first being coupled to a first incoming signal, and...
7929935 Wireless data communications using FIFO for synchronization memory  
A microprocessor system architecture is disclosed which allows for the selective execution of programmed ROM microcode or, alternatively, RAM microcode if there has been a correction or update made...
7885630 Mobile wireless communications device having buffered clock distribution network for microprocessor and RF circuits  
A mobile wireless communications device includes a circuit board carried by a housing. A microprocessor, RF transceiver and circuitry are carried by the circuit board and operative with each other....
7831197 Outside unit for satellite reception and method of reception with said unit  
The invention proposes an LNB using two transposition frequencies chosen on either side of the reception band so as to obtain a transposition of supradyne type and a transposition of infradyne type...
7796710 Digital signal demodulator and wireless receiver using the same  
A digital demodulator includes a resonator having a resonance frequency same as a carrier frequency to store a charge corresponding to a digital signal modulated by phase shift keying, a capacitor...
7756487 Local oscillator with non-harmonic ratio between oscillator and RF frequencies using pulse generation and selection  
A novel and useful apparatus for and method of local oscillator (LO) generation with non-integer multiplication ratio between the local oscillator and RF frequencies. The LO generation schemes...
7747236 Method and apparatus for estimating local oscillator frequency for GPS receivers  
The present invention is a method and apparatus that produces an estimate of the local oscillator (LO) frequency error using an external reference signal. The error estimate can be used for LO...
7707617 Dual mode tuner for co-existing digital and analog television signals  
A dual mode tuner/receiver is disclosed in which both analog and digital signals can be received and processed. A low pass filter allows all channels below a selected frequency enter the circuit. A...
7668524 Clock deskewing method, apparatus, and system  
An integrated circuit includes clock deskew circuitry. The deskew circuitry includes a loop circuit to align an input clock signal with an output clock signal, and also aligns transmitted data with...
7650132 Low noise amplifier (LNA) gain switch circuit  
A circuit is formed to steer current in and out of an inductive load in a manner that enables an amplifier to provide a plurality of gain steps without modifying an LC time constant for the circuit...
7643593 System and method for read data recovery in a serial interface  
A method for recovering data includes generating a plurality of out-of-phase clock signals. The method also includes generating samples of an incoming data signal, where a plurality of samples are...
7630698 Fast switching, dual frequency phase locked loop  
A fast switching, dual frequency phase locked loop comprising dual phase/frequency detectors, dual charge pumps, a pair of loop filters, and a low leakage voltage controlled oscillator. Each...
7627295 Downconverter and upconverter  
A downconverter and upconverter are provided which can obtain a sufficient image rejection ratio in a low-Intermediate Frequency (IF) scheme while reducing power consumption and can suppress Error...
7596112 Method and apparatus for rate compatible dirty paper coding  
A medium access control (MAC) entity first computes an achievable rate region based on a total transmit power limit and a channel gain of each of a plurality of WTRUs. Next, the MAC entity selects...
7587189 Determination and processing for fractional-N programming values  
Determination and processing for fractional-N programming values. The present invention is operable to receive a clock signal (CLK) and to transform that CLK into a new CLK, when necessary, for use...
7586382 Methods and systems for temperature related frequency drift compensation  
Systems and methods are provided that compensate for frequency drift due to temperature variation without the need for a temperature sensor. In one embodiment, a navigation receiver with an...
7565112 Reduced adjacent channel interference in a radio receiver  
A method for reducing adjacent channel interference begins by determining a desired channel of a radio frequency (RF) signal. The method continues by determining a plurality of potential local...
7558552 Integrated circuit and method of generating a bias current for a plurality of data transceivers  
Various embodiments of the present invention relate to circuits for and methods of generating a bias current for a plurality of data transceivers on an integrated circuit. According to one...
7391840 Phase locked loop circuit, electronic device including a phase locked loop circuit and method for generating a periodic signal  
A phase locked loop (PLL) circuit (1) comprising a loop input (11); a phase detector section (2) for detecting a phase difference between an input signal and a reference signal. The phase detector...
7373127 Digital beam forming for communications systems  
An antenna-receiver communications system and method is provided to mechanize multibeam mobile antenna-receive subsystems. Digital beam forming for modern wideband mobile communications systems is...
7369830 Monolithic GPS RF front end integrated circuit  
A highly integrated GPS RF Front End which uses a single conversion stage employs an image rejection mixer stage to eliminate the need for an image reject RF bandpass filter. Also a relatively high...
7349679 Integrated power amplifier  
A power amplifier develops a modulated high power signal by summing the outputs of multiple voltage controlled oscillators. A phase control circuit synchronizes the phase relationship of multiple...
7263138 Q-quenching super-regenerative receiver  
A super-regenerative receiver uses controlled Q-quenching and may limit the resonant tank circuit amplitude by loading the tank circuit as soon as regenerative oscillation is detected. An amplitude...
7251467 Telecommunications using a tunable oscillator  
Systems and techniques are disclosed relating to wireless communications. These systems and techniques involve wireless communications wherein a device may be configured to recover an information...
7228117 Frequency correction method and apparatus for correcting secular change  
In order to always maintain a frequency of an oscillator within a proper range, the frequency chages due to temperature and a secular change, a method is disclosed in which the secular change is...
7228118 Method of calibrating PLL frequency synthesizers to precise frequencies with low tolerance crystals in their master reference oscillators  
A frequency tracking circuit and method comprising a master crystal oscillator circuit is used for frequency tracking between a handset and a base station comprising a calibration subsystem for...
7215936 Super-regenerative receiver including phase-locked loop  
An improved low-cost super-regenerative receiver includes sampling phase-locked loop. Phase sampling is controlled by the quench signal (264). In the preferred embodiment, logic state HIGH to logic...
7196738 Tuner integrated circuit and television tuner using the same circuit  
One embodiment of a tuner integrated circuit includes two mixer circuits, an IF amplifier circuit, three oscillation circuits, a PLL circuit, and a reference oscillation circuit. A plurality of...
7177610 Calibrated low-noise current and voltage references and associated methods  
A low-noise current reference circuitry includes a voltage source, a current source, and a controller. The voltage source generates a reference voltage. The current source provides a low-noise...
7171183 Linearized fractional-N synthesizer having a current offset charge pump  
A linear fractional-N synthesizer includes phase and frequency detection module, a charge pump circuit, a loop filter, a voltage controlled oscillator, and a fractional-N divider. The phase and...
7162216 Wireless communication system  
A wireless communication system, which is provided with a PLL circuit having a plurality of oscillators and is capable of processing two or more transmit and receive signal different in frequency...
7154341 Communication semiconductor integrated circuit device and wireless communication system  
A communication semiconductor integrated circuit device includes an RFVCO and a TXVCO and is formed over one semiconductor substrate, and has a first operation mode (idle mode) which does not...
7155181 High sensitivity RF receiver and method for forming the same  
A method for improving sensitivity of a RF receiver and a RF receiver designed by the same are provided. The RF receiver, which receives a RF signal, comprises a sampling converting circuit, a...
7155174 Method and apparatus for compensating for frequency offsets caused by a free-running oscillator  
A transceiver includes a Downstream Signal Processor (DSP), an Upstream Signal Processor (USP), a Local Oscillator (LO), a differencer, a reference signal generator, and an estimator. The DSP...
7139530 Method and apparatus for calibrating a reference oscillator  
A method and apparatus for calibrating a reference oscillator and use of a calibrated reference oscillator is disclosed. To gain cost reduction advantages, a less accurate reference oscillator is...
7133647 Chiprate correction in digital transceivers  
A transceiver for a code division multiple access communication system comprises a receiver to receive coded information signals and a transmitter to transmit coded information signals. A local...
7103339 Automatic frequency correction method and receiver for time division duplex modes of 3G wireless communications  
A receiver for use in a wireless communication system includes a voltage controlled oscillator and estimating means for obtaining a frequency estimate to adjust the voltage controlled oscillator,...
7103338 Initial frequency synchronization mechanism  
Method for acquiring frequency of a desired channel having a carrier frequency FMAIN, for a dynamic receiver frequency FMOBILE, from a starting frequency FSTART, in the presence of high power...
7082295 On-chip loop filter for use in a phase locked loop and other applications  
A phase locked loop that includes such a loop filter, the phase locked loop includes a difference detector, programmable charge pump, fixed loop filter, voltage controlled oscillator and adjustable...
7082292 Mobile communications device with GPS receiver and common clock source  
A mobile communications device using a common oscillator for communication and global positioning system (GPS) functions. In one embodiment, a communications unit receives a precision carrier...
Matches 1 - 50 out of 148 1 2 3 >