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| Number | Title | Issue Date |
| 7826816 | Systems, methods, and apparatus for frequency conversion A method according to one embodiment includes using a quadrature set of local oscillator signals having duty cycles of substantially less than fifty percent to perform a mixing operation on a radio-frequency current signal. Other embodiments include using a quadratu... | 11/02/2010 |
| 7764940 | System and method for discovering frequency related spurs in a multi-conversion tuner The present invention is directed to a system and method of reducing frequency interference in a circuit when the harmonics of at least two frequencies could cause interference when such harmonics interact with each other. In one embodiment, a determination is made ... | 07/27/2010 |
| 7738851 | Harmonic rejection mixer A technique includes providing a plurality of local oscillator signals such that each of the local oscillator signals has a different phase. The technique includes providing scaling units to scale the input signal pursuant to different scaling factors to generate sc... | 06/15/2010 |
| 7610033 | Radio frequency tuner A radio frequency tuner is provided having inputs for receiving signals in common or overlapping frequency ranges from distribution networks. Each input is connected to a respective first converter, for example performing upconversion to a first intermediate frequen... | 10/27/2009 |
| 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. The mixer also comprises an integrator coupled to receive the output ... | 02/10/2009 |
| 7421259 | 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 phas... | 09/02/2008 |
| 7403751 | DC offset calibration system A division ratio of a first frequency divider that generates a local signal and a division ratio of a second frequency divider that generates a RF interfering signal are different, and a first frequency synthesizer that generates the local signal and a second freque... | 07/22/2008 |
| 7398073 | Low noise mixer A low noise mixer comprises a first mixer core configured to receive a radio frequency (RF) input signal having an RF frequency, and a first local oscillator signal, wherein the first local oscillator signal is at a frequency that is nominally twice the frequency of... | 07/08/2008 |
| 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 applied to a quadrature mixer. The coupler is implemented entirely on-chi... | 06/10/2008 |
| 7366486 | System and method for coarse/fine PLL adjustment An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 04/29/2008 |
| 7366485 | Multimode wireless transmitter and a portable wireless device using the same The circuits of a multimode wireless transmitter are complex and large, and thus difficult to incorporate in a portable wireless device. This problem is solved for a multimode wireless transmitter by enabling the first frequency mode circuit and the second frequency... | 04/29/2008 |
| 7340230 | Receiver architectures utilizing coarse analog tuning and associated methods Receiver architectures and associated methods are disclosed that provide initial analog coarse tuning of desired channels within a received signal spectrum, such as a set-top box signal spectrum for satellite communications. These architectures provide significant a... | 03/04/2008 |
| 7333467 | Receiver circuit and method using selectively variable amplification for receiving time signals from different transmitters A time signal carrying encoded time information transmitted at a transmission frequency from any one of plural time signal transmitters is received, amplified, and evaluated to acquire the time information. The transmission frequency of the received time signal is d... | 02/19/2008 |
| 7333831 | Interchangeable receive inputs for band and system swappability in communication systems and related methods Interchangeable high band low-noise-amplifiers (LNAs) and low band low-noise-amplifiers (LNAs) and related methods are disclosed that greatly enhance the efficiency of designing handsets for different combinations of frequency bands. The input signals to particular ... | 02/19/2008 |
| 7330707 | Hetrodyne receiver and IC In a heterodyne receiver, the effect of an image interference signal that occurs in a case where a low intermediate frequency is used is alleviated. Circuits (12I), (12Q), (13I), (13Q), and (14) are provided to switch a heterodyne ... | 02/12/2008 |
| 7324797 | Bragg-cell application to high probability of intercept receiver A unique ultra wide band receiver is provided that blends together RF and photonic technologies. The receiver has application as a steering mechanism (600) for a much higher resolution receiver. Some implementations can provide at least four times shorter sca... | 01/29/2008 |
| 7279911 | Probe card assembly with dielectric structure A probe card assembly for providing electrical interconnection between a semiconductor device to be tested and a test system is provided. The probe card assembly includes a plurality of probes supported by a support substrate, each of the plurality of probes includi... | 10/09/2007 |
| 7277683 | Regenerative divider for up and down conversion of radio frequency (RF) signals The present invention relates generally to communications, and more specifically to a method and apparatus for generating local oscillator signals used for up- and down-conversion of RF (radio frequency) signals. A major problem in the design of modulators and demod... | 10/02/2007 |
| 7272374 | Dynamic selection of local oscillator signal injection for image rejection in integrated receivers A system and method are disclosed for dynamically selecting high-side injection or low-side injection of local oscillator mixing signals based upon an assessment of signal power within the input signal spectrum that could cause unwanted images in the processed signa... | 09/18/2007 |
| 7272373 | Ratiometric clock systems for integrated receivers and associated methods A ratiometric clock system for an integrated receiver and associated method are disclosed that provide an advantageous solution for combining digital signal processing (DSP) circuitry on the same integrated circuit as mixer and local oscillator (LO) generation circu... | 09/18/2007 |
| 7268640 | Frequency generator arrangement A frequency generator is provided. The generator comprises two voltage controlled oscillators generating a first signal of a given multiple of a predetermined raster frequency, and a second signal of another given multiple of a predetermined raster frequency, divide... | 09/11/2007 |
| 7269401 | Signal processing circuit for tuner which applies signal processing based on variation in frequency of intermediate frequency signal A signal processing circuit for a tuner has a detector band pass filter for extracting a carrier of an intermediate frequency signal, a frequency counter for counting, based on a clock signal, a frequency of a carrier of the intermediate frequency signal which passe... | 09/11/2007 |
| 7266352 | Multiple band RF transmitters and receivers having independently variable RF and IF local oscillators and independent high-side and low-side RF local oscillators Multistage RF transmitter and receiver circuits may use independently variable RF and IF local oscillators, allowing the RF and IF local oscillator frequencies for a given RF channel to be selected to have a large common factor with respect to the reference oscillat... | 09/04/2007 |
| 7245872 | Satellite broadcasting converter, control circuit incorporated therein, and detector circuit used in such control circuit In a broadcasting satellite converter adapted to be connected to a BS tuner and fed with a power supply voltage signal from the broadcasting satellite tuner, a receiver circuit is controlled by a control circuit. The broadcasting satellite converter comprises a rece... | 07/17/2007 |
| 7242730 | Mirror suppression circuit and receiver using such circuit A mirror suppression circuit includes a first quadrature signal path coupled between quadrature signal input and output terminals and an error correction circuit for correction of amplitude and phase errors in a carrier modulated quadrature signal. To obtain a suppr... | 07/10/2007 |
| 7236212 | System and method for providing a low power receiver design An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 06/26/2007 |
| 7228119 | Apparatus and method for a radio frequency (RF) receiver front end pre-selector tuning for improving the reduction in intermodulation distortion (IMD) A system and method of improving the rejection of intermodulation (IM) distortion in receivers (100) employing varactor tuning preselecters by exploiting the attenuating properties of a tunable preselecter at specific voltages. The invention takes advantage o... | 06/05/2007 |
| 7221300 | Digital-to-analog converter data rate reduction by interleaving and recombination through mixer switching A system and method implement very high data rate baseband DACs suitable for wireless applications related to new standards (e.g. Ultra-Wide Band) using CMOS processes allowing an integrated solution with the deep-submicron CMOS digital baseband. A single CMOS block... | 05/22/2007 |
| 7212798 | Adaptive AGC in a wireless network receiver An apparatus, a carrier medium storing instructions to implement a method, and a method for controlling the gain of a radio receiver for receiving packets of information in a wireless network. The receiver is connected to an antenna subsystem and has receive signal ... | 05/01/2007 |
| 7212141 | Filter with gain Embodiments of a filter with gain are presented herein. ... | 05/01/2007 |
| 7199664 | Integrated switchless programmable attenuator and low noise amplifier An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 04/03/2007 |
| 7190943 | System and method for frequency translation with harmonic suppression using mixer stages A circuit for frequency translating a radio frequency signal comprises a plurality of mixer stages, each stage associated with a particular range of frequencies of a radio frequency signal. The circuit further comprises a switching circuit that communicates the radi... | 03/13/2007 |
| 7187733 | High-frequency signal receiver A high-frequency signal receiver includes a variable gain amplifier for amplifying a high frequency signal input thereto, a local oscillator, a mixer for mixing a signal output from the variable gain amplifier and a signal output from the local oscillator, a filter ... | 03/06/2007 |
| 7177618 | Low noise block down converter with a plurality of local oscillators A low noise block down converter accommodates two local oscillators within one shielding chamber in a metal shielding box and has a conductive bar provided between two dielectric resonators included in the local oscillators respectively. The conductive bar prevents ... | 02/13/2007 |
| 7167694 | Integrated multi-tuner satellite receiver architecture and associated method Multi-tuner receiver architectures and associated methods are disclosed that provide initial analog coarse tuning of desired channels within a received signal spectrum, such as transponder channels within a set-top box signal spectrum for satellite communications. T... | 01/23/2007 |
| 7164896 | Method for driving a receiver stage and respective apparatus Whenever the oscillator frequency is a fraction or a multiple of the received frequency, another received frequency could in turn be there, which would then work as a kind of received disturbance frequency, and thus oscillator pulling occurs, which then severely imp... | 01/16/2007 |
| 7155194 | 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 s... | 12/26/2006 |
| 7155189 | AM receiver An AM receiver with at least one IF filter with a fixed IF bandwidth comprises at least one downconversion stage (3, 4, 5) to shift the signal input thereto into an IF range (IF1) having a variable oscillation frequency (fLO1) which is adjus... | 12/26/2006 |
| 7139545 | Ultra-wideband fully synthesized high-resolution receiver and method An ultra-wideband receiver system includes an intelligent-preselector stage to up-convert received signals to signals within a first IF frequency-range with stepped first oscillation signals, a first down-converting stage to down-convert the signals within the first... | 11/21/2006 |
| 7136618 | Satellite broadcast receiving converter with lower power consumption A control portion detects the presence or absence of a pulse signal provided from a satellite broadcast receiver through a port PO to output a control signal PDOUT. In accordance with control signal PDOUT, a power supply circuit stops a supply of one of a power supp... | 11/14/2006 |
