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Telecommunications > Receiver Or Analog Modulated Signal Frequency Converter > Frequency Modifying Or Conversion > Particular Frequency Conversion Structure Or Circuitry Particular Frequency Conversion Structure Or CircuitryParticular Frequency Conversion Structure Or Circuitry 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 - 20070049236 - Frequency conversion apparatus and frequency conversion method for suppressing spurious signals A frequency conversion apparatus includes an SSB mixer and a signal input unit. The signal input unit includes a first input unit and a second input unit. The first input unit inputs a square wave signal to one of the input terminals of the SSB mixer. The second input unit ... 02/22/07 - 20070042744 - Quadrature frequency changer, tuner and modulator A quadrature frequency changer comprising first and second mixers and a local oscillator and a tuner and modulator including the quadrature frequency changer are provided. The local oscillator provides first and second commutating signals which are nominally in phase-quadrature and includes an arrangement for changing the phase of the first ... 02/15/07 - 20070037544 - Integrated rf circuits An on-chip response adjuster is based on an on-purpose generated and dominant transfer pole or zero of a signal response so as to provide a process-stable phase behavior of the circuitry. The signal response is defined directly by a passive frequency variant component (Lfold) and by transistor operation point, e.g. ... 01/25/07 - 20070021089 - Semiconductor device that suppresses variations in high frequency characteristics of circuit elements A semiconductor device includes a semiconductor substrate having a main surface, the main surface including a first and second areas formed with a high-frequency circuit element, and a third area located around the first and second areas and formed with a low-frequency circuit element. The semiconductor device also includes a ... 01/11/07 - 20070010230 - High dynamic range compact mixer output stage for a wireless receiver A mixer is disclosed having an output stage with an amplifier or gain device configured in a feedback loop to maintain a virtual ground at the input to the gain device. The gain device provides significant dynamic range, gain, and the appropriate impedance matching to insure a low noise output ... 01/04/07 - 20070004370 - Circuit and method for selectable high/low side injection in an intermediate frequency transceiver A method of communication between a first transceiver having a first local oscillator set at a first frequency and a second transceiver having a second local oscillator set at a second frequency disclosed. The method includes transmitting a first signal at a first frequency from the first transceiver to the ... 01/04/07 - 20070004369 - Mixer Provided is a mixer including: an amplifier amplifying an input signal using at least one amplifier element; a mixing unit mixing the input signal amplified by the amplifier with a local oscillator signal output from a local oscillator. The mixing unit includes at least one pair of switching elements switching ... 01/04/07 - 20070004368 - Mixer transconductance in rf transceiver An integrated circuit radio transceiver and method therefor comprises circuitry that is operable to up-convert an outgoing continuous waveform signal to RF and that is further operable to down-convert and ingoing RF signal to one of a baseband or intermediate frequency in a manner that provides a linearized output current ... 01/04/07 - 20070004367 - Gilbert mixers with improved isolation The employment of cascoding in connection with improving mixer isolation in a Gilbert mixer circuit. In this vein, there is broadly contemplated herein, inter alia, the provision of a mixer suitable for use in a direct-conversion radio receiver operating in the 57-64 GHz industrial, scientific, and medical (ISM) band. Such ... 12/28/06 - 20060293017 - Circuit and method for receiving and mixing radio frequencies in a direct conversion receiver A frequency mixing circuit and a frequency mixing method. The frequency mixing circuit includes first and second differential amplifiers, a subtracter and a mixer. The first differential amplifier amplifies a first pair of input signals having a first frequency to generate a first differential signal. The second differential amplifier amplifies ... 12/21/06 - 20060286957 - Direct conversion radio apparatus A direct conversion radio apparatus comprises a local oscillator which generates a high-frequency signal of almost the same frequency as that of a signal to be received, a modulator which modulates the high-frequency signal generated from the local oscillator in carrier sensing, mixers which frequency-convert a received signal into a ... 12/14/06 - 20060281433 - Method and apparatus for demodulation A demodulation method and apparatus are provided. An RF signal is down converted to generate a first in-phase signal and a first quadrature signal of a first frequency. Limiting amplification is performed on the first in-phase signal and the first quadrature signal to generate a second in-phase signal and a ... 12/14/06 - 20060281432 - Radio frequency tuner A radio frequency tuner includes a first quadrature frequency changer, I and Q filters which are electronically adjustable, and a second quadrature frequency changer. During alignment of the filters, an alignment controller connects a test tone generator to the input of the frequency converter and the generator supplies a sequence ... 12/14/06 - 20060281431 - Radio frequency tuner A radio frequency tuner comprises one or more tracking filters ahead of at least one frequency changer. A controller has a filter alignment mode and a reception mode. Each filter has one or more resonant networks comprising an inductance and a switched capacitor network which is digitally controlled for selecting ... 11/09/06 - 20060252401 - Systems and method for a highly linear, low power mixer A mixer for use in a transceiver comprises an LO switching pair and a folded transconductor. The mixer can be used as an upconversion or down conversion mixer and provides increased headroom and linearity, while still reducing current consumption. The mixer can be configured for differential inputs and outputs and ... 10/19/06 - 20060234666 - Mixer circuits and methods with matched bias currents Embodiments of the present invention include circuits and methods for improving the spectral purity of mixer circuits. In one embodiment the present invention includes a mixer circuit including a bias circuit, the bias circuit comprising a first transistor having a gate, a source, and a drain, wherein the drain is ... 10/19/06 - 20060234665 - Mixer circuits and methods with improved spectral purity Embodiments of the present invention include mixer circuits and methods with improved spectral purity. In one embodiment the present invention includes a mixer circuit comprising a first transistor having a gate, a source and a drain, a second transistor having a gate, a source and a drain, a first capacitance ... 10/05/06 - 20060223483 - Multiple band direct conversion radio frequency transceiver integrated circuit A multiple band direct conversion radio frequency (RF) transceiver integrated circuit (IC) includes a multiple band direct conversion transmitter section, a multiple band direct conversion receiver section, and a local oscillation module. The multiple band direct conversion transmitter section includes a transmit baseband module and a multiple frequency band transmission ... 10/05/06 - 20060223482 - Local oscillation routing plan applicable to a multiple rf band rf mimo transceiver Local oscillation circuitry for use in an RF transceiver Integrated Circuit (IC) includes local oscillation generation circuitry operable to produce a local oscillation and local oscillation distribution circuitry. The local oscillation distribution circuitry includes a splitting circuit, a first distribution portion, and a second distribution portion. The splitting circuit receives ... 09/28/06 - 20060217101 - Higher linearity passive mixer Transmission of a high frequency signal is provided by a passive mixer. The passive mixer receives a low frequency signal as an input. The passive mixer includes a plurality of transistors each with a gate, a source, and a drain. The passive mixer also includes a local oscillator connected to ... 09/21/06 - 20060211398 - Multiple intermediate frequencies receiver and a method thereof Embodiment of the invention provides a receiving device having an intermediate frequency section to produce first and second intermediate frequency signals based on first and second received radio frequency signals, such that said intermediate frequency signals are combinable to be jointly processed. The first intermediate frequency signal is antipodal to ... 09/21/06 - 20060211397 - Analogue mixer A mixer suitable for implementation in low voltage, low power CMOS employs a class AB transconductor to achieve analogue multiplication through simultaneous modulation of both the transconductor input and its internal voltage rail. ... 09/14/06 - 20060205379 - Signal reception enhancement apparatus, systems, and methods An apparatus and a system, as well as a method and an article, may include sensing a parameter value associated with noise in a mixer, such as the signal-to-noise ratio of a receiver, and adjusting the bias set-point of one or more mixer components in response to the sensed value ... 08/31/06 - 20060194559 - Radio-frequency circuit A radio-frequency circuit comprises a low-noise amplifier, an NMOS mixer for converting a radio-frequency signal output from the low-noise amplifier into an intermediate-frequency signal, a polyphase filter for removing image noises, and a PMOS mixer for converting the intermediate-frequency signal passed through the polyphase filter into a baseband signal. ... 08/17/06 - 20060183455 - Frequency synthesizer for mixing reference frequencies A frequency synthesizer for mixing reference frequencies using at least one control signal has a local oscillator, frequency dividers for dividing a frequency generated from the local oscillator and generating at least one control signal, and a single side band (SSB) mixer for mixing the reference frequencies, using the frequency ... 08/10/06 - 20060178125 - Receiver for wireless communication systems and i/o signal phase difference correction method therefor A receiver includes first switches for applying either differential signals of an oscillator or a data signal of a transmitter to down-converting mixers; a frequency conversion unit for mixing and applying to the down-converting mixers quadrature signals generated from an arbitrary clock signal generator and the oscillator, and having a ... 08/03/06 - 20060172718 - Mixer stage and method for mixing signals of different frequencies A mixer stage is provided that mixes a differential input signal with a differential square-wave signal of an oscillator, having a first amplifier element and a second amplifier element, each of which amplifier elements has a first current connection, a second current connection, and a connection for the differential input ... 07/20/06 - 20060160518 - Harmonic reject receiver architecture and mixer Receiver architectures and methods of processing harmonic rich input signals employing harmonic suppression mixers are disclosed herein. The disclosed receivers, mixers, and methods enable a receiver to achieve the advantages of switching mixers while greatly reducing the mixer response to the undesired harmonics. A harmonic mixer can include a plurality ... 07/06/06 - 20060148440 - Mixer circuit with bypass and mixing modes having constant even order generation and method of operation A mixer circuit configured to operate in a bypass or mixing mode, and which comprises a mixer core, and a mode select circuit. The mixer core includes first and second switches, each of which has an input, and first and second outputs. The mode select circuit is coupled to the ... 07/06/06 - 20060148439 - Mixer used in direct conversion transceiver and related method A frequency conversion apparatus for converting an input signal having an input frequency into an output signal having an output frequency. The frequency conversion apparatus includes a first multiplier and a gm stage. The first multiplier multiplies a first local signal having a first frequency with a second local signal ... 06/22/06 - 20060135109 - Mixer circuit, receiver comprising a mixer circuit, wireless communication comprising a receiver, method for generating an output signal by mixing an input signal with an oscillator signal The invention relates to a mixer circuit comprising an input node for receiving an input signal, a first output node 202, and a second output node 203, voltage to current conversion means and switching means operatively coupled to each other and to the input node, the first output node and ... 06/08/06 - 20060121872 - Frequency transceiver for controlling intermediate frequency There is provided a frequency transceiver for automatically controlling a TX/RX IF signal in a radar or a communication system, which transmits/receives an RF signal. The frequency transceiver includes a local oscillator for oscillating a VHF proportional to a VHF oscillation control voltage, a first IF processor for mixing an ... 05/18/06 - 20060105734 - 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 supply of the oscillation signal; a gate circuit provided in ... 05/04/06 - 20060094391 - Method and system for an analog zero-if interface for gsm receivers Certain embodiments for an analog zero-IF interface for GSM receivers, where a receiver may receive RF signals and downconvert the RF signal to a VLIF signal in the analog domain. The VLIF signal may be further downconverted to a baseband signal in the analog domain. The baseband signal may be ... 03/30/06 - 20060068746 - Direct conversion receiver radio frequency integrated circuit An integrated circuit includes an RF receiver has a direct-conversion down-converter and demodulator architecture with an integrated low noise amplifier (LNA) for operation in a frequency band of interest (cellular) and provisions for an off-chip LNA for operation in a second (higher) frequency band of interest (such as PCS). A ... 03/30/06 - 20060068745 - Combined automatic frequency correction and time track system to minimize sample timing errors A circuit including an analog to digital converter and a processor is disclosed. The analog to digital converter may be configured to generate a plurality of samples from a received signal in response to a reference signal. The processor may be configured to designate one of an early sample of ... 03/16/06 - 20060057999 - Mixer offset cancellation without generating i/q imbalance An offset cancellation scheme in which offset cancellation current is sourced into one differential branch of a driver circuit and sinked from the opposite differential branch. The source/sink arrangement allows for offset cancellation current to be introduced into the circuit, but the overall total average current remains substantially unchanged. When ... 03/09/06 - 20060052075 - Testing integrated circuits using high bandwidth wireless technology According to embodiments of the present invention, a UWB (ultra wideband) communication system is employed to wirelessly test and configure circuits on a die. Baseband signals may be utilized with resulting simplification in CMOS circuits, or orthogonal frequency division multiplexing may be employed to allow more than one communication channel. ... 02/23/06 - 20060040636 - Mixer capable of detecting or controlling common mode voltage thereof A mixer capable of detecting or controlling a common mode voltage thereof, includes at least: a mixing module for mixing a first set of differential signals and a second set of differential signals to generate at least one mixed signal; and a compensation module for compensating at least one operation ... 02/23/06 - 20060040635 - Signal reception front-end circuit, signal reception circuit, and communication apparatus comprising the same An average level detection circuit 10 outputs a level of an input signal of a baseband output signal or a mixer circuit. A smoothing circuit 11 removes an AC component from an output signal of the average level detection circuit 10. A reference comparison circuit 12 outputs a level suppression ... 02/16/06 - 20060035618 - Wireless data communication device A wireless data communication device is disclosed. A millimeter range mixer having a first immediate frequency port, a second reference port, and a millimeter wave port receives an intermediate frequency radio signal. A local oscillator source provides a reference signal to the reference port of the mixer, and using a ... 02/16/06 - 20060035617 - Intermediate frequency receiver with improved image rejection ratio An intermediate frequency receiver includes mixers for generating first and second IF signals from a RF signal and local oscillator signals. A magnitude calibration loop adjusts a gain of the first and/or second IF signals generated from the mixers depending on a magnitude difference between the IF signals. The phase ... 02/02/06 - 20060025101 - Adaptive mixer output filter bandwidth control for variable conversion gain down-conversion mixer An improved adaptive mixer for use in the down conversion module of a wireless transceiver. The adaptive mixer comprises a conversion gain module that is operable to receive a radio frequency signal and to generate an intermediate frequency that is provided to a radio interface in a wireless transceiver. The ... 02/02/06 - 20060025100 - Method to improve cmfb phase margin of variable-output-bandwidth mixer An improved method and apparatus for using common mode feedback to maintain a predetermined DC level for an intermediate frequency output signal. A common mode feedback capacitor-select switch module is operable to use a bandwidth control signal from a radio interface of a wireless device to selectively connect a plurality ... 01/19/06 - 20060014513 - Communication semiconductor integrated circuit device and a wireless communication system In a communication semiconductor integrated circuit device using offset PLL architectures and including an oscillator circuit and a frequency divider circuit generating an intermediate frequency signal, the oscillator circuit includes an oscillator, a programmable frequency divider which frequency-divides the oscillation signal in accordance with frequency division information, a phase comparator ... 01/05/06 - 20060003727 - Rf front-end receiver An RF front-end receiver comprises a low noise amplifier and a local oscillator driver, which are connected to respective input ports of a mixer which comprises a first and second transistor with gates coupled to one output terminal, a third and fourth transistor with gates coupled to the other output ... 01/05/06 - 20060003726 - Automatic gain control using signal and interference power to obtain extended blocking performance In a radio including analog and digital portions, with at least one A/D converter between the analog and digital portions, and the selectivity of the radio at least partly implemented in the digital domain, an AGC controller sets a first variable gain amplifier (VGA) (302) to low gain upon a ... 12/08/05 - 20050272396 - Angle demodulation apparatus, local oscillation apparatus, angle demodulation method, local oscillation signal generating method, recording medium and computer data signal An FM modulation signal is mixed with a pair of first local oscillation signals to be converted to a pair of base band signals. The base band signals are respectively mixed a pair of second local oscillation signals. The resultant signals are added together, thereby yielding an IF signal which ... 12/01/05 - 20050266822 - Frequency conversion circuit, modulation circuit, polar modulation transmitting circuit, quadrature modulation transmitting circuit, communication instrument, and frequency conversion method A frequency conversion circuit is provided capable of suppressing noise converted from about a frequency twice as large as a local signal to a reception band frequency, which performs modulation by mixing an input signal with a local signal. The frequency conversion circuit includes a first transistor whose base is ... 12/01/05 - 20050266821 - Low distortion quadrature mixer and method therefor A mixer (114) includes an input amplifier (620) and a barrel shifter (640). The input amplifier (620) has an input for receiving an input signal, and first through fourth output terminals respectively providing first through fourth current signals. The barrel shifter (640) has first through fourth input terminals for respectively ... 11/17/05 - 20050255822 - Low-loss frequency pattern generator Frequency pattern generator (1, 101, 201) for generating frequency pulses, said generator having a first local oscillator unit (2-1, 121, 221) for generating a first radio frequency carrier frequency signal (LO1), at least one second local oscillator unit (2-2, . . . 2-N, 122, 222) for generating at least one ... 11/17/05 - 20050255821 - Ism band to u-nii band frequency transverter and method of frequency transversion A frequency transverter (10) and method for enabling bi-frequency dual-directional transfer of digitally encoded data on an RF carrier by translating between a crowded or otherwise undesirable first frequency band, such as the 2.4 GHz ISM band, and a less-crowded or otherwise desirable second frequency band, such as the 5.0 ... 10/20/05 - 20050233723 - Rf mixer with high local oscillator linearity using multiple local oscillator phases An RF mixer includes a plurality of submixers coupled to a single input transistor pair and a single tail current source. An input LO signal is divided into multiple individual waveforms, each having a different phase. The phase differences are even in that the phase difference between any two time-adjacent ... 10/06/05 - 20050221785 - Spread-spectrum signal generator A spread-spectrum signal generator includes four differential input signal terminals, a differential output signal terminal, four interconnected mixer control subcircuits, a 4-input differential mixer, a first current source having a magnitude which sets the mixer's 3 db bandwidth, and a second current source having a magnitude which controls a frequency ... 09/29/05 - 20050215224 - Multi-carrier receiving method and apparatus An FFT unit subjects a baseband signal to FFT operation. An IQ-to-phase conversion unit converts an in-phase component value and a quadrature component value of each of a plurality of signals on respective subcarriers subjected to FFT into a phase component value. A phase equalization unit generates a plurality of ... 09/08/05 - 20050197092 - Analog peak detection circuitry for radio receivers A receiver portion of a radio includes an analog circuit for determining a peak amplitude in a way that eliminates or reduces the effects of frequency errors that are introduced by crystals within filters and other devices. A voltage follower and a current mirror in which a MOSFET coupled to ... 08/04/05 - 20050170807 - Method for frequency conversion and receiver A method and device for frequency conversion is disclosed in which a first signal with a first frequency is converted into a second frequency through mixing with a divided oscillator signal and wherein the frequency of the divided oscillator signal stands in a fractional rational ratio to the frequency of ... 08/04/05 - 20050170806 - Mixer circuit for direct conversion transceiver with improved ip2 A mixer for direct conversion transmitters and receivers using four phase-shifted local oscillation signals that are orthogonal each other to control a plurality of switches for outputting signals that are orthogonal each other. Two output signals that are orthogonal to each other do not mutually interfere and have a predetermined ... 07/28/05 - 20050164670 - Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology A communication system comprising a multi-protocol, multi-bearer sub-system is described herein. The sub-system is a universal platform module that can transmit and receive one or more information signals in one or more protocols using one or more bearer services. In one embodiment, the sub-system may form a portion of a ... 06/09/05 - 20050124311 - Low-voltage low-power high-linearity active cmos mixer A low voltage, low power, high linearity active CMOS mixer for radio frequency (RF) wireless communication applications consists of high linearity RF transconductor to convert the incoming RF voltage into a RF current; an ac-coupling stage to deliver the RF current to the next stage, and to block the DC ... 06/02/05 - 20050118977 - Method, apparatus, and systems for digital radio communication systems A radio system includes a radio frequency (RF) integrated circuit (IC) and a baseband digital signal processing (DSP) IC. A serial digital interface couples data between the RF IC and the DSP IC to provide a high data rate and low noise. In one embodiment, the RF IC has a ... ### FreshPatents.com Support - Terms & Conditions |