Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 8175566 | Multiple multi-mode low-noise amplifier receiver with shared degenerative inductors A device with multiple multi-mode low-noise amplifiers (LNAs), each with common operating modes and separate operating frequency bands, are coupled to shared degenerative inductors for common operating modes. Common load inductors are coupled to the multi-mode LNA o... | 05/08/2012 |
| 8170487 | Baseband transmitter self-jamming and intermodulation cancellation device Some embodiments provide a method, system, and apparatus for interference cancellation at the baseband of a receiver. A wireless communication device, having a transmitter and receiver, is provided with an adaptive circuit that cancels interference caused by transmi... | 05/01/2012 |
| 8165186 | Channel estimation for wireless communication Techniques for deriving channel estimates with different channel estimation filters are described. In one scheme, a filter selection metric is determined for a signal to be recovered, a channel estimation filter is selected based on the filter selection metric, and ... | 04/24/2012 |
| 8160514 | Transmission noise cancellation Exemplary embodiments of the disclosure are directed to down-converting an RF signal of a transmitter to baseband, filtering the down-converted signal, and generating a composite signal based on the filtered down-converted signal and a transmission based-band signal... | 04/17/2012 |
| 8149896 | Spur suppression for a receiver in a wireless communication system Techniques for suppressing spurs in a receiver are described. A processor (e.g., within a wireless device) receives digital samples for a desired signal having a spur located within the bandwidth of the desired signal. A spur is an undesired signal that may be gener... | 04/03/2012 |
| 8149165 | Configurable antenna interface Techniques for interfacing a set of active elements with an antenna array. In one exemplary embodiment, the active elements include a plurality of signal paths, each signal path including a mixer coupled to a local oscillator (LO) signal having an adjustable phase. ... | 04/03/2012 |
| 8149050 | Cascaded amplifiers with transformer-based bypass mode Cascaded amplifiers with a transformer-based bypass mode are described. In an exemplary design, an apparatus includes first and second amplifiers and a circuit. The first amplifier (e.g., a driver amplifier) provides amplification in a high gain mode and a bypass mo... | 04/03/2012 |
| 8145171 | Clock clean-up phase-locked loop (PLL) A clock clean-up phase-locked loop (PLL) that may reduce spurs and improve performance of a receiver is described. In one exemplary design, an integrated circuit includes a PLL and an analog-to-digital converter (ADC). The PLL receives a first clock signal generated... | 03/27/2012 |
| 8145141 | Frequency agile transceiver for use in a multi-band handheld communications device A multi-band handheld communications device includes a transceiver including a transmitter having a transmit filter and a receiver having a receive filter, each of the transmit and receive filters having a bandpass region tunable across multiple bands, and a process... | 03/27/2012 |
| 8143941 | Active analog filter having a MOS capacitor device with improved linearity An active analog filter (700, 1000) having a MOS capacitor device (730, 1030) with improved linearity is proposed. In an exemplary embodiment, dc bias voltage sources (755, 745) alter the capacitance of MOS varactors (740, 750) connected ... | 03/27/2012 |
| 8138835 | Wide band LNA with noise canceling Techniques to improve low noise amplifiers (LNAs) with noise canceling are described. LNA includes a first and a second amplifier which work together to noise cancel the noise generated at an input stage circuit. The input stage circuit receives an RF signal and is ... | 03/20/2012 |
| 8138830 | Variable gain instrumentation amplifier Techniques for providing an instrumentation amplifier having a plurality of selectable gain settings. In an exemplary embodiment, a gain adjustment block for accepting a differential input voltage is coupled to a differential-to-single-ended conversion block for gen... | 03/20/2012 |
| 8135348 | Rejection of transmit signal leakage in wireless communication device This disclosure describes techniques for reducing adverse effects of transmit signal leakage in a full-duplex, wireless communication system. The disclosure describes techniques for reducing adverse effects of second order distortion and cross-modulation distortion ... | 03/13/2012 |
| 8120409 | Programmable delay circuit with integer and fractional time resolution A programmable delay circuit capable of providing a delay with integer and fractional time resolution is described. In one exemplary design, an apparatus includes first and second delay circuits. The first delay circuit provides a first delay of an integer number of... | 02/21/2012 |
| 8107910 | Differential to single-ended conversion for radio frequency devices In an exemplary embodiment, a circuit is disclosed comprising a plurality of inputs, each input to receive a radio frequency waveform from a plurality of differential input waveforms having different phases; and an inverter circuit to invert a waveform from the plur... | 01/31/2012 |
| 8107549 | Multi-stage receiver for wireless communication Techniques for receiving a MIMO transmission are described. A receiver processes received data from multiple receive antennas in multiple stages. A first stage performs front-end filtering/equalization on the received data with a front-end filter to process non on-t... | 01/31/2012 |
| 8103301 | Dynamic noise floors in a wireless device A wireless device configured to support a wireless networking protocol may utilize signal processing techniques that can mitigate the effects of jammer signals. For example, when a measured power associated with a digital sample of a received wireless signal is grea... | 01/24/2012 |
| 8102849 | Association procedure to enable multiple multicast streams A method, system and computer program product for a wireless mobile display digital interface (WMDDI) association procedure that allows establishing and joining more than one multicast group to facilitate the interoperability of multiple client devices based on host... | 01/24/2012 |
| 8102213 | Multi-mode low noise amplifier with transformer source degeneration A multi-mode low noise amplifier (LNA) with transformer source degeneration is described. In an exemplary design, the multi-mode LNA includes first, second, and third transistors and first and second inductors. The first transistor has its source coupled to the firs... | 01/24/2012 |
| 8102211 | Rail-to-rail input stage circuit with dynamic bias control An improved rail-to-rail (R-R) input stage circuit with dynamic bias control is described. Input stage circuit includes a differential pair circuit, a level shifted differential pair and a bias control circuit. The differential pair circuit and the level shifted dif... | 01/24/2012 |
| 8102205 | Amplifier module with multiple operating modes An amplifier module with multiple operating modes is described. In an exemplary design, the amplifier module includes an amplifier (e.g., a power amplifier), a switch, and an output circuit. The amplifier receives and amplifies an input signal and provides an amplif... | 01/24/2012 |
| 8098101 | Method of achieving high selectivity in receiver RF front-ends According to some embodiments, an apparatus may comprise an amplifier, wherein the amplifier comprises: an output stage formed of a positive output terminal providing a positive output voltage and a negative output terminal providing a negative output voltage; a loa... | 01/17/2012 |
| 8095082 | Dual band radio frequency transmitter A transmitter includes a transformer and a transformer tuning circuit. The transformer transforms a differential radio frequency (RF) signal to a single-ended RF signal. The transformer tuning circuit tunes the transformer to permit the transmitter to transmit the s... | 01/10/2012 |
| 8094052 | Circuit and method for dynamically selecting circuit elements Techniques for dynamically selecting circuit elements to combat mismatches are described. In one design, an apparatus includes first, second, and third circuits. The first circuit receives input data and provides first signals that are asserted based on the input da... | 01/10/2012 |
| 8090332 | Tracking filter for a receiver A tracking filter for attenuating out-of-band signals and adjacent channel signals in a receiver is described. In one exemplary design, an apparatus includes a tracking filter, an LNA, and a downconverter. The tracking filter includes a summer, a filter, and an upco... | 01/03/2012 |
| 8089854 | Companded transmit path for wireless communication This disclosure describes companded transmit path techniques that may be implemented in a wireless communication device to reduce power consumption and possibly simplify signal modulation. In accordance with this disclosure, in phase (I) and quadrature phase (Q) com... | 01/03/2012 |
| 8072272 | Digital tunable inter-stage matching circuit A tunable inter-stage matching circuit that can improve performance is described. In an exemplary design, an apparatus includes a first active circuit (e.g., a driver amplifier), a second active circuit (e.g., a power amplifier), and a tunable inter-stage matching c... | 12/06/2011 |
| 8060041 | Adaptive receiver for wireless communication device In general, the disclosure is directed to techniques for combining a high performance receiver and a low power receiver within a wireless communication device (WCD) to reduce power consumption. Upon receiving a signal from a base station, a controller within the WCD... | 11/15/2011 |
| 8059748 | Multi-mode and multi-band transmitters for wireless communication Transmitters supporting multiple modulation modes and/or multiple frequency bands are described. A transmitter may perform large signal polar modulation, small signal polar modulation, and/or quadrature modulation, which may support different modulation schemes and ... | 11/15/2011 |
| 8059054 | Compact antennas for ultra wide band applications Compact antennas for ultra wide band applications are disclosed. The compact antenna may be an elliptic dipole antenna with a poise and counterpoise both having an elliptical shape. A substrate may be used to support the poise and counterpoise with the substrate hav... | 11/15/2011 |
| 8058922 | Switch with improved biasing Switches with improved biasing and having better isolation and reliability are described. In an exemplary design, a switch is implemented with a set of transistors, a set of resistors, and an additional resistor. The set of transistors is coupled in a stacked config... | 11/15/2011 |
| 8045996 | Determination of cell RF parameters based on measurements by user equipments Techniques for using measurements made by UEs to improve network performance are described. In one aspect, RF parameters of cells may be determined by taking into account mobility of the UEs. Mobility information for the UEs may be determined based on measurement re... | 10/25/2011 |
| 8036623 | Wireless receiver with notch filter to reduce effects of transmit signal leakage This disclosure describes techniques for reducing adverse effects of TX signal leakage in a full-duplex, wireless communication device. The techniques make use of a notch filter to reject TX signal leakage in a signal processed in the RX path of the wireless communi... | 10/11/2011 |
| 8036622 | DC offset cancellation circuit for a receiver Techniques for cancelling DC offset are described. A DC offset cancellation circuit in a receiver cancels DC offsets caused by leaked LO (local oscillator) signals from a LO signal generator. The receiver first calibrates itself by using the DC offset cancellation c... | 10/11/2011 |
| 8035443 | Amplifier with gain expansion stage Techniques are disclosed for extending an amplifier's linear operating range by concatenating an amplifier exhibiting gain compression with a gain expansion stage. In an exemplary embodiment, a gain expansion stage incorporates a Class-B stage, a Class-AB stage, or ... | 10/11/2011 |
| 8031005 | Amplifier supporting multiple gain modes Techniques for designing a low-noise amplifier (LNA) for operation over a wide range of input power levels. In an exemplary embodiment, a first gain path is provided in parallel with a second gain path. The first gain path includes a differential cascode amplifier w... | 10/04/2011 |
| 8022849 | Phase to digital converter in all digital phase locked loop A phase to digital converter, all digital phase locked loop, and apparatus having an all digital phase locked loop are described herein. The phase to digital converter includes a phase to frequency converter driving a time to digital converter. The time to digital c... | 09/20/2011 |
| 8004438 | Circuit and method for dynamically selecting circuit elements Techniques for dynamically selecting circuit elements to combat mismatches are described. In one design, an apparatus includes first, second, and third circuits. The first circuit receives input data and provides first signals that are asserted based on the input da... | 08/23/2011 |
| 7994870 | Tunable filter with gain control circuit An apparatus includes a filter and a gain control circuit. The filter receives and filters an input signal and provides an output signal in a first mode and operates as part of an oscillator in a second mode. The gain control circuit varies the amplitude of an oscil... | 08/09/2011 |
| 7994850 | Discrete time multi-rate analog filter A discrete time analog filter suitable for use in a receiver and other electronics devices is described herein. In one exemplary design, an apparatus may include a transconductance amplifier, a sampler, and a discrete time analog filter. The transconductance amplifi... | 08/09/2011 |
