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Rf Transmitter patents



      
           
This page is updated frequently with new Rf Transmitter-related patent applications. Subscribe to the Rf Transmitter RSS feed to automatically get the update: related Rf RSS feeds. RSS updates for this page: Rf Transmitter RSS RSS


Date/App# patent app List of recent Rf Transmitter-related patents
08/07/14
20140218239
 Single-antenna direction finding system for multi-rotor platforms patent thumbnailSingle-antenna direction finding system for multi-rotor platforms
The single-antenna radio frequency (rf), direction finding (df) system includes a single-element directional antenna, which is mounted on a multi-rotor uav (unmanned aerial vehicle) and integrates with a df algorithm for tracking an rf source in the 2.45 ghz ism band (or any other frequency band). The algorithm will depend on the rotating nature of the platform to scan the azimuth, as well as several elevation angles with respect to the platform axis of rotation, and thus be able to accurately locate the coordinates of the rf transmitter based on the recorded power levels.
07/17/14
20140199953
 Active waveform shuttering for rotorcraft patent thumbnailActive waveform shuttering for rotorcraft
In one embodiment a communication system comprises a radiofrequency (rf) transmitter, an antenna communicatively coupled to the rf transmitter to direct an rf signal in a first direction, a laser ranger mounted to the antenna to direct a pulsed laser signal in the first direction and receive reflected laser signals from a rotorblade, and logic to determine a measure of interference resulting from a rotorblade, provide the measure of interference to a radiofrequency (rf) transmitter, and shutter an rf transmission signal from the rf transmitter in response to the measure of interference. Other embodiments may be described..
07/17/14
20140197836
 Determination of specific absorption rate (sar) in magnetic resonance imaging (mri) patent thumbnailDetermination of specific absorption rate (sar) in magnetic resonance imaging (mri)
A magnetic resonance imaging (mri) system includes static and gradient magnetic field generators, at least one radio frequency (rf) coil, at least one rf transmitter and at least one rf receiver. At least one power consumption monitor is coupled to locally measure power consumed by the rf coil.
07/03/14
20140187182
 Method and apparatus for calibrating an envelope tracking system patent thumbnailMethod and apparatus for calibrating an envelope tracking system
A method of calibrating an envelope tracking system for a supply voltage for a power amplifier module within a radio frequency (rf) transmitter of a wireless communication unit is described. The method comprising, within at least one signal processing module of the wireless communication unit, applying a training signal comprising an envelope that varies with time to an input of the rf transmitter, receiving at least an indication of instantaneous output signal values for the power amplifier module in response to the training signal, calculating instantaneous gain values based at least partly on the received output power values, and adjusting a mapping function between an instantaneous envelope of a waveform signal to be amplified by the power amplifier module and the power amplifier module supply voltage to achieve a power amplifier module gain, for example that is monotonically increasing as a function of power amplifier output power..
06/26/14
20140179246
 Broadband re-configurable rf transmitter patent thumbnailBroadband re-configurable rf transmitter
An rf transmitter system operating on a broader frequency range and providing a higher output power dynamic range is described. Low power rf signal is produced from a baseband signal using a quadrature modulator and using a broadband local oscillator signal.
06/26/14
20140177755
 Rf transmitter, integrated circuit device, wireless communication unit and method therefor patent thumbnailRf transmitter, integrated circuit device, wireless communication unit and method therefor
A radio frequency (rf) transmitter includes a power amplifier comprising a plurality of power amplifier cells. At least one digital signal processing module of the rf transmitter is operably coupled to the power amplifier and comprises at least one digital pre-distortion component arranged to apply at least one digital pre-distortion codeword to the plurality of power amplifier cells, wherein the at least one digital pre-distortion codeword is applied to at least one of the plurality of power amplifier cells via a digital filter.
06/19/14
20140169427
 Method and apparatus for calibrating an envelope tracking system patent thumbnailMethod and apparatus for calibrating an envelope tracking system
A method of calibrating an envelope tracking system for a supply voltage for a power amplifier module within a radio frequency (rf) transmitter module. The method includes deriving a mapping function between an instantaneous envelope of a waveform signal to be amplified by the power amplifier module and the power amplifier module supply voltage to achieve a constant power amplifier module gain based on a gain compression factor, setting an envelope tracking path of the transmitter module into an envelope tracking mode in which mapping between the instantaneous envelope of the waveform signal and the power amplifier module supply voltage is performed using the derived mapping function, applying a training signal comprising an envelope that varies with time to the rf transmitter module, measuring a battery current, modifying the gain compression factor based on the measured battery current, and re-deriving the mapping function based on the modified gain compression factor..
06/12/14
20140163423
 Strain monitoring system and apparatus patent thumbnailStrain monitoring system and apparatus
A system for monitoring strain as an indicator of biological conditions, such as spinal fusion, glucose levels, spinal loading, and heart rate. The system includes an inter-digitated capacitor sensor, and rf transmitter, and an associated antenna, all of which are microminiature or microscopic in size and can be implanted in a biological host such as a human or animal.
06/05/14
20140154997
 Rf testing system patent thumbnailRf testing system
An integrated circuit (ic) is provided. The ic includes an rf transmitter configured to generate an rf signal in response to a command signal from test equipment; an rf receiver configured to generate an evaluation signal according to the rf signal, and report the evaluation signal to the test equipment, so that the test equipment performs a test analysis on the evaluation signal to determine a test result, wherein the test equipment is external to the ic..
05/29/14
20140148108
Novel tunable wideband rf transmitter interface
One embodiment of the present invention provides a multi-band rf transmitter. The rf transmitter includes an rf integrated circuit (ic) chip that includes a plurality of identical wideband ports for outputting modulated rf signals, a plurality of narrowband power amplifiers (pas), and a plurality of matching networks.
05/29/14
20140146919
High efficiency adaptive rf transmitter
One embodiment of the present invention provides a system for controlling operations of an amplifier in a wireless transmitter. During operation, the system receives a baseband signal to be transmitted, and dynamically switches an operation mode of the amplifier between a high power back-off mode having a first power back-off factor and a normal mode having a second power back-off factor based on a level of the baseband signal..
05/22/14
20140141735
Rf transmitter having broadband impedance matching for multi-band application support
Systems and methods are provided for a broadband, closed-loop rf transmitter for multi-band applications that employs a single rf path to service multiple bands of operation. Embodiments of the present disclosure implement a broadband impedance matching module, which avoids the need for several costly and complex narrow-band matching networks.
05/15/14
20140135755
Renal catheter shaft design
A medical device for ablation of a target tissue is disclosed. The medical device includes a catheter assembly attached to a balloon for the ablation of the target tissue.
05/15/14
20140134997
Network listen with self interference cancellation
A method for wireless communications includes reducing transmission power, by a femto base station, at its radio frequency (rf) transmitter, and cancelling a transmitted data signal of the rf transmitter at its network listen (nl) receiver. The reduction occurs in response to: occurrence of a network listen process; and/or a signal quality of the local macro coverage area exceeding a threshold quality.
05/15/14
20140134944
Enhanced wireless signal distribution using in-building wiring
Methods and systems of distributing a radio frequency (rf) signal to a wireless device. The methods and systems include providing a rf transmitter having an antenna output, coupling a first end of an existing in-building wire network to the antenna output and transmitting a rf signal from the rf transmitter into the in-building wire network such that the in-building wire network operates as a waveguide.
05/15/14
20140131459
Remote control system for controlling operation of a fan assembly
A remote control system for controlling operation of a fan assembly is provided. The system includes a first sensor module having a first housing, a first sensor, a first microprocessor, and a first rf transmitter.
05/08/14
20140125410
Digital polar and zvs contour based hybrid power amplifier
A power amplifier (pa) which improves dynamic range of previous zvs contour-based power amplifier architectures is presented. The inventive circuit combines zvs contour-based power amplification with a current mode digital-to-analog converter (dac) based digital polar power amplifier.
05/01/14
20140120854
Transmitter architecture and related methods
A radio frequency (rf) transmitter includes one or more power amplifiers and a controller that is configured to adjust amplitudes and phases of rf input signals of the one or more power amplifiers and supply voltages applied to the one or more power amplifiers. In embodiments where multiple power amplifiers are used, a combiner may be provided to combine outputs of the power amplifiers.
04/03/14
20140092054
Hybrid stylus for use in touch screen applications
A touch screen system is configured to sense a proximate or actual touch made to a touch screen panel. In response thereto, an rf transmitter is actuated to emit rf energy.
03/13/14
20140073273
Method and apparatus for calibrating an envelope tracking system
A method of calibrating an envelope tracking system for a supply voltage for a power amplifier module within a radio frequency (rf) transmitter module of a wireless communication unit. The method includes, within at least one signal processing module of the wireless communication unit: applying training signal having time-variant envelope to input of the rf transmitter module; receiving indication of instantaneous output signal value(s) for the power amplifier module in response to the training signal; and adjusting timing alignment between envelope tracking path of the envelope tracking system and transmit path of the rf transmitter module to align envelope tracking power amplifier module supply voltage to instantaneous envelope(s) of a waveform signal to be amplified by the power amplifier module, based at least partly on the received indication of the instantaneous output signal value(s) for the power amplifier module in response to the training signal..
03/13/14
20140073272
Method and apparatus for calibrating an envelope tracking system
A method of calibrating an envelope tracking system for a supply voltage for a power amplifier module within a radio frequency (rf) transmitter module of a wireless communication unit. The method includes, within at least one signal processing module of the wireless communication unit, applying a training signal having an envelope that varies with time to an input of the rf transmitter module, receiving at least an indication of instantaneous output signal values for the power amplifier module in response to the training signal, calculating instantaneous gain values based at least partly on the received output power values, and adjusting a mapping function between an instantaneous envelope of a waveform signal to be amplified by the power amplifier module and the power amplifier module supply voltage to achieve a constant power amplifier module gain..
03/06/14
20140066814
Strain monitoring system and apparatus
A system for monitoring strain as an indicator of biological conditions, such as spinal fusion, glucose levels, spinal loading, and heart rate. The system includes an inter-digitated capacitor sensor, and rf transmitter, and an associated antenna, all of which are microminiature or microscopic in size and can be implanted in a biological host such as a human or animal.
02/27/14
20140056343
Distortion-compensated rf transmitter and method therefor
An rf transmitter (10) includes an rf amplifier (28) that generates an amplified rf signal (36) including a linear rf signal (92) and a spurious baseband signal (94). The spurious baseband signal (94) interacts with bias feed networks (56, 66) to cause the rf amplifier (28) to generate an unwanted rf distortion at or near the allocated rf bandwidth.
02/13/14
20140043138
Key fob with protected biometric sensor
A key fob includes a biometric sensor including a fingerprint area sensor having a surface for receiving a finger, and a controller includes at least one processor configured to authenticate a user of the key fob based on biometric information obtained with the biometric sensor and stored biometric information for an individual. The key fob includes a rf transmitter for communicating stored transaction information to a reader upon authentication of the user and a housing.
02/06/14
20140038667
Mobile wireless communications device with rf lte switches and related methods
A mobile wireless communications device may include an antenna, an lte rf transmitter circuit, and an lte rf receiver circuit. The mobile wireless communications device may also include band pass filters coupled to the antenna and configured to operate at respective different lte rf bands, and rf switches coupled respectively between the band pass filters, and the lte rf cellular transmitter and receiver circuits..
01/23/14
20140022119
Photonically enabled rf transmitter/receiver
A detection system includes a photonic module, a radio frequency (rf) module and processing circuitry. The photonic module may be configured to generate an optical tone for modulation in an optical domain prior to conversion to the rf domain.
01/09/14
20140011464
Technique for radio transceiver adaptation
A technique for adjusting a transceiver capable of operating in compliance with at least one radio communication standard and comprising at least one rf transmitter and at least one rf receiver is disclosed. The technique comprises determining, when the rf transmitter transmits a signal, the amount of signal power leakage from the rf transmitter into the rf receiver, and adjusting, when rf transmitter is configured to transmit in a specific frequency range, one or more parameters of the rf receiver so as to fulfil a receiver requirement as defined in the radio communication standard.
01/09/14
20140007485
Wireless remote aiming systems
Wireless remote aiming systems mounted on a weapon: comprising of an rf transmitter at least three switches mounted the handgrip pcb. The transmitter signal to the receiver activates one or more of at least two lasers and/or the led light source depending on the signal that was sent to the receiver.
01/02/14
20140002258
Smart tire pressure sensor, smart tire pressure monitoring system using same
A smart tire pressure monitoring system includes a plurality of smart tire pressure sensors respectively installed in one respective tire of a vehicle for communication with an electronic control unit in the vehicle through a wireless communication protocol. Each smart tire pressure sensor includes a lf receiver for receiving a low frequency communication signal from the electronic control unit, an encoding identification unit for recognizing the low frequency communication signal and fetching and modulating a corresponding id code, and a rf transmitter for transmitting the modulated id code to the electronic control unit to establish communication..
12/19/13
20130336373
Method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a quadrature feedback mixer configuration
Aspects of a method and system for compensating for estimated distortion in a transmitter by utilizing a digital predistortion scheme with a quadrature feedback mixer configuration are presented. Aspects of the system may include an rf transmitter that enables generation of an rf output signal in response to one or more generated input signals.
12/12/13
20130327280
Leash and collar for animal control
A leash held at one end by a trainer and attached at the other end to a coupler which attaches to either a harness or collar secured to the body of an animal, the coupler having therein an rf transmitter that transmits a signal consisting of one or more pulsed sequences dependent on the actuation of a switch that activates upon sensing a pulling force exerted between the animal and the trainer, said magnitude of force dependent on a spring, housed within the coupler and having an associated preset tension, wherein the rf transmitted signal is received by a receiver and a transducer located in an independent correction collar that transforms the received signal to a corresponding one or more applied electrical or mechanical pulsed forces to the bodily part of the of the animal secured by the correction collar.. .
12/05/13
20130324060
Mobile communications device including an rf transmitter providing impedance fluctuation dampening and related methods
A mobile communications device may include an re signal source configured to generate rf signals over an re frequency band(s), and an rf transmitter coupled to the re signal source. The rf transmitter may include an rf amplifier configured to operate over a plurality of different power control levels.
10/10/13
20130264941
Automotive device controlling operation of optional tail lights equipment
The present invention relates to an automotive device which will control the operation of optional tail lights equipment by monitoring level of current in any motor vehicle oem tail lights electrical circuit. The device comprises a plurality of current sensor modules, each including a current sensor and a rf transmitter antenna, and a brain module including a controller, a rf receiver antenna, and a power source.
09/12/13
20130235953
Wideband power efficient high transmission power radio frequency (rf) transmitter
Embodiments provide transmitter topologies that improve the power efficiency and bandwidth of rf transmitters for high transmission power applications. In an embodiment, the common-emitter/source pa of conventional topologies is replaced with a current-input common-base/gate pa, which is stacked on top on an open-collector/drain current-output transmitter.
09/05/13
20130231805
Swimming hoop rings for detecting safety of children
A swimming hoop ring is provided for detecting safety of children. In one embodiment, a swimming hoop ring includes a ring made of plastic, wherein the ring is being worn by a child; a top gps receiver on a top surface of the ring, wherein the top gps receiver is used to detect location of the ring when the top surface of the ring surfaces onto water; a bottom gps receiver on a bottom surface of the ring, wherein the bottom gps server can be used to detect location of the ring when the top gps receiver fails to operate as the top surface of the ring is flipped upside down into the water; a rf transmitter included in the ring, wherein the rf transmitter can be used to transmit rescue signals; a propeller included in the ring to steer the ring in certain directions; and a weight detector included in the ring to detect if there is a sudden drop of weight of the ring to indicate the child is being unsafe..
09/05/13
20130230115
Signaling in wireless communication systems
A communication device includes an rf receiver that receives a combined signal including a first signal transmitted from a first node and a second signal transmitted from a second node, a channel estimator that estimates first channel information of the first signal and second channel information of the second signal, respectively, a multiuser detector that detects original signal values of the combined signal using the estimated first and second channel information and an rf transmitter that transmits a signal generated based on the values detected by the multiuser detector to the first node and the second node during a predetermined period.. .
08/29/13
20130225224
Independent power consumption management in a mimo transceiver and method for use therewith
An integrated circuit (ic) includes a multi-input multi-output transceiver system that includes a plurality of rf transceivers. Each rf transceiver includes an rf transmitter that transmits a transmit signal at a selected transmit power, based on a transmit power control signal and a corresponding rf receiver for receiving a corresponding one of a plurality of received signals from an external device and for generating a signal strength indication corresponding to each of the plurality of received signals.
08/29/13
20130223503
Reducing signal degradation in wireless communications based on time reversal
Techniques, apparatus and systems for providing radio frequency wireless communications based on time reversal of the channel impulse response of an rf pulse in a transmission channel between an rf transmitter and an rf receiver to enhance reception and detection of an rf pulse at the rf receiver against various effects that can adversely affect and complicate the reception and detection of the rf pulse at the rf receiver.. .
08/15/13
20130210376
Linc transmitter with improved efficiency
A radio frequency (rf) transmitter is provided. The rf transmitter includes first and second drivers that are configured to receive first and second sets of complementary rf signals.
08/01/13
20130194436
Method for conditioning a network based video stream and system for transmitting same
A method for conditioning a network based encoded video stream including receiving the video stream over an rf data link, detecting any missing and/or corrupted data within the data stream, and inserting curative data in place of the missing or corrupted data. A system and method for transmitting a real-time video stream to an end-user at least partially over an rf data link including the video conditioner wherein a camera obtains video footage, an encoder to compresses the video stream, an rf transmitter transmits the encoded video stream over an rf data link, and an rf receiver to receives the encoded video stream from the rf transmitter.
07/25/13
20130188812
Personal sound amplifier
A personal sound amplifier device in the form of a hearing aid worn by a user not only amplifies sounds but also communicates wirelessly with an external electronic device, such as a cellular telephone. The personal sound amplifier device includes a first microphone, an amplification circuit electrically connected to the first microphone, and a speaker electrically connected to the amplification circuit for amplifying ambient sound detected by the first microphone.
07/11/13
20130176175
Apparatus for arrow locating and game tracking
A signal-transmitting arrow operable to transmit an encoded rf signal, an arrow locating and game tracking receiver system for use with the signal-transmitting arrow, and a transmitter-nock unit for installation on an arrow to construct a signal-transmitting arrow. The arrow includes an arrow shaft, an arrow head disposed at an arrow shaft forward end, and a nock disposed at an arrow shaft rearward end.
07/04/13
20130171936
Scheme for relatively low power fm transmissions
Short range fm signal transmission apparatus comprising a generator configured to generate a set of fm transmissions occupying separate bands of frequencies and an rf transmitter configured to transmit the transmissions simultaneously.. .
07/04/13
20130170581
Quadrature digital-if transmitter without inter-stage saw filter and devices using same
An rf transmitter comprises a digital-to-if circuit block configured to receive a digital in-phase baseband signal and a digital quadrature baseband signal and to up-convert the digital in-phase and quadrature baseband signals to a digital in-phase if signal and to a digital quadrature if signal. The wireless rf transmitter further comprises an if-to-rf circuit block configured to convert the digital in-phase and quadrature if signals to analog signals and to up-convert the analog in-phase and quadrature if signals to an rf output signal.
06/27/13
20130165058
Rf transmitter having broadband impedance matching for multi-band application support
Systems and methods are provided for a broadband, closed-loop rf transmitter for multi-band applications that employs a single re path to service multiple bands of operation. Embodiments of the present disclosure implement a broadband impedance matching module, which avoids the need for several costly and complex narrow-band matching networks.
06/27/13
20130162465
Radar device
A radar device includes a signal generator that generates an intermittent signal having a prescribed signal width and signal interval, a transmission signal position adjuster that outputs a transmission signal while adjusting positions of the intermittent signal on the time axis, an rf transmitter that transmits the transmission signal, an rf receiver that receives a reception signal including reflection waves reflected from an object in a measurement subject space, an ad converter that converts the reception signal into a digital signal, and an object detector that detects the object based on the reception signal. The transmission signal position adjuster outputs a transmission signal in which positions of respective signal units of the intermittent signal on the time axis are adjusted in units of a time adjustment amount that is shorter than a sampling interval of the ad converter..
06/20/13
20130157597
Transmit power management for a communication device and method for use therewith
In integrated circuit includes a processing module that determines a selected one of the plurality of power modes based on a function being currently performed by at least one non-transceiver module of a host device, and generates a power mode signal based on the selected one of the plurality of power modes. An rf transmitter generates a transmit signal at a selected one of the plurality of operating power levels based on the power mode signal and that operates from at least one transmitter power supply signal generated and selected by a power management circuit in response to the power mode signal..
06/20/13
20130157588
Power management unit for configurable receiver and transmitter and methods for use therewith
A configurable transceiver includes an rf receiver that generates a stream of inbound data from at least one received rf signal, wherein the rf receiver is configurable in response to a control signal. An rf transmitter generates at least one rf signal from a stream of outbound data, wherein the rf transmitter section is configurable in response to the control signal.
06/13/13
20130148152
Methods and systems for handling fax reception with a high degree of security
Methods and systems for handling fax reception with a high degree of security are provided. The system's components include a fax machine, an optical character recognition (“ocr”) component, a database, a radio-frequency (“rf”) reader configured to detect associated rf transmitters, a processor, and memory.
06/13/13
20130147550
Power amplifier time-delay invariant predistortion methods and apparatus
An embodiment of the invention is a time-delay invariant predistortion approach to linearize power amplifiers in wireless rf transmitters. The predistortion architecture is based on the stored-compensation or memory-compensation principle by using a combined time-delay addressing method, and therefore, the architecture has an intrinsic, self-calibrating time-delay compensation function.
06/06/13
20130142246
Radio frequency transmitter adaptors, methods and articles of manufacture
Radio frequency (rf) transmitter adaptors, methods and articles of manufacture are disclosed. A method of adapting an rf transmitter for using in controlling a radio controlled (r/c) device having an rf receiver includes receiving a pulse-position modulation (ppm) signal from the rf transmitter, automatically selecting a channel assignment map based on the ppm signal, and generating, from the ppm signal, an rf communication signal compatible with the rf receiver for use in controlling the r/c device based on the selected channel assignment map..
05/30/13
20130137387
Rf transmitter for electrically short antenna
An rf transmitter comprises a capacitive energy storage, an output stage and a switching circuit with an open state and a closed state. The capacitive energy storage forms with the antenna when connected thereto a resonance circuit with a resonance frequency and a quality factor.
05/16/13
20130123799
Method and system for performing invasive medical procedures using a surgical robot
A method and system for performing invasive procedures includes a surgical robot which is controlled by a guidance system that uses time of flight calculations from rf transmitters embedded in the robot, surgical instrument, and patient anatomy. Sensors around the room detect rf transmissions emitted by the rf transmitters and drive the robot according to a preprogrammed trajectory entered into the guidance system..
05/09/13
20130115901
Utility meter power arrangements and methods
An arrangement for providing power in a utility meter includes a power supply and at least one capacitor. The power supply is configured to convert input ac voltage to a dc bias voltage, and is further configured to provide the bias voltage to metering circuitry within the utility meter.
05/02/13
20130109326
Rf transceiver with calibrated pre-distortion and methods for use therewith
A radio frequency (rf) transceiver includes an rf receiver having an rf receiver path that processes a received signal to generate inbound data, the receiver path having an rf front-end. A power amplifier calibration module generates power amplifier calibration signals in a calibration mode of operation, and generates power amplifier pre-distortion parameters in response to a calibration feedback signal.
05/02/13
20130107818
Dual association local area network transceiver and methods for use therewith
A radio frequency (rf) transceiver includes an rf section including an rf receiver operable to convert a received rf signal into inbound data and an rf transmitter to convert outbound data into a transmit signal in accordance with a local area network protocol. A processing module configures the rf section for communication with a first remote device via a first frequency channel of the local area network protocol and configures the rf section for communication with a second remote device via a second frequency channel of the local area network protocol to maintain simultaneous association with both the first remote device and the second remote device..
04/25/13
20130102357
Two port antennas with separate antenna branches including respective filters
A communication structure may include a mobile terminal ground plane including a ground point. A primary radiator is electrically coupled to the ground point.
04/11/13
20130090074
Rf transmitter for electrically short antenna
A synthetic-frequency rf transmitter is provided for transmitting an electromagnetic signal via an electrically short antenna. The transmitter comprises a reactive energy storage with an effective reactance adapted to form with the antenna a resonance circuit with a resonance frequency and a driver adapted to provide to the resonance circuit an electric transmission signal having an instantaneous frequency that varies in dependence on an information signal.
04/04/13
20130084816
Wideband power efficient high transmission power radio frequency (rf) transmitter
Embodiments provide transmitter topologies that improve the power efficiency and bandwidth of rf transmitters for high transmission power applications. In an embodiment, the common-emitter/source pa of conventional topologies is replaced with a current-input common-base/gate pa, which is stacked on top on an open-collector/drain current-output transmitter.
03/14/13
20130064405
Hearing assistance devices with echo cancellation
According to various embodiment of a method of operating a hearing instrument, an acoustic signal pathway is provided from a microphone through a signal processor to a hearing instrument (hi) receiver in an acoustic mode of operation. An rf transmit signal pathway is provided from the microphone to an rf transmitter, and an rf receive signal pathway is provided from the rf receiver through the signal processor to the hi receiver in an rf mode of operation.
02/28/13
20130051440
Configurable baseband processing for receiver and transmitter and methods for use therewith
A configurable transceiver includes an rf receiver section that generates at least one downconverted signal from a received rf signal. A receiver processing module processes at least one downconverted signal in a plurality of receiver stages to produce a stream of inbound data, wherein the receiver processing module is configurable in response to a control signal to selectively bypass at least one of the plurality of receiver processing stages.
02/28/13
20130049854
Power efficient radio frequency transmitter
A power efficient, small-packaged radio frequency (rf) transmitter for use in avionics applications. The rf transmitter utilizes cartesian feedback to operate a power amplifier with class ab biasing and efficiency, while delivering class a biasing performance.
02/28/13
20130049735
Radio frequency power amplifier protection system
A radio frequency (rf) power amplifier protection system for a radio. The protection system utilizes a resistive tap connected to the drain of a power amplifier transistor and a high speed voltage detector.
02/07/13
20130033412
Arrangement for wirelessly networking devices in automation technology
An arrangement for wirelessly networking sensors, actuators and at least one shared control unit in automation technology, has a first connection point for receiving an rf transmit signal from an rf transmitter and for providing an rf receive signal from an antenna. The arrangement has a second connection point, which leads to the antenna, and a signal coupler, arranged between the first connection point and the second connection point.
01/03/13
20130002879
Systems and methods for tracking a commodity
A system for monitoring articles within a monitored area is provided. The system for monitoring articles within a monitored area comprises tags configured to be coupled to articles.
01/03/13
20130002225
Current-mode active termination
Embodiments of the present invention, as further described below, provide active termination circuits that can be used with power transmitter circuits. Embodiments reduce power loss due to impedance matching and increase power efficiency in power transmitter circuits.


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Rf Transmitter topics: Rf Transmitter, Transmitter, Transceiver, Automotive, Device Control, Integrated Circuit, Communication System, Communications, Ion Channel, Channel Impulse Response, Differential Impedance, Computer Network, Amplification, Electronic Device, Amplifier Device

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