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 |
| 8170819 | Systems and methods for measuring non-linear characteristics of a power amplifier A method for measuring non-linear characteristics of a power amplifier is described. A calibration waveform is calculated during a testing procedure period. Amplitude characteristics of the calibration waveform at the output of the power amplifier are measured durin... | 05/01/2012 |
| 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 |
| 8169353 | Wideband digital to analog converter with built-in load attenuator A circuit for digital-to-analog conversion is described. The circuit includes a digital-to-analog converter (DAC). The DAC includes a double cascaded current source and a differential current-mode switch (DCMS). The circuit further includes a direct current (DC) off... | 05/01/2012 |
| 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 |
| 8159255 | Methodologies and tool set for Iverification, debugging and failure diagnosis Quiescent supply current (IDDQ) verification, prediction, and debugging of low power semiconductor devices are enhanced by IDDQ defect diagnosis. If all IDDQ patterns fail verification, per module analysis is performed to sort out po... | 04/17/2012 |
| 8155711 | Service search based on battery charger Aspects describe modifying a service search pattern based on whether a device battery is being charged or is not being charged (e.g., is connected to a battery charger or not connected to a battery charger). A power conservative search pattern can be utilized if the... | 04/10/2012 |
| 8150339 | Switchable-level voltage supplies for multimode communications Switchable voltage level supplies for circuitry in a multi-mode communications chipset are disclosed. In an embodiment, a first voltage level is supplied to TX circuitry operating in a first mode having a first set of linearity and/or noise requirements. A second vo... | 04/03/2012 |
| 8149964 | Symbol scaling with automatic gain control for wireless communication Techniques for scaling symbols to account for large abrupt changes in received power at a user equipment (UE) are described. The UE performs AGC on received samples to obtain input samples. The UE processes (e.g., CDMA demodulates) the input samples to obtain first ... | 04/03/2012 |
| 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 |
| 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 |
| 8143958 | Systems and methods for self testing a voltage controlled oscillator in an open loop configuration Methods and apparatus for self testing a multiband voltage controlled oscillator (VCO) are disclosed. A tuning voltage of the VCO is adjusted where the output of the VCO does not affect the input to the VCO. Frequency bands in the VCO are selected. Output frequencie... | 03/27/2012 |
| 8143957 | Current-mode gain-splitting dual-path VCO Techniques to effectively handle large voltage-controlled oscillator (VCO) gain are described. The techniques utilize (1) a slow high-gain path to provide an average control current that adjusts the center frequency of a VCO and (2) a fast low-gain path to provide a... | 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 |
| 8140316 | Systems and methods for improving digital system simulation speed by clock phase gating An apparatus for simulating digital systems is described. The apparatus includes a processor and memory in electronic communication with the processor. Instructions that are executable by the processor are stored in the memory. A simulation tool is started. The simu... | 03/20/2012 |
| 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 |
| 8135026 | Disjoint and common link operation in a wireless communication system Techniques for supporting communication with disjoint links and common links are described. A sector may broadcast an overhead message and/or send unicast messages to indicate whether the sector supports disjoint links. A terminal may receive at least one message in... | 03/13/2012 |
| 8126484 | Apparatus and methods of sharing contact information between mobile communication devices using short message service Methods and devices are presented for sharing contact information amongst wireless communication devices using Short Message Service (SMS) communication. SMS transfer of contact information occurs seamlessly, in that the sender automatically generates and sends a SM... | 02/28/2012 |
| 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 |
| 8106801 | Methods and apparatus for built in self test of analog-to-digital convertors An apparatus configured for built in self test (BiST) of analog-to-digital convertors (ADCs) is described. The apparatus includes an ADC to be tested. The apparatus includes a ramp generator. The ramp generator provides a voltage ramp to the ADC. The apparatus furth... | 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 |
| 8090068 | System and method of calibrating power-on gating window for a time-to-digital converter (TDC) of a digital phase locked loop (DPLL) A system and method are disclosed related to calibrating a power-on gating window for a time-to-digital converter (TDC) of a digital phase locked loop (DPLL). The gating window is calibrated to ensure proper operation of the DPLL, while at the same time operating th... | 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 |
| 8085873 | Systems and methods for enhanced channel estimation in wireless communication systems Disclosed herein are methods and apparatus for enhancing the estimation of channel response in a wireless communication system. An apparatus (and associated method) for optimizing channel estimation in a communication system includes a receiving antenna; a receiver ... | 12/27/2011 |
| 8081728 | Method and apparatus for clock correction in MIMO OFDM A method of phase correction at a wireless device includes: estimating a phase slope for an OFDM symbol in a data portion of a packet based on an elapsed time from the start of the packet; measuring a residual phase slope from tracking pilots for the OFDM symbol in ... | 12/20/2011 |
| 8081695 | Channel estimation using frequency smoothing A system and method are provided for supplying a frequency-smoothed communications training signal. The method generates a frequency-smoothed unbiased training signal in a quadrature modulation transmitter. The frequency-smoothed unbiased training signal includes a ... | 12/20/2011 |
