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Telecommunications > Transmitter And Receiver At Same Station (e.g., Transceiver) > With Frequency Stabilization (e.g., Automatic Frequency Control) > Synthesizer SynthesizerSynthesizer patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.03/01/07 - 20070049212 - 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 locked loop (PLL) and an integrated voltage controlled oscillator (VCO). The frequency ... 02/15/07 - 20070037527 - Equal duty cycle frequency divider The invention relates to a frequency divider (1), in particular for radio frequency (RF) applications, wherein the division ratio can be expressed by an—preferably odd numbered—integer divisor. The frequency divider (1) comprises an input circuit (10), which receives an input signal (5) as well as a first output signal (25). ... 02/01/07 - 20070026816 - High frequency synthesizer circuits and methods Embodiments of the present invention include a frequency synthesizer comprising a first plurality of dividers receiving a first signal having a first frequency and generating a first plurality of divided signals and a frequency combination network including a plurality of mixers, the frequency combination network receiving one or more of ... 01/18/07 - 20070015471 - Single oscillator transceiver A frequency plan is provided for particular use in a transceiver. Advantageously, a single oscillator may be used to generate desired frequency signals. One or more power splitters receive the signal and equally divide the signal into first and second signals having a frequency substantially equal to the original. Multipliers ... 12/21/06 - 20060286939 - Local signal generation circuit The present invention relates to miniaturization of a local signal generation circuit to supply signals to a frequency converter in communication terminals such as a transmitter, a receiver, a transmitter-receiver, and the like that use one or more frequency bands. The local signal generation circuit comprises first and second oscillators ... 12/07/06 - 20060276142 - 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, and a frequency synthesizer generating a local oscillator signal. A first signal having first ... 11/23/06 - 20060264181 - Reduced-size vco/pll module A reduced-size VCO/PLL module including a circuit board having a plurality of components positioned, mounted and interconnected thereon in a manner allowing the same to fit in a 10.5 mm×14 mm×2.9 mm package. In one embodiment, an inner lid encloses the VCO portion of the module. In all embodiments, an ... 11/16/06 - 20060258299 - Dual band frequency synthesizer The invention relates to a dual band frequency synthesizer for generating either a first output frequency fhigh or a second output frequency flow, where fhigh=2 flow, comprising an oscillator circuit for generating at its output a frequency fVCO=(fhigh+flow)/2, a divide by three (3) circuit, coupled to the output of the ... 10/19/06 - 20060234649 - Mobile communication device It is an object of the present invention to accomplish a frequency synthesizer portion capable of simultaneous operations for transmission and reception with a simple configuration. A mobile communication device associated with the present invention has a frequency-switchable first VCO (11) for creating local oscillator signals for transmission and reception, ... 10/05/06 - 20060223455 - System and method for wireless communication using low-pulling digital interface signals The digital interface between the baseband section and the RF transceiver section of a wireless communication device may cause undesired pulling to an impedance sensitive portion of the RF transceiver section. In one embodiment, an original interface signal that exhibits a duty cycle is modified by an interface control block ... 10/05/06 - 20060223454 - Precise frequency generation for low duty cycle transceivers using a single crystal oscillator An apparatus and method for calibrating a non-crystal oscillator in a transceiver unit using a crystal-oscillator includes the step of establishing a time base based upon oscillations of the crystal oscillator. A comparison of the number of oscillations for the non-crystal oscillator and the crystal oscillator is made during a ... 09/28/06 - 20060217077 - Radio frequency device with null or quasi-null intermediate frequency minimizing interfering frequency modulation applied to an integrated local oscillator A frequency transposition device is connected to a local main oscillator. The main oscillator is incorporated inside a main phase locked loop whereof the reference frequency is supplied by a voltage-controlled auxiliary oscillator, which is itself incorporated into an auxiliary phase locked loop. The reference frequency of the auxiliary phase ... 09/21/06 - 20060211381 - 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 Converter (DAC), a low pass filter and a phase ... 07/27/06 - 20060166627 - Staged locking of two phase locked loops Data synchronization is achieved in devices which transmit and/or receive audio and/or video data through the staged locking of phase locked loops. According to an exemplary embodiment, a transmitter includes a serial data source. An encoder provides encoded data and includes a first PLL. A controller includes a second PLL ... 07/20/06 - 20060160492 - Pll frequency synthesizer architecture for low phase noise and reference spurs A frequency synthesizer for use in a transceiver generates a relatively high reference frequency with fine frequency resolution and low in-band phase noise by using a digital processor to generate a digital reference signal at a finely-tuned reference frequency. A Digital-to-Analog Converter (DAC) converts the digital reference signal to an ... 07/13/06 - 20060154616 - Method and device for generating a signal by fractional frequency locked loop A method in accordance with the invention may include a cyclical succession of measurement phases and of correction phases. The correction phase may include a deactivation of a frequency divider and a correction of the control of an oscillator on the basis of the error signal, with the output signal ... 07/06/06 - 20060148421 - Method and apparatus for frequency adjustment A method and an apparatus for shifting a resonance frequency in response to an operating frequency are provided. The present invention retrieves a control signal, from a frequency synthesizer, indicative of a difference between the operating frequency and a predetermined frequency, decodes the control signal to generate a tuning signal ... 06/29/06 - 20060141942 - Wireless stereo synchronizaing transceiver A wireless stereo synchronizing transceiver is disclosed to include a receiving processing unit having a mixer circuit, a transmitting processing unit, which has a stereo modulating mixing circuit and a first voltage control oscillator circuit connected to the stereo modulating mixing circuit, and a synchronizing processing unit, which has a ... 05/04/06 - 20060094374 - Frequency synthesizer and synthesis method for generating a multiband local oscillator signal A phase locked loop (PLL) frequency synthesizer to produce a local oscillator signal for a transmitter for operation at a plurality of RF frequency bands that are disparate. The transmitter has an intermediate frequency that is a sizable fraction of the bandwidth of one or more of the RF bands. ... 03/02/06 - 20060046663 - Frequency synthesizer and frequency synthesis method A dual frequency synthesizer includes a reference oscillator, an R counter, a first fractional-N phase-locked loop (for a receiving channel) and a second fractional-N phase-locked loop (for a transmitting channel) and one shared sigma-delta modulator. The reference oscillator outputs a reference oscillation frequency clock. The R counter outputs a reference ... 02/16/06 - 20060035599 - 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 a low-frequency band as another unit synthesizer, and an arithmetic ... 02/16/06 - 20060035598 - 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 a low-frequency band as another unit synthesizer, and an arithmetic ... 02/16/06 - 20060035597 - Linearized fractional-n synthesizer having a gated offset A linearized oscillation synthesizer includes a phase and frequency detection module, charge pump circuit, low pass filter, voltage control oscillator, and a feedback module. The phase and frequency detection module is operably coupled to produce a charge-up signal, a charge-down signal, and an off signal based on phase and/or frequency ... 12/15/05 - 20050277386 - Pll circuit and high-frequency receiving device A PLL circuit has (i) a counter which divides a frequency of a VCO output whose frequency has been divided by a frequency divider and (ii) a memory which stores plural patterns of set cycles of the counter. The memory reads out one of the set cycles designated by a ... 11/03/05 - 20050245200 - Frequency multiplier pre-stage for fractional-n phase-locked loops A WLAN (Wireless Local Area Network) communication device comprising a WLAN frequency synthesizer for generating a synthesizer signal suitable for modulating a transmission signal and/or demodulating a reception signal and corresponding methods and integrated circuit chips are provided. The WLAN frequency synthesizer comprises a reference oscillator for generating a first ... 10/13/05 - 20050227630 - System for synchronizing a portable transceiver to a network A system for synchronizing a portable transceiver to a network is disclosed. Embodiments of the system for synchronizing a portable transceiver to a network include a crystal oscillator, a frequency synthesizer adapted to receive an output of the crystal oscillator, logic coupled to the crystal oscillator, the logic configured to ... 09/08/05 - 20050197073 - Fractional frequency synthesizer A frequency synthesizer circuit generates an output clock signal having a desired frequency relationship with an input reference signal, and offers essentially arbitrary relational values and adjustment resolution within any applicable circuit limits. The frequency synthesizer includes a ring oscillator circuit that provides multiple phases of its output clock signal, ... 08/25/05 - 20050186918 - Rf integrated circuit comprising a frequency synthesizer not very sensitive to injection locking The present invention relates to an RF integrated circuit comprising a frequency synthesizer and a QAM modulator for modulating a baseband signal of frequency FBB, the frequency synthesizer supplying to the QAM modulator an output signal of frequency F1 adjustable with a frequency step ΔF1, for forming a carrier signal ... 07/14/05 - 20050153662 - Sigmadelta modulator for pll circuit A ΣΔ modulator for producing a modulation signal for modulating a frequency division ratio of a comparison frequency divider of a PLL circuit. A plurality of integrators connected in series integrate an input signal and output overflow signals when the integrated value has exceeded a predetermined value. Differentiators transfer the ... 06/30/05 - 20050143018 - Communication resource management device A communication resource management device changes the transfer rate of a first control channel related to a first mobile terminal according to a communication condition. The device determines whether there is a frequency band for which it is not determined whether the frequency band is to be used in a ... ### FreshPatents.com Support |