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7616938 |
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...
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7616937 |
Subharmonic mixer capable of reducing noise and enhancing gain and linearlty
A subharmonic mixer, including an amplification unit for amplifying an input signal using at least one pair of amplification devices connected in parallel and a mixing unit for mixing the amplified...
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7616063 |
Frequency synthesizer using a phase-locked loop and single side band mixer
A frequency synthesizer is built using a phase locked loop incorporating a single side band mixer either in the feedback loop or in the input. The single side band mixer is preferably realized with...
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7613434 |
Multiplexer and wireless receiver
A multiplexer includes: a first band-pass filter for a first channel, which is formed in a microstrip line on a dielectric substrate and has a first branching characteristic having a center...
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7609776 |
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...
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7606549 |
Selective channel tuner and tuning method
A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator...
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7606546 |
Variable frequency clock generator for synchronizing data rates between clock domains in radio frequency wireless communication systems
A system, method and system are disclosed for using a variable frequency clock generator to synchronize an average data rate over intervals of time in a variable clock domain to make it equal to a...
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7606332 |
Variable signal delaying circuit, quadrature frequency converter and radio frequency tuner
A variable signal delaying circuit comprising an analog delay line having a control input for controlling the variable delay. A phase detector compares the input and output signals of the delaying...
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7603099 |
Direct-conversion receiver system and method with quadrature balancing and DC offset removal
A system and method are provided for direct-conversion of a modulated radio-frequency (RF) signal. After receiving an RF signal, the RF signal is mixed with a plurality of oscillator signals with...
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7603089 |
Methods and apparatus for conditioning low-magnitude events in communications signals
Methods and apparatus for conditioning low-magnitude events in electrical signals. According to an exemplary method, a low-magnitude event occurring in a signal trajectory of a received electrical...
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7599678 |
Processor for a passive ranger
A receiver includes an RF bridge and a processor coupled to the RF bridge to receive an information signal from the RF bridge. The processor includes a clock source and a processor front end. The...
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7596363 |
Method and system for measuring receiver mixer IQ mismatch
Aspects for measuring receiver mixer IQ mismatch in a transceiver are described. The measuring includes providing a training signal for a receiver mixer, the training signal having periodic,...
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7587224 |
Reconfigurable topology for receiver front ends
The method and apparatus of the present invention provide for a configurable radio front end topology that allows selectable operation in a single balanced mode and in a double balanced mode of...
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7587192 |
Balanced mixer with calibration of load impedances
A calibration device (CC) is coupled to a balanced circuit device (MC) comprising first and second outputs respectively provided with first (Z 1 ) and second (Z 2 ) load impedance means. This...
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7587187 |
Ultra wide band, differential input/output, high frequency active mixer in an integrated circuit
A wideband mixer includes a core mixer having input terminals and output terminals for, respectively, receiving differential input signals and providing amplified differential output signals. A...
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7587010 |
Complex filter circuit and receiver circuit
A pseudo-image signal producing section produces a pseudo-image signal imitating an actual image signal. An amplitude detection section detects the amplitude of the pseudo-image signal having...
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7583947 |
Method and system for single sideband mixing receiver architecture for improving signal quality
Certain embodiments of the invention may be found in a method and system for single sideband mixing receiver architecture for improving signal quality in an RF communication system. An embodiment...
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7580693 |
Passive reflection mixer
In one aspect, a mixer that provides improved isolation between an input oscillator and a mixing cell. In another aspect, a mixer that includes circuitry operative to shape an input signal provided...
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7580684 |
Programmable radio transceiver
A fully integrated, programmable mixed-signal radio transceiver comprising a radio frequency integrated circuit (RFIC) which is frequency and protocol agnostic with digital inputs and outputs, the...
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7577418 |
Sub-harmonic mixer and down converter with the same
A sub-harmonic mixer and a down converter with the sub-harmonic mixer are provided. The sub-harmonic mixer includes a differential amplifying unit, a current buffer unit, and a switching unit. The...
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7574190 |
Signal-processing electronics
The present invention relates to a method and an electronic circuit for processing at least two at least partially correlated output signal streams of a mixer, the mixer having at least two signal...
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7558556 |
Adaptive radio transceiver with subsampling mixers
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a...
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7558351 |
Super harmonic filter and method of filtering frequency components from a signal
A harmonic filter for filtering a plurality of frequency components from an input signal comprises a phase shifter for generating an in-phase signal and a quadrature-phase signal according to the...
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7557647 |
Heterodyne receiver using resonant structures
An electronic receiver for decoding data encoded into electromagnetic radiation (e.g., light) is described. The light is received at an ultra-small resonant structure. The resonant structure...
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7555263 |
Adaptive radio transceiver
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a...
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7551910 |
Translation and filtering techniques for wireless receivers
Various embodiments are disclosed relating to wireless receivers. According to an example embodiment, a method and apparatus are provided. The method may include receiving an input signal within a...
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7548742 |
Tuner for radio frequency receivers and associated method
A tuner architecture is disclosed that mixes an analog RF input signal and a digital local oscillator signal to generate a output signal at a desired IF frequency, including low-IF and zero-IF...
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7548734 |
Multi-band RF receiver
A multi-band receiver is disclosed. The multi-band receiver includes a low-noise amplifier (LNA) and a mixer. The LNA includes a switched receiving circuit, a loading circuit, and a switching...
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7546110 |
Low power highly linear RF downconverter
A technique for downconverting a RF signal comprises an antenna adapted to receive an RF signal; a transconductance amplifier connected to the antenna and adapted to amplify the RF signal; a...
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7546109 |
Gilbert mixers with improved isolation and methods therefor
The employment of cascoding in connection with improving mixer isolation in a Gilbert mixer circuit is provided. In this vein, there is broadly contemplated herein, inter alia, the provision of a...
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7546102 |
Dual band frequency synthesizer
The invention relates to a dual band frequency synthesizer for generating either a first output frequency f high or a second output frequency f low , where f high =2 f low , comprising an...
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7542751 |
Down-converter and calibration method thereof
A mixer and calibration method thereof are provided. A direct conversion receiver comprises a differential loading pair utilizing at least one binary weighted resistor. The binary weighted resistor...
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7542742 |
Down converter with shielding structure
A down converter includes a housing, a down conversion circuit, and a shielding structure. The down conversion circuit is disposed in the housing. The shielding structure is disposed above the down...
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7539474 |
DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal, and applications thereof are described herein. Reducing or eliminating DC offset...
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7536166 |
Monolithically integrated circuit
A monolithically integrated circuit, particularly an integrated circuit for radio frequency power applications, has a transistor ( 11; 51 ), preferably a power LDMOS transistor, and a spiral...
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7529529 |
Low noise, high-linearity RF front end receiver
An architecture for a receiver of a wireless device having a Low Noise Amplifier (LNA) transconductor to receive a signal from an antenna, a mixer meshed with the LNA transconductor, and an...
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7522899 |
Image rejection scheme for receivers
An RF receiver image rejection scheme. The RF is received and mixed in two quadrature channels allowing separation of the undesired image portion within the RF signal from the desired portion. The...
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7519344 |
Bandpass amplifier, method, and system
An amplifier has a band pass response. The band pass response may be set by setting corner frequencies of low pass filters.
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7519100 |
Method and device for transmission/reception with frequency hopping
A method and device for transmitting data in the form of a series of blocks in which each block of data is subjected to a frequency conversion in order to be transmitted at a carrier frequency. The...
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7512394 |
Wideband up-conversion mixer
An up-conversion mixer includes a first and a second hybrid couplers and a first and a second traveling-wave mixers is disclosed. The first hybrid coupler receives an input intermediate frequency...
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7512393 |
Downconverting mixer
A downconverter is provided. The downconverter includes a I mixer and a Q mixer. Each mixer includes a transconductance stage and a mixer core stage. The outputs of the transconductance stages of...
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7512083 |
Single chip multi-antenna wireless data processor
A single chip integrated circuit wireless data processor demodulates N separate data signals from M separate antennas simultaneously. The multi-antenna processor can be coupled to a baseband...
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7509112 |
Wideband image rejection mixer
An image rejection mixer including a first and a second hybrid couplers and a first and a second traveling-wave mixers is disclosed. The first hybrid coupler divides an input radio frequency (RF)...
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7509110 |
High-order harmonic rejection mixer using multiple LO phases
A mixer produces an improved output signal during frequency translation of an input signal using a local oscillator (LO) signal. The mixer includes five component mixers connected in parallel. Each...
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7505750 |
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...
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7499693 |
Mixer for homodyne RF receiver
A mixer of a homodyne RF receiver made from a CMOS process is provided. The mixer comprises a gain stage, a switch stage and a load stage. The gain stage receives a differential-typed RF signal and...
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7496342 |
Down-converting electromagnetic signals, including controlled discharge of capacitors
Methods, systems, and apparatuses, for down-converting and up-converting an electromagnetic signal. In embodiments the invention operates by receiving an EM signal and recursively operating on...
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7493098 |
Semiconductor integrated circuit
In a communication semiconductor integrated circuit, a capacitance included in a filter on the output side of a mixer circuit is reduced without requiring the cutoff frequency of the filter to be...
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7493094 |
Multi-mode power amplifier module for wireless communication devices
A power amplifier can amplify an input radio frequency signal to produce an output radio frequency signal in response to a bias control signal. A programmable digital control unit produces the bias...
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7489916 |
Direct down-conversion mixer architecture
Direct down-conversion mixer. A direct down-conversion mixer is provided. The mixer comprises an LO switching pair coupled to receive an RF input signal and produce a down converted output signal....
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