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7623838 |
Sampling mixer with asynchronous clock and signal domains
A mixer 1100 with a plurality of signal paths typically requires separate clock generating hardware for each signal path. However, the redundancy of having multiple clock generating hardware...
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7620399 |
Method and system for performing handover between multiple modes using a single wireless receiver
A method for performing handover between multiple modes for a mobile station is provided. The method includes operating the mobile station in a first mode. A handover from the first mode to a...
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7606323 |
Carrier leak reduction transmitter circuit
A transmitter circuit has two mixers that modulate a carrier wave according to an input signal, outputs a signal having information in a phase and an amplitude, detects a DC offset in each of the...
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7603094 |
DC offset correction for direct conversion receivers
A direct current (DC) offset correction system for a direct conversion receiver and corresponding receiver and methods facilitate reduction of DC offsets in such receivers. One method includes...
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7602865 |
Apparatus and method for enhancing a reception rate of a receiver
A system and method is disclosed for enhancing a reception rate for a mobile communication system. A system is provided comprising a demodulator for separating a received signal into an I signal...
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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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7593707 |
Method and system for compensation of DC offset in an RF receiver
Aspects of compensating for DC offset in an RF receiver may comprise sampling data from at least one of a plurality of output paths, selecting a sampled data and generating at least one feedback...
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7590400 |
Radio apparatus
In a radio apparatus, the band of a loop filter of a synthesizer in a blank channel searching state is narrower than the band in a communicating state. In addition, a radio wave environment is...
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7580689 |
Transmission method, transmitter, reception method, and receiver
For the purpose of efficient transmission based on the UWB system, first and second baseband waveforms are generated at a cycle equivalent to an integral multiple of a carrier to have a specified...
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7580478 |
I/Q modulator using current-mixing and direct conversion wireless communication transmitter using the same
The present invention relates to an I/Q modulator using a current-mixing method used for a direct conversion wireless communication transmitter. In accordance with the present invention, an EVM of...
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7577419 |
Digital mixer system and method
A digital mixer system and method is disclosed. In an embodiment, a digital mixer can receive a modulated signal having a sample rate approximately equal to a clock rate divided by an integer...
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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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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...
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7567787 |
Apparatus and method of feeding internal calibration signal through electro-static discharge protection circuitry
An apparatus and method for internally calibrating a direct conversion receiver (DCR) through feeding a calibration signal via ESD protection circuitry is disclosed. The apparatus includes an...
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7565120 |
Semiconductor integrated circuit and semiconductor integrated circuit for radio communication
In a signal receiving circuit of a direct conversion system applied with a semiconductor integrated circuit for radio communication having a PLL requiring a clock signal, an LNA requiring low-noise...
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7558550 |
Versatile system for multimode, wireless communication receiver with ZIF and Near-ZIF operations
An architecture for a receiver component in a wireless communications system is disclosed—one that supports both zero intermediate frequency (ZIF) and near-zero intermediate frequency (NZIF)...
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7558537 |
Modified preamble for programmable transmitter
A programmable transmitter generates a frame preamble to train a receiver with respect to a communication link format that corresponds to a transmission mode wherein the transmission mode may...
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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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7555279 |
Systems and methods for DC offset correction in a direct conversion RF receiver
Systems and methods for DC offset correction in analog and digital direct conversion RF receivers. A time derivate and subsequent integration of in-phase and quadrature phase signal path components...
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7529533 |
Configurable homodyne/heterodyne radio receiver and RFID reader employing same
The embodiments of the present invention provide a configurable homodyne/heterodyne RF receiver including first and second mixers. The configurable homodyne/heterodyne RF receiver functions as a...
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7522902 |
Adaptive DC offset compensation apparatus and method thereof
Provided are a direct current (DC) offset compensation apparatus and a method thereof. A DC offset compensation apparatus comprises an offset detection block detecting a DC offset, an offset...
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7522901 |
Direct digital conversion tuner and method for using same
A direct sampling tuner includes a low noise amplifier and an optional dynamically configurable band pass filter coupled to the low noise amplifier. The optional filter is configured to pass a...
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7519349 |
Transceiver development in VHF/UHF/GSM/GPS/bluetooth/cordless telephones
A digital communication circuit can be implemented can be implemented in a CMOS, or other IC structure. The digital circuit can utilize negative frequency removers or image frequency removers in...
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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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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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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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7483684 |
Mixer
To realize a mixer with a charge subsampling circuit with which a base band signal can be readily obtained without being affected by noise from wide bandwidth signals or undesired signals. A...
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7477886 |
Cascading-synchronous mixer and method of operation
A radio frequency (RF) demodulation circuit comprising: 1) a radio frequency (RF) mixer having a first input port capable of receiving an incoming RF signal having a frequency of RF and a second...
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7474885 |
Passive subharmonic mixer
Embodiments feature a circuit that includes a first set of differential switches to generate a first mixer output. The first set includes source terminals, a differential input terminal, gate...
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7469137 |
Radio receiver DC offset cancellation via ADC input bias
A scaled input current is produced that substantially matches the full scale input of a CTΔΣADC that substantially cancels an offset bias current component of the input current. A bias resistance...
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7469136 |
RF receivers and methods therefor
Methods in intermediate frequency and direct conversion receivers for reducing pre-selection filter leakage and harmonic coupling to a programmable voltage controlled oscillator by mixing a receive...
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7466972 |
System and method for optimized receiver performance in a low intermediate frequency architecture for edge
The present disclosure relates generally to systems and methods for optimized receiver performance in a low intermediate frequency (IF) architecture for EDGE (Enhanced Data rates for GSM...
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7463875 |
Wireless device minimizing use of external bandpass filter between low-noise amplifier and first mixer
A receiver system design and architecture that implements a 3-step gain LNA and an analog VGA for a WCDMA handsets and local area base stations, providing a wireless device eliminating the use of...
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7454186 |
Direct conversion receiving apparatus and celluar phone
The direct conversion receiving apparatus has a gain control amplifier for variably amplifying a base band signal based on a gain switching control signal. A high pass filter has a first circuit...
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7450920 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Method and system for compensation of DC offset in an RF receiver
Aspects of compensating for DC offset in an RF receiver may comprise sampling data from at least one of a plurality of output paths, selecting a sampled data and generating at least one feedback...
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7450919 |
I/Q mismatch correction using transmitter leakage and gain modulation
A system and method are provided for compensating for an I/Q mismatch of a receiver in a mobile terminal. In general, the receiver and a transmitter of the mobile terminal are formed on a single...
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7421040 |
Modem tuner
A tuner includes a mixer which receive first and second inputs via a multiplexer in different frequency ranges from different sources such as cable and satellite. A local oscillator supplies...
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7415264 |
Low noise filter for a wireless receiver
A low noise filter is arranged to receive an input signal from a downconverter. The low noise filter is constructed to block or cancel any DC offset in the input signal, as well as filter selected...
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7415260 |
Current-mode direct conversion receiver
A current-mode direct conversion RF receiver is presented. In one set of embodiments the RF receiver comprises a simple transconductor input stage to create a current-mode modulated signal from a...
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7412222 |
Quadrature correction method for analog television reception using direct-conversion tuners
A direct conversion radio frequency (RF) tuner includes a mixer generating I and Q quadrature components. A phase detection circuit generates a phase error measurement between the I quadrature...
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7403760 |
DC offset correction for direct-conversion receiver
A DC offset correction system for a direct-conversion receiver is disclosed that may include a DC feedback correction servo-loop in signal communication with a baseband section, where the DC...
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7398068 |
Dual antenna system having one phase lock loop
A dual receive path for a wireless communication device having one synthesizer that drives one or two receive VCOs.
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7395040 |
Multiple band multiple input multiple output transceiver integrated circuit
A MIMO transceiver integrated circuit (IC) includes a plurality of multiple band direct conversion transmitter sections, a plurality of multiple band direct conversion receiver sections, and a...
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7386291 |
Integrated millimeter-wave quadrature generator
An off-chip signal is provided to a differential branch-line directional coupler implemented entirely on-chip. The coupler produces differential quadrature signals, which are then buffered and...
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7379727 |
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...
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7376440 |
N-plexer systems and methods for use in a wireless communications device
A wireless communication device comprises an N-plexer, that is, a multi-band device, connected to a single antenna for receiving multiple communication bands on the single antenna. The N-plexer...
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7376405 |
Receiver circuit
Interruption of a reception signal is achieved by placing a first low noise amplifier into the sleep state, and short-circuiting a shunt switch provided between differential input terminals of a...
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7376400 |
System and method for digital radio receiver
A communications system comprising a processor, a variable oscillator, a radio frequency (RF) quadrature demodulator, a variable capacitor, a continuous-time, sigma-delta analog-to-digital...
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7373132 |
High frequency signal receiver
A high frequency signal receiver can prevent higher harmonics other than a necessary higher harmonic from being subjected to frequency conversion so as to interfere with the base band signal in a...
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7373114 |
Signal transmission circuit, signal output circuit and termination method of signal transmission circuit
This invention provides a signal transmission circuit, a signal output circuit, and a termination method of a signal transmission circuit capable of preventing the re-reflection of the signal at a...
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