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| Number | Title | Issue Date |
| 8041310 | Apparatus and methods for frequency control in a multi-output frequency synthesizer Methods and circuits for synthesizing two or more signals phase-locked to a common reference frequency signal are disclosed. In one embodiment, a method comprises generating first and second output signals phase-locked to a reference clock signal, using first and se... | 10/18/2011 |
| 8005436 | Method and system for integrated bluetooth transceiver, FM transmitter and FM receiver An integrated circuit may enable transmission and reception of Bluetooth signals as well as FM signals. One or more clock signals may be generated via a phase-locked loop and may be utilized to enable Bluetooth transmission and reception. Bluetooth clock signals and... | 08/23/2011 |
| 8005437 | Fully integrated micro-strip VCO A radio transceiver device includes circuitry for radiating electromagnetic signals at a very high radio frequency both through space, as well as through wave guides that are formed within a substrate material. In one embodiment, the substrate comprises a dielectric... | 08/23/2011 |
| 7995971 | Method and system for clocking FM transmit FM receive, and near field communication functions using DDFS Methods and systems for clocking FM transmit, FM receive and near field communication functions using DDFS are disclosed. Aspects of one method may include generating a Bluetooth signal that may comprise, for example, I and Q components, or Bluetooth local oscillato... | 08/09/2011 |
| 7945217 | Multi-mode baseband-IF converter A configurable frequency conversion device includes an up-converter, which is arranged to convert an input transmit signal to an interim transmit signal at an intermediate transmit frequency and to convert the interim transmit signal to an output transmit signal at ... | 05/17/2011 |
| 7929919 | Systems and methods for a PLL-adjusted reference clock A system is provided, the system includes a phase-locked loop (PLL) that multiplies a reference clock input to generate a communication link clock signal. The system also includes a transmitter/receiver (TX/RX) module coupled to the PLL, the TX/RX module is configur... | 04/19/2011 |
| 7925222 | Method and system for simultaneous FM transmission and FM reception using a shared antenna and a direct digital frequency synthesizer Certain aspects of a method and system for simultaneous FM transmission and FM reception using a shared antenna and a direct digital frequency synthesizer (DDFS) may be disclosed. In a FM transceiver that receives FM signals at a frequency f1 and transmit... | 04/12/2011 |
| 7912428 | System and method providing variable-frequency IF conversion in a multimode communication device A system and method providing variable-frequency IF conversion in a multimode communication device. Various aspects of the present invention provide a multimode communication device comprising at least one RF signal receiver adapted to receive at least a first RF si... | 03/22/2011 |
| 7894778 | LO generator to reject unwanted sideband According to an example embodiment, an apparatus is provided in a wireless transceiver. The apparatus may include a circuit configured to generate a first frequency signal (e.g., a VCO signal). A local oscillator (LO) generator may be provided that includes a freque... | 02/22/2011 |
| 7869769 | Method and apparatus for reconfigurable frequency generation A frequency generator (100) takes a signal source (clock or carrier) (101) and generates a edge encoded direct digital modulated differential output signal (110). The differential signal (110) is applied to a frequency extension quadratur... | 01/11/2011 |
| 7860464 | Method and system for a programmable local oscillator generator based on quadrature mixing using a phase shifter Methods and systems for a local oscillator generator based on quadrature mixing using a phase shifter. Aspects of one method may include generating a local oscillator signal, where a frequency of the local oscillator signal may be determined by controlling a phase o... | 12/28/2010 |
| 7856212 | Millimeter-wave phase-locked loop with injection-locked frequency divider using quarter-wavelength transmission line and method of calibration Embodiments of a millimeter-wave phase-locked loop with an injection-locked frequency divider (ILFD) are generally described herein. Other embodiments may be described and claimed. In some embodiments, the ILFD uses a quarter-wavelength transmission line. A method o... | 12/21/2010 |
| 7840190 | Frequency source synchronization and redundancy A system and method for ensuring proper synchronization of a plurality of frequency sources used in reception diversity-based radio reception. The frequency sources are concatenated in a synchronization loop, through which one frequency source having a high performa... | 11/23/2010 |
| 7835706 | Local oscillator (LO) port linearization for communication system with ratiometric transmit path architecture An RF transmitter (104) includes a shared local oscillator circuit (126), transmit path circuitry (120, 122, 124), a divider (134), and a lowpass filter (322). The shared local oscillator circuit (126) generates a shared LO ... | 11/16/2010 |
| 7809338 | Local oscillator with non-harmonic ratio between oscillator and RF frequencies using wideband modulation spectral replicas 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 presented are operative to generate I and Q square waves at a designated ... | 10/05/2010 |
| 7792497 | Method and apparatus for frequency synthesizing A method and an apparatus for frequency synthesizing are provided for a wireless communication system. In a frequency synthesizer, a phase lock loop (PLL) circuit generates a first elemental frequency based on a reference frequency and a unity frequency. A first div... | 09/07/2010 |
| 7778610 | Local oscillator with non-harmonic ratio between oscillator and RF frequencies using XOR operation with jitter estimation and correction 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 presented are operative to generate I and Q square waves at a designated ... | 08/17/2010 |
| 7773954 | Device and method for synthesizing transmission frequency in wireless terminal A device and method for synthesizing a transmission frequency (a Tx frequency) in a wireless terminal are provided, which are designed for stably operating a Phase Locked Loop (PLL) in order to synthesize a Tx frequency for a certain channel. The device includes a R... | 08/10/2010 |
| 7773953 | Wireless transceiving apparatus for variability of signal processing band Provided is a wireless transceiving apparatus for variability of signal processing band, in which at least one resonator of an analog processor and a VCO are simultaneously controlled using a frequency synthesizer, and a frequency of the VCO and a resonance frequenc... | 08/10/2010 |
| 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 presented are operative to generate I and Q square waves at a designated ... | 07/13/2010 |
| 7715802 | Frequency synthesizer and multi-band radio apparatus using said frequency synthesizer There is disclosed a frequency synthesizer having an HF synthesizer for generating a first reference frequency signal having a variable frequency in a high-frequency band as a unit synthesizer, an LF synthesizer for generating a second reference frequency signal in ... | 05/11/2010 |
| 7711328 | Method of and circuit for sampling a frequency difference in an integrated circuit A method of sampling a frequency difference in an integrated circuit is disclosed. The method comprises the steps of receiving a clock signal in a first clock domain; comparing a count of the clock signal in the first clock domain to a predetermined value N; convert... | 05/04/2010 |
| 7706755 | Digital, down-converted RF residual leakage signal mitigating RF residual leakage The present invention provides an RF transmission leakage mitigator for use with a full-duplex, wireless transceiver. In one embodiment, the RF transmission leakage mitigator includes an inversion generator configured to provide an RF transmission inversion signal o... | 04/27/2010 |
| 7702292 | Jitter reduction circuit and frequency synthesizer The jitter reduction circuit to reduce phase noise in a pulse train, comprises: —a resettable integrator (70) to integrate the pulse train, —a comparator (72) to compare the integrated pulse train with a reference level and to generate a modified p... | 04/20/2010 |
| 7684764 | Duplexer using surface acoustic wave filters and electronic device equipped with the same A duplexer includes two surface acoustic wave (SAW) filters having different center frequencies; a phase matching circuit that matches phases of the two SAW filters; a package in which the SAW filters and the phase matching circuit are housed, the package being comp... | 03/23/2010 |
| 7672645 | Programmable transmitter architecture for non-constant and constant envelope modulation Transmitter architectures designed to accommodate both constant and non-constant of envelope modulation schemes and capable of providing local oscillator carrier frequencies within any one of numerous desired frequency bands, thus allowing compliance with many diffe... | 03/02/2010 |
| 7653359 | Techniques to decrease fractional spurs for wireless transceivers Various embodiments are disclosed relating to techniques to reduce spurs in wireless transceivers. In an example embodiment, a first fractional-N divide ratio for a first frequency synthesizer may be set based on a selected channel. A second fractional-N divide rati... | 01/26/2010 |
| 7650119 | Wireless communication system and method using digital calibration to control mixer input swing A wireless communication device is disclosed wherein the voltage swing of a local oscillator (LO) signal is controlled to prevent overstressing semiconductor devices in a mixer to which the LO signal is supplied. A quadrature divider supplies the LO signal to the mi... | 01/19/2010 |
| 7634237 | Method and system for a fractional-N synthesizer for a mobile digital cellular television environment Aspects of a method and system for a fractional-N synthesizer for a mobile digital cellular television environment are presented. Aspects of the system may include circuitry, within a phase locked loop, that enables determination of a division number at a time insta... | 12/15/2009 |
| 7613430 | Dual synthesizer RF frequency plan optimized for interference avoidance Using separate synthesizers in a radio frequency (RF) device can facilitate avoiding interference. Specifically, a first synthesizer can be programmed to generate a first output frequency signal having an Frf frequency. A second synthesizer can be programmed to gene... | 11/03/2009 |
| 7593695 | RF transceiver incorporating dual-use PLL frequency synthesizer A dual-use PLL frequency synthesizer for use in a transceiver is capable of operating as a local oscillation generator in a receiving mode and as a transmitter in a transmitting mode. The PLL frequency synthesizer includes a digital processor, a Digital-to-Analog Co... | 09/22/2009 |
| 7570925 | Discrete amplitude calibration of oscillators in frequency synthesizers In one embodiment, this disclosure describes a frequency synthesizer for use in a wireless communication device, or similar device that requires precision frequency synthesis but small amounts of noise. In particular, the frequency synthesizer may include a phase lo... | 08/04/2009 |
| 7570926 | RF transceiver with compact stacker mixer design for multiple frequency conversion A single chip radio transceiver includes circuitry that enables received wideband RF signals to be down-converted to baseband frequencies and baseband signals to be up-converted to wideband RF signals prior to transmission without requiring conversion to an intermed... | 08/04/2009 |
| 7570924 | High frequency signal receiving device A high frequency signal receiving device includes a reference frequency signal generating section operable to generate a reference frequency signal; a high frequency signal processing section operable to obtain a signal of a desired channel from a high frequency sig... | 08/04/2009 |
| 7519332 | Radio-frequency radiocommunication apparatus A radiocommunication apparatus includes a transmitting device and a receiving device. The transmitting device includes a first local oscillation section for selecting a frequency for a first local oscillation signal from a plurality of predetermined frequencies in o... | 04/14/2009 |
| 7502595 | Radio equipment communicatable in two frequency bands and method for generating local oscillator signal in radio equipment Radio equipment enabling radio communication with frequency conversion corresponding to signals of different frequency bands is disclosed. A local oscillator signal generator included in this radio equipment having a first signal generator, a second signal generator... | 03/10/2009 |
| 7496331 | Oscillation device and oscillation method An oscillation device, includes: an oscillator circuit that generates an oscillation signal based on a direct current voltage to be inputted, the oscillation signal being provided with a specification requested by a supplied device that is supposed to receive a supp... | 02/24/2009 |
| 7444164 | System and method for radios using common equipment packaging A wireless communication system operating in a predetermined frequency range comprising a plurality of radios each having an enclosure configured to accept a common equipment assembly comprising a transmitter module, a receiver module, a synthesizer module, and an i... | 10/28/2008 |
| 7433653 | Transmitter and semiconductor integrated circuit for communication A transmitter adopting a polar loop system including a phase control loop for controlling the phase of a carrier signal outputted from a transmitting oscillator and an amplitude control loop for controlling the amplitude of a transmitting output signal outputted fro... | 10/07/2008 |
| 7424271 | Multi-mode and multi-band RF transceiver and related communications method A multimode communications system includes a first communications module, a transmission module, a switch and a second communications module. The first communication module has a frequency modulator for modulating a dividing ratio to adjust an oscillating signal and... | 09/09/2008 |
