Convertible To Different Type (e.g., Am To Fm) Patents (Class 455/93)
  • Patent number: 10291181
    Abstract: A supply modulator includes: a voltage generator including output terminals respectively outputting voltages having different levels, and configured to select, in response to a selection control signal corresponding to an envelope signal, at least one of the voltages as a selection supply voltage and to generate the selection supply voltage by performing DC-DC conversion on a power supply voltage; and a switch unit configured to connect an output terminal through which the selection supply voltage is output to a power amplifier, in response to a connection control signal corresponding to the envelope signal.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: May 14, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-su Kim, Ji-seon Paek
  • Patent number: 10193500
    Abstract: A supply modulator includes: a voltage generator including output terminals respectively outputting voltages having different levels, and configured to select, in response to a selection control signal corresponding to an envelope signal, at least one of the voltages as a selection supply voltage and to generate the selection supply voltage by performing DC-DC conversion on a power supply voltage; and a switch unit configured to connect an output terminal through which the selection supply voltage is output to a power amplifier, in response to a connection control signal corresponding to the envelope signal.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: January 29, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-su Kim, Ji-seon Paek
  • Patent number: 8909217
    Abstract: An apparatus for wirelessly connecting a smartphone to a remote FM radio system, for controlling playback of audio content delivered wirelessly to the smartphone via a wide area network, on the remote FM radio system. An apparatus housing receives a DC power signal from a remote DC power source. A control panel has a display and controls for controlling playback of the audio content on the remote FM radio system, at least one of the controls performing a function in common with a playback control appearing on a display of the smartphone. An electronic subsystem communicates with the control panel and wirelessly receives audio content from the smartphone, and communicates the audio content as an FM signal via a user playback command input at the controls of the control panel, to the remote FM radio system.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: December 9, 2014
    Assignee: Myine Electronics, Inc.
    Inventors: Massimo Baldini, Thomas R. Denton, Jacob R. Sigal
  • Patent number: 8811906
    Abstract: The present technology provides an apparatus and a method for transmitting data via two or more FM signals in an interference avoiding manner. The apparatus comprises at least two FM transmitters. Each FM transmitter is configured to transmit a FM signal on a particular FM channel characterized by a certain carrier frequency that includes data and optionally one or more corresponding alternative frequencies (AFs). The apparatus further includes at least two receivers for receiving incoming electromagnetic radiation (EMR). At least one of the receivers is configured to receive incoming EMR associated with at least one of the FM channels, and another is configured to receive incoming EMR at least at frequencies outside of the FM channels. The controller is configured to separately control activation and deactivation of the FM transmitters and determine the carrier frequencies and the one or more AFs based upon incoming EMR.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: August 19, 2014
    Assignee: Sierra Wireless, Inc.
    Inventors: Ashish Syal, Roderick David Earle Filer, Behrouz Pourseyed, Steven John Bennett
  • Patent number: 8755835
    Abstract: A multi-mode handset apparatus may incorporate a radio element that is operative in accordance with a plurality of communication standards. A coexistence engine may arbitrate access to resources of the radio element by media access controllers and baseband components.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: June 17, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Robert B. Ganton, Paramesh Gopi
  • Patent number: 8731490
    Abstract: In transmitter modules or power amplifier (PA) modules there is at least a possible path for a second and even a third harmonic of a low band to crossover unfiltered into the high band path and reach the antenna and hence cross band isolation is necessary. Forward isolation is necessary in order to limit the input crossing over the PAs into the antenna port. According to the methods and the circuits such cross band isolation and forward isolation is improved by detuning the filter and matching network at the output of the PA. The circuit comprises a trap at the harmonic frequencies of the low band thereby at least reducing the impacts of the cross band and forward isolation.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: May 20, 2014
    Assignee: RF Micro Devices (Cayman Islands), Ltd.
    Inventors: Malcolm Smith, Ying Shi
  • Patent number: 8688045
    Abstract: Exemplary embodiments include a frequency modulation (FM) transmitter and a non-FM receiver, which may be implemented on the same IC chip. The FM transmitter may include a digital FM modulator, a lowpass filter, an amplifier, and an LC tank circuit. The digital FM modulator may receive a digital input signal, perform FM modulation with the digital input signal, and provide a digital FM signal. The lowpass filter may filter the digital FM signal and provide a filtered FM signal. The amplifier may amplify the filtered FM signal and provide an output FM signal. The LC tank circuit may filter the output FM signal. The digital FM modulator may perform FM modulation by changing a variable divider ratio of a multi-modulus divider within a PLL. A delta-sigma modulator may receive the digital input signal and generate a modulator output signal used to obtain the variable divider ratio.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: April 1, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: I-Hsiang Lin, Tzu-wang Pan, Yi Zeng
  • Patent number: 8644427
    Abstract: A radio frequency receiver with dual band reception and dual analog-to-digital converters (ADCs) can be configured to operate in a single channel mode or a dual channel mode to receive a single RF input channel or two RF input channels at the same or different frequency bands. In the single channel mode, the dual ADCs can be used to improve the performance of the receiver for the single input signal or the dual ADCs can be configured for reduced power consumption. In the dual channel mode, the dual ADCs operate on the individual RF input signals to realize dual band reception. In one embodiment, the receiver is configured for asymmetric dual band reception to receive a wideband input signal on a first input signal path and a narrow band input signal on a second input signal path.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: February 4, 2014
    Assignee: SiGear Europe Sarl
    Inventors: Alain-Serge Porret, Friederich Mombers, Melly Thierry
  • Patent number: 8600313
    Abstract: A radio communication method in a radio communication system which performs radio communication between a terminal apparatus and a base station apparatus, the radio communication method including: selecting one of a first transmission method or a second transmission method on the basis of transmission power of transmission signal transmitted from the terminal apparatus, in the base station apparatus; and transmitting the transmission signal to the base station apparatus by the selected first or second transmission method, in the terminal apparatus.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: December 3, 2013
    Assignee: Fujitsu Limited
    Inventor: Akira Ito
  • Patent number: 8483630
    Abstract: System for generating a pulsed signal of the ultra wideband type, comprising a device for direct digital frequency synthesis (DDS) comprising a phase accumulator (ACCP) able to deliver at a first frequency (Fclk) phases coded on i bits and spaced apart by a phase increment (?p) differing by a power of two and situated in the vicinity of 2i-1, processing means (MT) able to receive said phases and arranged so as to deliver an amplitude-modulated output signal (SG) whose envelope exhibits a succession of regions respectively delimited by zones of zero amplitude (ZA, ZB), each amplitude-modulated signal part situated in one of said regions forming a pulse of the ultra wideband type (IMP) whose central frequency is equal to said first frequency and whose width depends on the value of the phase increment, and control means (MC) able to regulate the operation of the digital synthesis device so as to selectively deliver one or more pulses of the ultra wideband type.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: July 9, 2013
    Assignees: STMicroelectronics SA, Centre National de la Recherche Scientifique (CNRS)
    Inventors: Andrea Cathelin, Stéphane Thuries, Sylvain Godet, Eric Tournier, Jacques Graffeuil
  • Patent number: 8401462
    Abstract: A media broadcast and distribution system is disclosed which substitutes storage for communications, allowing more efficient use of scarce bandwidth resources. One embodiment allows a terrestrial FM broadcaster to offer a larger number of higher quality audio channels than current satellite radio services such as Sirius and XM Satellite Radio. This embodiment also has features that offer a better user experience than with personal audio devices such as Apple's iPod™. Another embodiment allows satellite radio services to expand their video offerings.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: March 19, 2013
    Inventor: Martin Edward Hellman
  • Patent number: 8355460
    Abstract: A radio transmitter system responsive to a binary signal drives a narrow bandwidth VLF or LF antenna. A generator derives a first variable frequency wave frequency coded based on bit values of a binary signal. An arbitrary impulse response signal processor responsive to the first wave derives a first output signal having real and imaginary components representing the shape of a modulating wave having a variable amplitude envelope and the frequency of the coded values. A transmitter responsive to the processor output signal and a VLF or LF carrier supplies the antenna with another output signal including a modulation wave having a shape that is a substantial replica of the modulating wave shape. The processor causes the signal emitted by the antenna system to include modulation having a shape that is substantially the shape of the first wave.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: January 15, 2013
    Assignee: Continental Electronics Corp.
    Inventor: Daniel L. Dickey
  • Patent number: 8295824
    Abstract: A management unit allocates network resources multiservice communication devices capable of communicating via a plurality of networks. The management unit includes a communication device interface for facilitating a bidirectional data communication with the multiservice communication devices via a wireless control channel, the bidirectional data communication including outbound control data sent to multiservice communication devices and inbound control data received from at multiservice communication devices. The wireless control channel is separate from the communication between multiservice communication devices and the networks. A network interface receives network resource data from the networks. A management processing unit generates the outbound control data in response. The management processing unit facilities the handoff of a real-time service accessed by the multiservice communication devices via a first network to a second network.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: October 23, 2012
    Assignee: Broadcom Corporation
    Inventors: Vinko Erceg, Arya Reza Behzad, David Rosmann, Brima B. Ibrahim, Jeyhan Karaoguz, John Walley
  • Patent number: 8284089
    Abstract: A cyclic digital-to-analog converter includes a first capacitor and a second capacitor. Switching circuitry is selectively configurable to connect the first and second capacitors is at least two modes of operation, wherein a first mode uses the first capacitor during conversion of a bit as a sampling capacitor and uses the second capacitor during conversion of that bit as a holding capacitor, and wherein a second mode uses the second capacitor during conversion of a bit as a sampling capacitor and uses the first capacitor during conversion of that bit as a holding capacitor. A controller swaps converter operation between the first and second modes based on the bit values of a digital word to be converted. If adjacent bits of the digital word to be converted have different logical values, the converter swaps from the first mode to the second mode (or from the second mode to the first mode). Otherwise, the converted remains in the current first or second mode.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: October 9, 2012
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Yannick Guedon
  • Patent number: 8204452
    Abstract: A signal transmission method includes: converting an input signal to generate a first converted signal having a first bandwidth, and a second converted signal having a second bandwidth; mixing the first converted signal with an oscillation signal to generate a first mixed signal, and mixing the second converted signal with the oscillation signal to generate a second mixed signal; and transmitting the first and second mixed signals by different antennas; wherein the input signal has a predetermined bandwidth, the first bandwidth is smaller than the predetermined bandwidth; and the second bandwidth is smaller than the predetermined bandwidth.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: June 19, 2012
    Assignee: Realtek Semiconductor Corp.
    Inventors: Yu-Nan Lin, Kuang-Yu Yen
  • Patent number: 8195143
    Abstract: A management unit allocates network resources to a plurality of multiservice communication devices capable of communicating via a plurality of networks. The management unit includes a communication device interface for facilitating a bidirectional data communication with the plurality of multiservice communication devices via a wireless control channel, the bidirectional data communication including outbound control data sent to at least one of the plurality of multiservice communication devices and inbound control data received from at least one of the plurality of multiservice communication devices, wherein the wireless control channel is separate from the communication between the plurality of multiservice communication devices and the plurality of networks. A network interface receives network resource data from the plurality of networks.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: June 5, 2012
    Assignee: Broadcom Corporation
    Inventors: Vinko Erceg, Arya Reza Behzad, David Rosmann, Brima B. Ibrahim, Jeyhan Karaoguz, John Walley
  • Patent number: 8185099
    Abstract: A service aggregator allocates network resources to a plurality of multiservice communication devices capable of communicating via a plurality of networks. The service aggregator includes a communication device interface for facilitating a bidirectional data communication with the plurality of multiservice communication devices via a wireless control channel, the bidirectional data communication including outbound control data sent to at least one of the plurality of multiservice communication devices and inbound control data received from at least one of the plurality of multiservice communication devices, wherein the wireless control channel is separate from the communication between the plurality of multiservice communication devices and the plurality of networks. A network interface receives network resource data from the plurality of networks.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: May 22, 2012
    Assignee: Broadcom Corporation
    Inventors: Vinko Erceg, John Walley, Arya Reza Behzad, David Rosmann, Brima B. Ibrahim, Jeyhan Karaoguz
  • Patent number: 8180407
    Abstract: A method and system for conserving battery power in a portable communication device. When a user puts the device into a media player mode such as by invoking a media player application on the device, the device will automatically reduce the extent to which it engages in background wireless transmissions, such as radio link control messaging, presence update messaging, and so forth, to help conserve battery power. In turn, when the device exits the media player mode, the device may then automatically revert to its normal extent of background wireless transmission.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: May 15, 2012
    Assignee: Sprint Spectrum L.P.
    Inventors: Jonathan R. Kindred, Geoffrey S. Martin
  • Patent number: 8150333
    Abstract: An exemplary multiband antenna includes an antenna module and a switch module electrically connected to the antenna module. The antenna module includes a first antenna member, a second antenna member, and a third antenna member, which are mounted on a main board. The antenna module is electrically connected or disconnected by operating the switch module to form different antenna structures for receiving different wireless signals.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: April 3, 2012
    Assignee: Chi Mei Communication Systems, Inc.
    Inventors: Te-Chang Lin, Cho-Kang Hsu
  • Patent number: 8095086
    Abstract: The invention relates to a FM simulcast broadcast signal, in which an analogue and digital signal are combined for a transmission in a transmission channel with limited bandwidth as a total signal (s), which has a first phase speed (vs), an auxiliary signal (hs) is prepared in the complex region from the modulated digital signal (ds) for transmission and the FM modulated analogue signal (as) for transmission, which has a second phase speed (vas). Said auxiliary signal (hs) is placed in a used or at least largely unused frequency range of the digital signal (ds). The total signal (s) for transmission comprises the auxiliary signal (hs) and the FM modulated digital signal (ds) and the first phase speed (vs) of the total signal (s) corresponds at least approximately to the second phase speed (vas) of the analogue signal (as).
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: January 10, 2012
    Assignee: Trident Microsystems (Far East) Ltd.
    Inventors: Carsten Noeske, Christian Bock
  • Patent number: 8078122
    Abstract: Circuitry that generates an interface signal between a first and a second integrated circuit (IC). The circuitry includes a reference circuit that provides a reference signal, an interface circuit, and a circuit element. The interface circuit is implemented on the first IC, operatively couples to the reference circuit, receives the reference signal and a data input, and generates the interface signal. The circuit element is implemented on the second IC, operatively couples to the control circuit, receives the interface signal, and provides an output signal. The reference signal can be a voltage or a current signal, and can be generated in the first or second IC. The interface circuit can be implemented with a current mirror coupled to a switch array, and can be oversampled to ease the filtering requirement. The interface signal can be a differential current signal having multiple (e.g., four, eight, or more) bits of resolution. The circuit element can be, for example, a VGA, a modulator, or other circuits.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: December 13, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Gurkanwal Sahota, Mehdi H. Sani, Sassan Shahrokhinia
  • Patent number: 8031082
    Abstract: A meter reading system of the present invention enables transmission of data between utility meter endpoints and readers. In a first embodiment, the endpoint provides a short message providing its identification to the reader and immediately enters a listen mode. If the reader hears the short message, it can immediately respond and request additional information from the endpoint. If the reader does not hear the short message or does not request additional information during the endpoints listening period, the endpoint enters a sleep mode until its next transmission time. In another embodiment, the endpoint transmits an SCM via AM communication to the reader. The reader can then request additional information and the endpoint can respond with the information via two-way FM communication. In another embodiment, the endpoint is capable of transmitting interval data to the reader via either AM or FM communication.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: October 4, 2011
    Assignee: Itron, Inc.
    Inventor: Mark K. Cornwall
  • Patent number: 8027418
    Abstract: To improve an S/N of an AM signal in a diversity reception circuit while suppressing an increase in a circuit size of A/D conversion circuits therein. In the diversity reception circuit, a single AM signal is supplied to each of the A/D conversion circuits provided for A/D converting a plurality of FM signals, and a plurality of obtained results of the conversions are added by an adding circuit, thereby improving the S/N.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: September 27, 2011
    Assignee: Renesas Electronics Corporation
    Inventor: Yuji Motoda
  • Patent number: 7986926
    Abstract: A system includes a cellular radio and an FM transmitter that are fabricated in the same semiconductor. The FM transmitter includes at least one mixer, a filter and an antenna tuning network. The mixer(s) translate an intermediate carrier frequency of an input signal to generate a second signal that has an FM carrier frequency. The filter removes spectral energy from the second signal to generate a third signal. The antenna tuning network is separate from the filter and produces a fourth signal to drive an antenna in response to the third signal.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: July 26, 2011
    Assignee: Silicon Laboratories Inc.
    Inventors: Aslamali A. Rafi, Dan B. Kasha
  • Publication number: 20110105055
    Abstract: A single pole multi throw switch comprises a first switching unit, a second switching unit coupled to a common port and comprising a parasitic off state capacitance, and a matching unit. The matching unit may be coupled between the first switching unit and the common port, wherein the matching unit is configured to contribute, in conjunction with the parasitic off state capacitance of the second switching unit, to an impedance match if the first switching unit is active and the second switching unit is inactive.
    Type: Application
    Filed: October 30, 2009
    Publication date: May 5, 2011
    Applicant: INFINEON TECHNOLOGIES AG
    Inventor: Nikolay ILKOV
  • Patent number: 7924802
    Abstract: Embodiments of the present invention transmit signals simultaneously over a communication channel at different RF center frequencies, and may use a single power amplifier and antenna. In one embodiment the present invention includes a method of transmitting information in a wireless communication channel comprising receiving digital signals having data to be transmitted, converting the signals to analog signals, up-converting each analog signal, combining the up-converted signals, amplifying the combined up-converted signal and transmitting the combined up-converted signal. In one embodiment, the same data is sent over a transmission channel at two different frequencies to improve reliability.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: April 12, 2011
    Assignee: WiLinx Corporation
    Inventors: Alireza Tarighat-Mehrabani, Rahim Bagheri, Alireza Mehrnia, Mahmoud Darvishzadeh
  • Publication number: 20110037612
    Abstract: A meter reading system of the present invention enables transmission of data between utility meter endpoints and readers. In a first embodiment, the endpoint provides a short message providing its identification to the reader and immediately enters a listen mode. If the reader hears the short message, it can immediately respond and request additional information from the endpoint. If the reader does not hear the short message or does not request additional information during the endpoints listening period, the endpoint enters a sleep mode until its next transmission time. In another embodiment, the endpoint transmits an SCM via AM communication to the reader. The reader can then request additional information and the endpoint can respond with the information via two-way FM communication. In another embodiment, the endpoint is capable of transmitting interval data to the reader via either AM or FM communication.
    Type: Application
    Filed: October 26, 2010
    Publication date: February 17, 2011
    Applicant: ITRON, INC.
    Inventor: Mark K. Cornwall
  • Patent number: 7877065
    Abstract: A signal processing circuit having a modulator having frequency conversion circuits, each having a local oscillator and a mixer. The circuit multiplies a signal having a first frequency and a local oscillation signal from the local oscillator at the mixer to convert the frequency of the first frequency signal to a second frequency, outputs a current format frequency converted signal and a first gain control circuit amplifying the current format frequency converted signals from the frequency conversion circuits by a first gain in accordance with a first control voltage. The circuit also outputs the current format amplified signals and a second gain control circuit connected after the first gain control circuit and having at least one gain control circuit which amplifies a current format amplified signal output from the first gain control circuit by a second gain.
    Type: Grant
    Filed: January 4, 2006
    Date of Patent: January 25, 2011
    Assignee: Sony Corporation
    Inventor: Hideo Morohashi
  • Publication number: 20100330936
    Abstract: An exemplary multiband antenna includes an antenna module and a switch module electrically connected to the antenna module. The antenna module includes a first antenna member, a second antenna member, and a third antenna member, which are mounted on a main board. The antenna module is electrically connected or disconnected by operating the switch module to form different antenna structures for receiving different wireless signals.
    Type: Application
    Filed: November 30, 2009
    Publication date: December 30, 2010
    Applicant: CHI MEI COMMUNICATION SYSTEMS, INC.
    Inventors: TE-CHANG LIN, CHO-KANG HSU
  • Patent number: 7801559
    Abstract: A method for transmitting and receiving digitally modulated wireless signals using an analog FM transceiver is provided. The analog FM transceiver has a transmit speech audio frequency band, a receive speech audio frequency band substantially equal to the transmit speech audio frequency band, a subaudible frequency band, a direct microphone audio input, and a direct speaker audio output. The method includes generating, in a baseband digital spectrum translator external to the analog FM transceiver, a baseband transmit signal occupying frequencies substantially within the transmit speech audio frequency band of the analog FM transceiver. The method also includes applying the generated baseband transmit signal to the direct microphone audio input to thereby transmit a digitally encoded RF TX signal having a constant envelope and using the analog FM transceiver to receive a digitally encoded RF RX signal with a constant envelope and to generate a baseband receive signal using the digitally encoded RF RX signal.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: September 21, 2010
    Assignee: Pine Valley Investments, Inc.
    Inventor: Richard Duane Taylor
  • Patent number: 7630734
    Abstract: A mobile wireless communications device is switchable between a plurality of wireless communications operating modes and may include an antenna, a wireless transceiver connected to the antenna, a first memory for storing a respective compressed file for each of the plurality of wireless communications operating modes, and a second memory having a faster access speed than the first memory. The device may further include a processor connected to the wireless transceiver, the first memory, and the second memory for copying the compressed files from the first memory to the second memory, uncompressing a selected one of the compressed files to generate and store a selected compressed file in the second memory, and processing the selected uncompressed file from the second memory and controlling the wireless transceiver based thereon.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: December 8, 2009
    Assignee: Harris Corporation
    Inventors: Mark Sanders, Scott Zeller, Nicholas Stocks, Mark Benoit
  • Patent number: 7623895
    Abstract: The present invention relates generally to an FM transmitter and, more specifically, to an FM transmitter comprised in the headphone or the ear bud accessories to portable audio players. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: November 24, 2009
    Inventor: Edward H. Suber, III
  • Patent number: 7623833
    Abstract: Systems and methods are provided for generating dual outputs in a digital exciter system. A first signal path produces one of a frequency modulated audio signal, a digital information signal, and a signal comprising both frequency modulated audio and digital information. A second signal path produces one of a frequency modulated audio signal, a digital information signal, and a signal comprising both frequency modulated audio and digital information. A main exciter output provides one of the signal produced at the first signal path and the signal produced at the second signal path to an associated first signal destination. An auxiliary exciter output provides one of the signal produced at the first signal path and the signal produced at the auxiliary signal path to an associated second signal destination.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: November 24, 2009
    Assignee: Harris Corporation
    Inventors: George Cabrera, Timothy Wilfred Dittmer, Wayne Douglas-Duello
  • Publication number: 20090190635
    Abstract: One embodiment of the present invention relates to a transceiver. The transceiver includes a transmitter having a first transmission path configured to transmit a digital baseband signal over a wireline medium. In addition, the transmitter has a second transmission path configured to transmit a radio frequency signal over a wireless medium. Other systems and methods are also disclosed.
    Type: Application
    Filed: December 1, 2008
    Publication date: July 30, 2009
    Inventors: Norbert Neurohr, Axel Clausen, Vladimir Oksman
  • Publication number: 20090180403
    Abstract: A multi-band, multi-mode radio frequency (RF) front-end module is capable of operating in widely different frequency bands, including at least one of the following frequency ranges: 700 megahertz (MHz), 850 MHz, 900 MHz, 1800 MHz, 1900 MHz, 2.1 gigahertz (GHz) or 2.4 GHz. The multi-band, multi-mode RF front-end module is also capable of operating according to different mobile communication standards, including at least one of the following standards: GSM, WCDMA, EDGE or LTE. The multi-band, multi-mode RF front-end module includes a plurality of broadband amplifiers, a plurality of transmit (TX) paths selectively connectible to respective broadband power amplifiers; and a plurality of switches. One switch is selectively operable to couple one plurality of TX paths to one broadband power amplifier operable to amplify TX signals within one range of frequencies.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 16, 2009
    Inventor: Bogdan Tudosoiu
  • Publication number: 20090054012
    Abstract: A signal transmission method includes: converting an input signal to generate a first converted signal having a first bandwidth, and a second converted signal having a second bandwidth; mixing the first converted signal with an oscillation signal to generate a first mixed signal, and mixing the second converted signal with the oscillation signal to generate a second mixed signal; and transmitting the first and second mixed signals by different antennas; wherein the input signal has a predetermined bandwidth, the first bandwidth is smaller than the predetermined bandwidth; and the second bandwidth is smaller than the predetermined bandwidth.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 26, 2009
    Applicant: Realtek Semiconductor Corp.
    Inventors: Yu-Nan Lin, Kuang-Yu Yen
  • Publication number: 20080233867
    Abstract: Aspects of a method and system for sharing a single antenna for frequency modulation (FM) transmission or FM reception, and near field communication (NFC) are presented. Aspects of a system may include at least one circuit that enables, via a single antenna, simultaneous transmission of an FM signal and transmission of an NFC signal or reception of an NFC signal.
    Type: Application
    Filed: May 25, 2007
    Publication date: September 25, 2008
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Publication number: 20080214126
    Abstract: An adaptive mode transmitter enables either OFDMA or SC-FDMA modulation schemes to be used during transmission of a wireless signal, such as during mobile phone use. The modulation scheme is selected automatically, and is based on characteristics of the transmitting entity, such as bandwidth allocation, selected modulation order, and transmit power.
    Type: Application
    Filed: March 1, 2007
    Publication date: September 4, 2008
    Inventor: KEITH HOLT
  • Patent number: 7395038
    Abstract: The present invention, generally speaking, provides for high-efficiency power control of a high-efficiency (e.g., hard-limiting or switch-mode) power amplifier in such a manner as to achieve a desired modulation. In one embodiment, the spread between a maximum frequency of the desired modulation and the operating frequency of a switch-mode DC-DC converter is reduced by following the switch-mode converter with an active linear regulator. The linear regulator is designed so as to control the operating voltage of the power amplifier with sufficient bandwidth to faithfully reproduce the desired amplitude modulation wave-form. The linear regulator is further designed to reject variations on its input voltage even while the output voltage is changed in response to an applied control signal. This rejection will occur even though the variations on the input voltage are of commensurate or even lower frequency than that of the controlled output variation.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: July 1, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Earl W. McCune
  • Publication number: 20080146170
    Abstract: A digital to analog conversion (DAC) module includes a digital to analog converter, a sample and hold circuit, and a switch module. The digital to analog converter is coupled to convert a digital signal into an analog signal. The sample and hold circuit is coupled to sample the analog signal to produce a sampled analog signal. The switch module is coupled to provide the analog signal as an output of the DAC module when the DAC module in a first mode and to output the analog signal to the sample and hold circuit when the DAC module in a second mode, wherein the sampled analog signal provides the output of the DAC module in the second mode.
    Type: Application
    Filed: December 13, 2006
    Publication date: June 19, 2008
    Applicant: Broadcom Corporation, a California Corporation
    Inventors: Mohammad Nariman, Alireza Zolfaghari, Hooman Darabi
  • Publication number: 20080139132
    Abstract: Various aspect of a system for a linearized transmitter including a power amplifier may include at least one transconductance amplifier that enables generation of a single analog quadrature signal. Transmitter mixers may enable generation of a plurality of upconverted RF signals in a corresponding plurality of RF processing chains based on the generated single analog quadrature signal. In various embodiments of the invention, a gain stage, for example gain stage, may also be referred to as an RF processing chain. Power amplifier circuit may enable generation of a corresponding plurality of RF output signals within a wireless communication system based on the generated plurality of upconverted RF signals.
    Type: Application
    Filed: June 13, 2007
    Publication date: June 12, 2008
    Inventors: Meng-An Pan, Ali Afsahi, Vikram Magoon, Arya Behzad
  • Publication number: 20080132182
    Abstract: A digital intermediate frequency transmitter for a wireless communication is disclosed. In accordance with the present invention, an improvement of a modulation quality such as an EVM, a linearity and a power consumption is possible, and a main characteristic of a wireless communication transmitter may be embodied at a low cost through an integration such that a high frequency 90° phase shifter, a voltage controlled oscillator having a 2× frequency or higher and a high frequency I/Q local oscillated signals are not required and a side-band signal may be effectively removed.
    Type: Application
    Filed: December 27, 2006
    Publication date: June 5, 2008
    Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE
    Inventors: Hae-Moon SEO, Yeon-Kug Moon, Young-Kuk Park, Kwang-Ho Won, Seong-Dong Kim
  • Patent number: 7379904
    Abstract: Systems and methods for obtaining an offer for a sale of a desired product or a service are provided. The method includes iteratively transmitting a first signal including a first data message using a mobile transceiver device. Each of the first data messages includes information relating to the desired product or service. The method further includes receiving at least one of the first signals having the first data message and determining whether a product or service provider has the desired product or service available for sale. Finally, the method includes transmitting a second signal including a second data message to the mobile transceiver device. The second data message includes an offer to sell the desired product or service.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: May 27, 2008
    Assignees: AT&T Delaware Intellectual Property, Inc., f/k/a BellSouth Intellectual Property Corporation
    Inventor: Steven Tischer
  • Patent number: 7369598
    Abstract: A waveform-adaptive ultra-wideband (UWB) transmitter and noise-tracking UWB receiver for use in communications, object detection and radar applications. In one embodiment, the output of an oscillator is gated by a low-level impulse generator either directly or through an optional filter. In a special case of that embodiment wherein the oscillator is zero frequency and outputs a DC bias, a low-level impulse generator impulse-excites a bandpass filter to produce an UWB signal having an adjustable center frequency and desired bandwidth based on a characteristic of the filter. In another embodiment, the low-level impulse signal is approximated by a time-gated continuous-wave oscillator to produce an extremely wide bandwidth pulse with deterministic center frequency and bandwidth characteristics. The low-level impulse signal can be generated digitally. The UWB signal may be modulated to carry data, or may be used in object detection or ranging applications.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: May 6, 2008
    Assignee: Multispectral Solutions, Inc.
    Inventors: Robert J. Fontana, J. Frederick Larrick, Jr.
  • Patent number: 7346318
    Abstract: In radio communication system that is able to transmit in two or more modulation modes, e.g., one modulation mode when phase shifts are performed and another modulation mode when phase shifts and amplitude shifts are performed, the disclosed invention can avoid that receiving band noise becomes so great not to conform to the GSM standards' prescription for such noise in a high voltage region of the power supply voltage, even when the output power is controlled by changing the amplitude of the input signal to the power amplifier circuitry while fixing the bias voltages to be applied to the power amplifying transistors. When the output power is controlled as above, in the modulation mode (GSM mode) when phase shifts are performed, idle currents flowing across the power amplifying transistors are regulated, depending on the power supply voltage, i.e., the idle currents are decreased when the power supply voltage is high and increased when the power supply voltage is low.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: March 18, 2008
    Assignees: Renesas Technology Corp., Hitachi Hybrid Network Co., Ltd.
    Inventors: Takayuki Tsutsui, Hiroyuki Nagamori, Kouichi Matsushita
  • Patent number: 7280802
    Abstract: An FM transmitter and power supply/charging assembly electrically coupleable with an MP3 player. The assembly includes a modular docking unit having a main body portion with a docking cavity therein, wherein the main body portion contains the FM transmitter and power/charging circuitry, with coupling means in the docking cavity for connecting the MP3 player with the FM transmitter and power/charging circuitry, to accommodate FM transmission by the FM transmitter of audio content when played by the MP3 player in the docking cavity of the modular docking unit, and adapted for transmitting electrical power through the modular docking unit and the power/charging circuitry therein, for charging of a battery of the MP3 player and/or powering of the MP3 player.
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: October 9, 2007
    Assignee: Netalog, Inc.
    Inventor: Jeff Grady
  • Publication number: 20070232245
    Abstract: A wireless audio signal transmitter device capable of automatically and dynamically locking a working frequency for a wireless channel thereof with respect to a wireless audio playing device and a method therefore are disclosed. In locking a wireless channel associated with a working frequency, the wireless audio signal transmitter device automatically and dynamically transmits a sequence of at least a wireless audio signal to the wireless audio playing device. Upon a specific one of the sequence of at least a wireless audio signal having a communication frequency matching with a working frequency of the wireless audio playing device, a sound is played by the wireless audio playing device and received by the wireless audio signal transmitter device. Then, the wireless audio signal transmitter device locks its wireless channel based on the knowledge of the working frequency of the wireless audio playing device.
    Type: Application
    Filed: November 9, 2006
    Publication date: October 4, 2007
    Inventor: Ching-Wei Cheng
  • Patent number: 7242906
    Abstract: An FM transmitter and power supply/charging assembly electrically coupleable with an MP3 player. The assembly includes a modular docking unit having a main body portion with a docking cavity therein, wherein the main body portion contains the FM transmitter and power/charging circuitry, with coupling means in the docking cavity for connecting the MP3 player with the FM transmitter and power/charging circuitry, to accommodate FM transmission by the FM transmitter of audio content when played by the MP3 player in the docking cavity of the modular docking unit, and adapted for transmitting electrical power through the modular docking unit and the power/charging circuitry therein, for charging of a battery of the MP3 player and/or powering of the MP3 player.
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: July 10, 2007
    Assignee: Netalog, Inc.
    Inventor: Jeff Grady
  • Patent number: 7209720
    Abstract: A multiband and multimode transmitter circuit (200) includes two separate oscillators, such as at least a first oscillator circuit (60), a second oscillator circuit (62), a corresponding first signal processing circuit (64), and second signal processing circuit (66) to produce a first output frequency signal (78) defined within the first or second band of frequencies in response to a transmitter input signal (46). Each oscillator and corresponding signal processing circuit (64, 66) may be optimized for the lowest power consumption while meeting the noise performance criteria in each of the multiple frequency bands. The multiband and multimode transmitter circuit (200) may produce the transmitter output signal (36) with either linear modulation or nonlinear modulation and at a first band or second band frequencies.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: April 24, 2007
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Arul Balasubramaniyan, David Peckham
  • Patent number: RE44634
    Abstract: A waveform-adaptive ultra-wideband (UWB) transmitter and noise-tracking UWB receiver for use in communications, object detection and radar applications. In one embodiment, the output of an oscillator is gated by a low-level impulse generator either directly or through an optional filter. In a special case of that embodiment wherein the oscillator is zero frequency and outputs a DC bias, a low-level impulse generator impulse-excites a bandpass filter to produce an UWB signal having an adjustable center frequency and desired bandwidth based on a characteristic of the filter. In another embodiment, the low-level impulse signal is approximated by a time-gated continuous-wave oscillator to produce an extremely wide bandwidth pulse with deterministic center frequency and bandwidth characteristics. The low-level impulse signal can be generated digitally. The UWB signal may be modulated to carry data, or may be used in object detection or ranging applications.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: December 10, 2013
    Assignee: Multispectral Solutions, Inc.
    Inventors: Robert J. Fontana, J. Frederick Larrick, Jr.