Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8185078 | Dynamic spur avoidance for high speed receivers A system and method for implementing dynamic spur avoidance in a high speed receiver environment is provided. For a plurality of radio frequency (RF) input signal ranges, a range of intermediate frequency (IF) signals and a noise floor for each IF signal is determin... | 05/22/2012 |
| 8185077 | Method and system for noise suppression in antenna A system includes an antenna to receive a communications signal, an amplifier coupled to the antenna to amplify the communications signal, and a processor coupled to the amplifier to process the communications signal using high-order statistics to suppress noise in ... | 05/22/2012 |
| 8185079 | Frequency estimation immune to FM clicks An apparatus for reducing audio clicks in frequency modulated radio system includes a receiver for receiving a frequency modulated (FM) signal, and a processor for demodulating the received signal and estimating a frequency error, wherein the processor is configured... | 05/22/2012 |
| 8170520 | Semiconductor integrated circuit device provided with FM receiving function A semiconductor integrated circuit device includes a clock generation unit, a signal processing unit, an FM receiving unit, a processor, and a bus. The signal processing unit, FM receiving unit, and processor operate in synchronization with the clock generated by th... | 05/01/2012 |
| 8135372 | Integrated cancellation circuit for RF converter spurious tones Techniques are disclosed for eliminating or otherwise sufficiently suppressing spurious signals. The techniques are particularly useful in applications such as those that employ aggressor frequency sources along with a frequency conversion or mixing function, and es... | 03/13/2012 |
| 8121575 | Modulated IF receiver and method A modulated intermediate frequency receiver is shown having a low noise amplifier for receiving a radio frequency signal and a modulation source for generating a modulation signal. A local oscillator generates a modulated local oscillator signal in response to the m... | 02/21/2012 |
| 8121576 | Linearity of an RF receive path by spurious tone suppression A method of increasing linearity of an RF signal receive path includes measuring a signal amplified by the receive path. The receive path has a local oscillator operating at an LO frequency and a ground. An error signal is determined from the amplified signal, the e... | 02/21/2012 |
| 8112056 | Distributed direct conversion receiver (DDCR) for UWB systems A novel DDCR RF front-end for use in UWB applications combining a distributed approach which provides wideband functionality of the RF front-end with I-Q requirement of DCRs. The distributed architecture uses composite cells of a merged LNA and mixer along the input... | 02/07/2012 |
| 8112055 | Calibrating receive chain to reduce second order intermodulation distortion Embodiments of apparatuses, articles, methods, and systems for calibrating receive chain to reduce second order intermodulation distortion are disclosed herein. In some embodiments, a reference sensing chain is used to generate reference second-order intermodulation... | 02/07/2012 |
| 8103235 | Communicating apparatus, noise canceling method and memory product A phase and amplitude controller reads from a switching control table an antenna switching number and values of I and Q corresponding to a receiving channel number reported from a W-CDMA receiver module, and outputs the antenna switching number and the values of I a... | 01/24/2012 |
| 8099072 | Frequency changer circuits In accordance with one aspect of the disclosure, apparatus are provided. A filter is provided to receive from an antenna a receive signal of a given type and a low noise amplifier is provided to amplify the received signal. A translator down translates the receive s... | 01/17/2012 |
| 8099073 | Noise reduction in amplifier circuitry using single-sideband chopper stabilization A multi-path amplifier can include a high frequency path, a low frequency path, and a summing node to sum an output from the high frequency path with an output from the low frequency path. The low frequency path can include a flicker noise reduction mechanism includ... | 01/17/2012 |
| 8090338 | Quadratic amplitude control circuit for cosite interference cancellation A quadratic amplitude matching system and associated method with an associated tuning control system is provided for continuously and automatically tuning a quadratic amplitude matching filter (QAMF) to a band center of an interfering signal to provide improved reje... | 01/03/2012 |
| 8090337 | Chirp fourier transform method and apparatus for canceling wide band interference A wide band frequency domain canceller is used in cosite mitigation interference in which a signal tapped from a transmit antenna is coupled to a Chirp Fourier Transform to covert the signal into the frequency domain. The frequency domain signal is vector multiplied... | 01/03/2012 |
| 8090339 | Off-line channel tuning amplitude slope matched filter architecture A tuning control system and associated method is provided for continuously and automatically tuning a lobed amplitude slope matching filter (ASMF) to a band center of an interfering signal to provide improved rejection of an interfering signal coupled from a transmi... | 01/03/2012 |
| 8086205 | Multimode receiver with active blocker suppression Various embodiments of a wireless multimode receiver having an off-chip duplex filter associated with a multimode band, and a blocker cancellation circuit disposed on a semiconductor chip are described in the present disclosure. ... | 12/27/2011 |
| 8086204 | Radio receiving apparatus The radio receiving apparatus includes an adaptive receive filter capable of detecting an interference wave and an out-of-band noise level correctly and improving reception performance. The radio receiving apparatus has a plurality of filters, a received signal powe... | 12/27/2011 |
| 8078131 | Method for mitigating interference A method for mitigating interference is provided. First, a received signal having a training sequence is received from a transmitter. Then, a Signal-to-Interference-plus-Noise Ratio (SINR) of the training sequence in the received signal is calculated, and whether a ... | 12/13/2011 |
| 8068804 | Receiver local oscillator leakage compensation in the presence of an interferer A ZIF radio compensation method is disclosed. The ZIF radio compensation method employs high gain setting compensation values, which are reliably calculated for low gain settings, during entry of the radio into a communications network. Once the network entry is com... | 11/29/2011 |
| 8064865 | Tuning amplitude slope matched filter architecture A tuning control system and associated method is provided for continuously and automatically tuning a lobed amplitude slope matching filter (ASMF) to a band center of an interfering signal to provide improved rejection of an interfering signal coupled from a transmi... | 11/22/2011 |
| 8060047 | Signal frequency band detection device A signal frequency band detection device is disclosed that is able to separately handle plural co-existing signals, and able to separately detect frequency bands used for transmission of these co-existing signals. The signal frequency band detection device includes ... | 11/15/2011 |
| 8055234 | Methods and apparatus for suppressing strong-signal interference in low-IF receivers Circuits and methods are disclosed for compensating for received signal distortion caused by non-linearities in the receiver circuitry. An exemplary receiver circuit includes a distortion waveform generator configured to approximate one or more non-linear response c... | 11/08/2011 |
| 8055235 | System and method for digital interference cancellation A system and method for receiving a signal, comprising an input adapted to receive a radio frequency signal having a strong interferer; a signal generator, adapted to produce a representation of the interferer as an analog signal generated based on an oversampled di... | 11/08/2011 |
| 8050645 | Active resistive summer for a transformer hybrid A communication system includes a first transmission channel with a first end and a second end. The first and second ends are coupled to first and second transformers. First and second end transceivers transmit and receive signals via the first and second transforme... | 11/01/2011 |
| 8050646 | Noise suppressing device To provide a noise suppressing device which accurately suppresses weak electric field strength pulse noise. A band-limiting unit (5) band-limits a composite signal obtained by demodulating an FM baseband signal, to a frequency band equal to or lower th... | 11/01/2011 |
| 8045946 | Active resistive summer for a transformer hybrid A system includes a transceiver configured to receive a composite signal. The composite signal is a composite of a transmit signal and a receive signal. A replica transmitter is configured to generate a replica transmit signal based on the transmit signal. A transmi... | 10/25/2011 |
| 8045944 | Offset correction for passive mixers A downconversion mixer includes a configurable gate or bulk bias voltage to allow calibration and correction of device offsets. Calibration may be performed on the configurable bias voltages to minimize IM2 distortion in the mixer. The techniques have minimal impact... | 10/25/2011 |
| 8045945 | Reception apparatus, reception method and program A reception apparatus including an extraction section; a transmission line characteristic estimation section; an interpolation section; a compensation section; a detection section; and a selection section. ... | 10/25/2011 |
| 8041325 | Speed-based, hybrid parametric/non-parametric equalization A mobile receiver having a multi-mode interference suppression function and a way to estimate its speed utilizes a parametric approach to interference suppression at high speeds, and a nonparametric approach at low speeds. In particular, if the mobile receiver is cu... | 10/18/2011 |
| 8041326 | Data transmission method A data transmission system includes a transmitter configured to transmit a data signal in the form of a data stream of data bursts in at least two transmission modes to a receiver, in the first mode a reference signal being transmitted by the transmitter in each dat... | 10/18/2011 |
| 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 |
| 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 |
| 8027655 | Receiver apparatus and method for tracking and rejecting transmit signal in wireless communication system A receiver apparatus for tracking and rejecting a Transmit (Tx) signal in a wireless communication system and an operation method thereof are provided. The receiver apparatus includes a controller for receiving channel frequency information of the Tx signal and for ... | 09/27/2011 |
| 8023918 | Methods and systems for stereo noise mitigation Methods and systems are disclosed that mitigate stereo noise in FM broadcast receivers by assessing L−R (left-minus-right) and L+R (left-plus-right) levels within tuned FM channels. These assessments are used to facilitate control of a blend from stereo output sig... | 09/20/2011 |
| 8023919 | Receiver dynamically switching to pseudo differential mode for SOC spur reduction A low noise amplifier in an integrated circuit, the circuit having a digital portion and an analog portion on a common substrate, the digital portion having at least one clocking frequency, includes an input configured to receive a signal at a tuned frequency and an... | 09/20/2011 |
| 8023917 | FM tone rejection An interference rejection unit for at least partially rejecting a narrowband interferer from an input signal, the unit comprising: an interferer detector for detecting the phase of an interferer in the input signal; a signal generator for generating a cancellation s... | 09/20/2011 |
| 8000674 | Canceling self-jammer and interfering signals in an RFID system Briefly, in accordance with one or more embodiments, a method and device capable of canceling self-jammer and one or more other interfering signals in an radio frequency identification system or the like is disclosed. ... | 08/16/2011 |
| 7995981 | Receiver with image rejection calibration at an undesired picture carrier and method therefor In one embodiment, a method is provided. An in-band calibration tone is generated at a frequency of an undesired interfering signal. A receiver is calibrated using the calibration tone to reject image interference caused by the undesired interfering signal. ... | 08/09/2011 |
| 7995982 | Semiconductor integrated circuit The present invention aims to efficiently calibrate the characteristics of a pair of reception or transmission low-pass filters by a receiving or transmitting circuit. A semiconductor integrated circuit includes an RF receiver that processes an RF reception signal, ... | 08/09/2011 |
| 7986931 | RFID reader and circuit and method for echo cancellation thereof An echo cancellation circuit for an RFID reader and the method thereof are provided. The echo cancellation circuit includes a gain calculator, a gain adjustment circuit, and a subtraction circuit. The gain calculator provides a complex gain value according to a carr... | 07/26/2011 |
