| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 455314000 | Plural separate successive conversions | 12 |
| 20080318543 | BASEBAND SIGNAL PROCESSING METHOD, BASEBAND SIGNAL PROCESSING CIRCUIT, AND RECEIVER - A baseband signal processing method includes reducing a frequency of an intermediate-frequency signal using a first oscillation signal, the intermediate-frequency signal being a signal that has been converted by an RF circuit that converts a received signal into the intermediate-frequency signal using a local oscillation signal, mixing the reduced signal with a second oscillation signal to obtain a baseband signal, and changing the first oscillation signal and the second oscillation signal corresponding to an oscillation frequency of the local oscillation signal. | 12-25-2008 |
| 20090081983 | METHOD AND SYSTEM FOR A DISTRIBUTED QUADRATURE TRANSCEIVER FOR HIGH FREQUENCY APPLICATIONS - Aspects of a method and system for a distributed quadrature transceiver for high frequency applications may include frequency-translating a first signal to generate a second signal utilizing a plurality of conversion stages. The frequency-translating may comprise receiving in each one of the plurality of conversion stages, a local oscillator signal or a fractional local oscillator signal which may be utilized for mixing a corresponding input signal to each one of the plurality of conversion stages, wherein the first signal may be the corresponding input signal to an initial stage of the plurality of conversion stages. An output signal from a prior one of the plurality of conversion stages may be the corresponding input signal to a successive one of the plurality of conversion stages, and the second signal may be an output signal of a final stage of the plurality of conversion stages. | 03-26-2009 |
| 20090088120 | I/Q Calibration Techniques - A receiver includes a static I/Q calibration block and a correlation/integration block. The static I/Q calibration block is configured to substantially eliminate mismatches between in-phase and quadrature components of a portion of the spectrum having associated I/Q mismatches that are relatively frequency-independent. The correlation/integration block is configured to substantially eliminate mismatches between the in-phase and quadrature components of portions of the spectrum having associated I/Q mismatches that are relatively frequency-dependent in accordance with a pair of signals generated by the static I/C calibration block. | 04-02-2009 |
| 20090111418 | RADIO FREQUENCY FILTERING TECHNIQUE WITH AUTO CALIBRATED STOP-BAND REJECTION - Methods, systems, and apparatuses for filtering received radio frequency signals are provided. A first RF communication signal is received that includes a desired information signal portion and an undesired blocker signal portion that is offset in frequency from the desired portion. The first RF communication signal is amplified in a first signal path and is filtered in a second signal path. The filtering of the first RF communication signal in the second signal path includes: down-converting the first RF communication signal to a down-converted signal, high pass filtering the down-converted signal, and up-converting the high pass filtered down-converted signal to a second RF communication signal. The filtering of the first RF communication signal filters out the desired information signal portion from the second signal path. A signal phase is adjusted in the second signal path to match phase shifts between the first and second signal paths. The second RF communication signal is subtracted from the amplified first RF communication signal to generate a third RF communication signal. Third RF communication signal includes the desired information signal portion but does not include the blocker signal, which is canceled during the subtraction. | 04-30-2009 |
| 20100003943 | 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 of mixers coupled to an input signal. A plurality of phases of a local oscillator signal can be generated from a single local oscillator output. Each of the phases can be used to drive an input of one of the mixers. The mixer outputs can be combined to generate a frequency converted output that has harmonic rejection. | 01-07-2010 |
| 20100233986 | RECEIVER - A receiver includes a high-frequency filter which extracts, from a radio signal, a high-frequency signal, a first frequency converter which performs frequency conversion on the high-frequency signal using a first local signal, to obtain a first baseband signal, a second frequency converter which performs frequency conversion on the high-frequency signal using a second local signal, to obtain a second baseband signal, the second local signal having a frequency equal to an integral multiple of a frequency of the first local signal, and a subtraction processing unit configured to multiply the second baseband signal by a control coefficient for amplitude adjustment to obtain a product signal, and subtract the product signal from the first baseband signal to obtain a residual signal. | 09-16-2010 |
| 20120302192 | 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 of mixers coupled to an input signal. A plurality of phases of a local oscillator signal can be generated from a single local oscillator output. Each of the phases can be used to drive an input of one of the mixers. The mixer outputs can be combined to generate a frequency converted output that has harmonic rejection. | 11-29-2012 |
| 20120302193 | 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 of mixers coupled to an input signal. A plurality of phases of a local oscillator signal can be generated from a single local oscillator output. Each of the phases can be used to drive an input of one of the mixers. The mixer outputs can be combined to generate a frequency converted output that has harmonic rejection. | 11-29-2012 |
| 20140256279 | Partitioned radio-frequency apparatus and associated methods - Radio-frequency (RF) apparatus includes receiver analog circuitry that receives an RF signal and provides at least one digital signal to receiver digital circuitry that functions in cooperation with the receiver analog circuitry. The receiver analog circuitry and the receiver digital circuitry are partitioned so that interference effects between the receiver analog circuitry and the receiver digital circuitry tend to be reduced. | 09-11-2014 |
| 455315000 | With plural separate local oscillators | 3 |
| 20150072637 | Frequency Resolver - A frequency resolver and a method for using the resolver. The resolver includes an oscillator circuit, a mixer circuit, and a controller circuit. The oscillator circuit is configured to provide at least two oscillated signals. The mixer circuit is coupled to the oscillator circuit and includes a first frequency mixer and a second frequency mixer for mixing an incoming RF transmission with the two oscillated signals. The mixer circuit further is configured to provide a first output signal from the first mixer and a second output signal from the second mixer. The controller circuit is coupled to the mixer circuit and configured to determine whether at least one of the first or second output signals are associated with an upper sideband (USB) frequency or a lower sideband (LSB) frequency of the RF transmission. | 03-12-2015 |
| 20160181982 | DOUBLE DOWN-CONVERSION WITH MULTIPLE INDEPENDENT INTERMEDIATE FREQUENCIES FOR E-BAND APPLICATIONS | 06-23-2016 |
| 455316000 | With frequency stabilization for at least one local oscillator | 1 |
| 20160036385 | FREQUENCY DOWN-CONVERSION - Apparatus and methods concern down-converting a radio frequency (RF) signal. As an example, one apparatus includes a first mixer and a second mixer. The first mixer down-converts an RF signal to produce a first intermediate frequency (IF) signal. The second mixer down-converts the first IF signal to produce a second IF signal having a plurality of phase components. The down-converter also includes a plurality of summing circuits. Each of the summing circuits is configured to combine various ones of the phase components of the second IF signal to produce a respective phase component of a third IF signal. The number of phase components in the third IF signal is different from the number of phase components in the second IF signal. | 02-04-2016 |
