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| Number | Title | Issue Date |
| 8180311 | 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 includ... | 05/15/2012 |
| 8165557 | Frequency down-conversion system using arrays of coupled non-linear elements A system includes at least a first array connected to a second array. The first array includes an odd number, greater than one, of unidirectionally-coupled non-linear first array elements. The second array includes an odd number, greater than one, of unidirectionall... | 04/24/2012 |
| 8160534 | Applications of universal frequency translation Frequency translation and applications of same are described herein. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and filtering, and combinations and applica... | 04/17/2012 |
| 8145177 | Receiving apparatus A receiving apparatus includes: a frequency conversion portion that has at least a mixer that down-converts a frequency of a reception radio-frequency signal by mixing the radio-frequency signal and an output from a voltage-controlled oscillator and outputs the down... | 03/27/2012 |
| 8135374 | Frequency converting circuit and receiver A frequency converting circuit that outputs an output signal obtained by mixing a first input signal and a second input signal, has: a first input terminal to which the first input signal is input; a second input terminal to which the second input signal is input; a... | 03/13/2012 |
| 8086207 | Linear transconductor for RF communications The present patent application comprises a linear transconductor having at least one input and at least one output, comprising a differential amplifier having a plurality of transistors and a plurality of inputs, wherein a difference of input signals is amplified, a... | 12/27/2011 |
| 8086208 | Passive wireless receiver A passive wireless receiver to receive an input signal and passively process the input signal to generate an output signal. An embodiment of the receiver includes an input circuit, a dynamic switching circuit, and a switch signal generator. The input circuit is conf... | 12/27/2011 |
| 8078133 | Reduction of gain switching induced phase jumps in high dynamic range downcoversion mixers A system and method for minimizing phase jumps in an output signal. ... | 12/13/2011 |
| 8050648 | Superconducting digital mixer Digital mixers which permit mixing of asynchronous signals may be constructed of Rapid Single Flux Quantum (RSFQ) logic elements. The logic elements may include an RSFQ non-destructive readout cell (NDRO), an RSFQ D flip-flop, an RSFQ XOR circuit, and an RSFQ T flip... | 11/01/2011 |
| 8036626 | Method and system for a distributed transceiver with DDFS channel selection Aspects of a method and system for a distributed transceiver with DDFS channel selection may include frequency-translating a first signal to generate one or more second signals utilizing a distributed mixer and an in-phase and quadrature mixing stage. The first sign... | 10/11/2011 |
| 8036625 | Method and apparatus for mixing a signal In a method for mixing an information signal, a digital information signal at a sampling frequency fs is generated. A mixed signal is generated as a multiplication of the digital information signal with a mixing signal at the sampling frequency fs | 10/11/2011 |
| 8036627 | Bidirectional frequency mixer, radiofrequency transceiver system including such a mixer The present invention relates to a bidirectional frequency mixer, as well as a radiofrequency transceiver system including at least such a mixer. The mixer includes two ports separated in intermediate frequency FI, one for the reception, the other for the emission a... | 10/11/2011 |
| 8032105 | Multistage frequency conversion A receiver for frequency down converting a radio frequency signal (10) using a multistage frequency (down) conversion. The radio frequency signal (10) having a center frequency that is comprised in one of at least two frequency bands, comprises oscilla... | 10/04/2011 |
| 8027657 | 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 significantly increases power consumption and integrated circuit are... | 09/27/2011 |
| 8019315 | Mixer and frequency converting apparatus A mixer includes a magnetoresistive effect element, a magnetic field applying unit, and an impedance circuit. The magnetoresistive effect element includes a fixed magnetic layer, a free magnetic layer, and a nonmagnetic spacer layer disposed between the fixed magnet... | 09/13/2011 |
| 8019314 | Radio communication apparatus A radio communication apparatus using a direct conversion method capable of receiving a radio signal having a predetermined frequency band. The radio communication apparatus includes: a low-noise amplifier section including one or a plurality of low-noise amplifiers... | 09/13/2011 |
| 8010076 | Method and system for correcting receiver mixer IQ mismatch A system for correcting an IQ mismatch in a receiver mixer is disclosed and may include one or more circuits that generate an IQ correlation with a training signal having periodic, uncorrelated I and Q signals. The one or more circuits may estimate a gain mismatch b... | 08/30/2011 |
| 8000676 | Second intercept point (IP2) calibrator and method for calibrating IP2 A second intercept point (IP2) calibrator and a method for calibrating IP2 are disclosed. The IP2 calibrator and the method for calibrating IP2 remove any direct current (DC) offset by comparing a common-mode reference voltage with the common-mode voltage measured b... | 08/16/2011 |
| 7995983 | Gilbert mixers with improved isolation The employment of cascading 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 57-6... | 08/09/2011 |
| 7991376 | Mixer used for direct conversion receiver Provided is a mixer including a mixing unit configured to mix high frequency data signals and local oscillation (LO) signals, generate first and second low frequency data signals, and output the first and second low frequency data signals to first and second output ... | 08/02/2011 |
| 7991377 | Mixer and frequency converting apparatus A mixer includes: a magnetoresistive effect element including a fixed magnetic layer, a free magnetic layer, and a nonmagnetic spacer layer disposed between the fixed magnetic layer and the free magnetic layer; and a magnetic field applying unit that applies a magne... | 08/02/2011 |
| 7983648 | Low intermediate frequency receiver and the same method thereof The present invention provides a low intermediate frequency receiver for receiving radio frequency signal and provides the sampling method thereof. The low intermediate frequency receiver firstly samples the radio frequency signal so as to convert it into digital si... | 07/19/2011 |
| 7962114 | Drain-pumped sub-harmonic mixer for millimeter wave applications A sub-harmonic mixer includes a first transistor having a source and a drain and a second transistor having a source connected to the source of the first transistor and a drain connected to the drain of the first transistor. A mixing transistor is configured to be b... | 06/14/2011 |
| 7957716 | Baseband filters for use in wireless communication devices An embodiment of a baseband filter in a transmitter subsystem of a wireless device comprises an operational amplifier (op-amp), a pole circuit, a feedback capacitor, and an active device. The op-amp is adapted to produce an amplified signal that includes noise gain ... | 06/07/2011 |
| 7949324 | Method for compensating transmission carrier leakage and transceiving circuit embodying the same The application discloses embodiments of methods and/or systems for compensating a transmission carrier leakage of an up-conversion mixer, a tranceiving circuit or apparatus embodying the same. One embodiment of a method can include detecting an I channel DC offset ... | 05/24/2011 |
| 7933576 | Sub-harmonic mixer A sub-harmonic mixer is provided, which includes: a mixer core having first and second transistors performing switching operations in response to a local oscillator (LO) signal and a radio frequency (RF) signal; a power source applying bias maximizing nonlinearity o... | 04/26/2011 |
| 7907927 | Merged high pass filtering and down-converting mixer circuit According to one exemplary embodiment, a mixer circuit comprises first and second switching branches driven by a local oscillator and an input radio frequency (RF) signal. The mixer circuit further comprises at least one capacitor coupled between the first and secon... | 03/15/2011 |
| 7890076 | Mixer circuit and method A method of providing an input signal to a mixer circuit comprises coupling an output signal from a low-noise amplifier circuit to a mixer input of the mixer circuit via an AC coupling circuit, comprising an inductive of capacitive coupling circuit. For capacitive c... | 02/15/2011 |
| 7890077 | Balanced mixer with calibration of load impedances A calibration device is coupled to a balanced circuit device including first and second outputs provided with first and second load impedances. The calibration device includes an adjusting circuit to adjust the first and second load impedances into a load imbalance ... | 02/15/2011 |
| 7890078 | Dual band WLAN communication frequency synthesizer technique A dual band WLAN (Wireless Local Area Network) communications technique is provided where a frequency synthesizer unit generates an LO (Local Oscillator) signal at a frequency between both frequency bands and two downconversion units and/or two upconversion units ar... | 02/15/2011 |
| 7877076 | Error calculation circuit for mixer An error calculation circuit used for compensating a carrier leak at an output signal of a mixer has a sign extraction unit for extracting the sign of a baseband signal which is applied to the mixer, an envelope detecting unit for performing envelope detection on th... | 01/25/2011 |
| 7865164 | Apparatus and methods for downconverting radio frequency signals A noise isolation passive mixing apparatus is designed to mitigate noise contribution from intermediate frequency (IF) filters and amplifiers in a radio frequency translation stage. Common-gate configuration devices are inserted between passive mixer output and inpu... | 01/04/2011 |
| 7860480 | Method and apparatus for controlling a harmonic rejection mixer In one embodiment, the present invention includes a method for receiving a radio frequency (RF) signal and mixing the RF signal with a master clock to obtain a mixed signal, cyclically rotating the mixed signal to each of N gain stages for at least one cycle of the ... | 12/28/2010 |
| 7856221 | Mixer topologies having improved second order intermodulation suppression Mixer topologies that have sufficiently high IIP2 and sufficiently low quadrature error to make zero IF receivers possible without special calibration techniques. This simplifies the receiver, avoids circuit startup delay and provides more stable performance over ti... | 12/21/2010 |
| 7853233 | Zero if down converter with even order harmonic suppression An embodiment is directed to a zero IF down converter circuit. The circuit comprises a voltage-to-current converter, a mixer, and a suppression circuit. The voltage-to-current converter converts an RF voltage signal to an RF current signal. The mixer changes the fre... | 12/14/2010 |
| 7848728 | Broadband balanced frequency converter A broadband balanced frequency converter (“BBFC”) in signal communication with a frequency source is disclosed. The BBFC may include a mixer and an active balancing element in signal communication with the mixer. ... | 12/07/2010 |
| 7844241 | High linearity frequency conversion system and method A frequency converter (100) is provided, comprising: a pulse generator (150) configured to receive a balanced local oscillator signal pair and to generate a balanced rectangular pulse signal pair having the reference frequency; and a mixer (160)... | 11/30/2010 |
| 7835715 | Log-antilog mixer circuit and method for producing frequency conversion According to one exemplary embodiment, a method for producing frequency conversion of a communication signal comprises performing a logarithmic transformation of the communication signal to form a logarithmically transformed communication signal, adding the logarith... | 11/16/2010 |
| 7831234 | Mixer arrangement, use of the mixer arrangement and method for frequency conversion A mixer arrangement includes a mixer cell coupled by a signal input to a mixer input, and is embodied for frequency conversion of a signal present on the input side to an intermediate frequency. A first current source is coupled to the signal input of the mixer cell... | 11/09/2010 |
| 7826817 | Applications of universal frequency translation Frequency translation and applications of same are described herein. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and filtering, and combinations and applica... | 11/02/2010 |
