| Patent application number | Description | Published |
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| 20100203848 | FIXED BANDWIDTH LO-GEN - A local oscillation generator (LO-GEN) maintains a fixed bandwidth using a voltage controlled oscillator (VCO) calibration module and gain calibration module that together compensate for variations in the VCO gain based on the oscillation frequency. During an open loop calibration of the LO-GEN, the VCO calibration module programs the VCO gain to an initial coarse value based on the oscillation frequency and then the gain calibration module adjusts the charge pump current to compensate for VCO gain changes. | 08-12-2010 |
| 20100240328 | RF TRANSMITTER FRONT-END AND APPLICATIONS THEREOF - A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active. | 09-23-2010 |
| 20100290562 | Digital Compensation for Nonlinearities in a Polar Transmitter - A polar transmitter includes a digital processor coupled to receive a complex modulated digital signal and a feedback signal produced from the complex modulated digital signal and that is operable to compare the complex modulated digital signal to the feedback signal to determine an error signal indicative of a difference between the complex modulated digital signal and the feedback signal. The digital processor is further operable to produce a correction signal from the error signal and to add the correction signal to the complex modulated digital signal to produce a corrected complex modulated digital signal. | 11-18-2010 |
| 20100310010 | RADIO FREQUENCY INTEGRATED CIRCUIT HAVING FREQUENCY DEPENDENT NOISE MITIGATION WITH SPECTRUM SPREADING - A plurality of baseband clock signals by detecting an interference condition associated with at least one of the plurality of baseband clock signals and by spreading the spectrum of the at least one of the plurality of baseband clock signals when the interference condition is detected. | 12-09-2010 |
| 20110039505 | INTEGRATED MULTIMODE RADIO TRANSMITTER AND COMPONENTS THEREOF - An integrated multi-mode radio transmitter includes a multiplexor and a shared front-end. The is operable to select an IF signal of a plurality of IF signals based upon a selection signal that is indicative of a particular operational mode of the one of the plurality of IF signals. The shared front-end is coupled to receive the selected IF signal, wherein the shared front-end converts the selected IF signal into a radio frequency (RF) signal that is modulated in accordance with the particular operational mode of the one of the plurality of IF stages. | 02-17-2011 |
| 20110057731 | Feedback-Based Linearization of Voltage Controlled Oscillator - Embodiments of the present invention enable a feedback-based VCO linearization technique. Embodiments include a frequency locked loop formed by feeding back a VCO's output into the VCO's input in negative phase by means of a frequency-to-voltage (F/V) converter. Embodiments enable constant VCO gain over a wide input tuning range and across PVT variations. Further, embodiments can be nested within a PLL, for example, with negligible area and power consumption overhead. | 03-10-2011 |
| 20110064004 | RF Front-End With On-Chip Transmitter/Receiver Isolation and Noise-Matched LNA - Embodiments of an RF front-end are presented herein. In an embodiment, the RF front end comprises a power amplifier (PA), a noise-matched low-noise amplifier (LNA), a balance network, and a four-port isolation module. A first port of the isolation module is coupled to an antenna. The second port of the isolation module is coupled to the balancing network. The third port is coupled an output of the PA. The fourth port is coupled to a differential input of the noise-matched LNA. The isolation module effectively isolates the third port from the fourth port to prevent strong outbound signals received at the third port from saturating the LNA coupled to the fourth port. Isolation is achieved via electrical balance. In an embodiment, the signal path coupling the antenna at the first port to the differential input of the LNA at the fourth port is shorter than a wavelength of the inbound signal received by the antenna. | 03-17-2011 |
| 20110064005 | RF Front-End with Wideband Transmitter/Receiver Isolation - Embodiments of a four-port isolation module are presented herein. In an embodiment, the isolation module includes a step-up autotransformer comprising a first and second winding that are electrically coupled in series at a center node. The first port of the isolation module is configured to couple an antenna to a first end node of the series coupled windings. The second port of the isolation module is configured to couple a balancing network to a second end node of the series coupled windings. The third port is configured to couple a transmit path to the center node. The fourth port is configured to couple a differential receive path across the first end node and the second end node. The isolation module effectively isolates the third port from the fourth port to prevent strong outbound signals received at the third port from saturating an LNA coupled to the fourth port. | 03-17-2011 |
| 20110143822 | FULLY INTEGRATED COMPACT CROSS-COUPLED LOW NOISE AMPLIFIER - Fully integrated compact cross-coupled low noise amplifier. A circuitry implementation that includes two pairs of metal oxide semiconductor field-effect transistors (MOSFETs) (either N-type of P-type) operates as an LNA, which can be used within any of a wide variety of communication devices. A majority of the elements are integrated within the design and need not be implemented off-chip, and this can provide for a reduction in area required by the circuitry. A differential 100Ω input impedance is provided by this design. A higher than typical power supply voltage can be employed (if desired) to accommodate one possible implementation that includes two parallel implemented resistors to ground. | 06-16-2011 |
| 20110158134 | RF Front-End with On-Chip Transmitter/Receiver Isolation Using A Gyrator - An RF front-end with on-chip transmitter/receiver isolation using a gyrator is presented herein. The RF front end is configured to support full-duplex communication and includes a gyrator and a transformer. The gyrator includes two transistors that are configured to isolate the input of a low-noise amplifier (LNA) from the output of a power amplifier (PA). The gyrator is further configured to isolate the output of the PA from the input of the LNA. The gyrator is at least partially or fully capable of being integrated on silicon-based substrate. | 06-30-2011 |
| 20110158135 | RF Front-End with On-Chip Transmitter/Receiver Isolation Using the Hall Effect - An RF front-end with on-chip transmitter/receiver isolation using a gyrator is presented herein. The RF front end is configured to support full-duplex communication and includes a gyrator and a transformer. The gyrator includes a metal plate and an inductor that are configured to isolate the input of a low-noise amplifier (LNA) from the output of a power amplifier (PA) using the Hall effect. The gyrator is further configured to isolate the output of the PA from the input of the LNA. The gyrator is at least partially or fully capable of being integrated on silicon-based substrate. | 06-30-2011 |
| 20110165842 | MULTI-MODE CELLULAR IC FOR MULTI-MODE COMMUNICATIONS - An RFIC includes an RF section, a memory interface, a display interface, an audio codec, a bus matrix, and a processing unit. The RF section converts a first inbound RF signal into a first inbound symbol stream and converts a second inbound RF signal into a second inbound symbol stream. The memory interface is operably coupled to retrieve a video file from memory and the display interface is operable to provide video data to a display. The audio codec converts an output digital signal into an output voice signal. The processing unit converts the first inbound symbol stream into streaming video data; converts the second inbound symbol stream into the output digital signal; and facilitates providing, via the bus matrix, at least one of: the video file to the display interface as the video data; the streaming video data to the display interface as the video data; and the digital output signal to the audio codec. | 07-07-2011 |
