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| Number | Title | Issue Date |
| 8160526 | Filter configuration for a receiver of multiple broadcast standard signals A filter arrangement for a receiver for multiple broadcast signals includes a first filter for receiving a broadcast signal from a tuner, a second filter coupled to an output of said first filter, said second filter having a variable bandwidth response, said second ... | 04/17/2012 |
| 8145162 | Tuner device A tuner device includes tuner circuits, where each of the tuner circuits includes a radio frequency amplifier amplifying a radio frequency signal of a transmitted broadcast wave, a frequency mixing circuit performing frequency conversion for the transmitted radio fr... | 03/27/2012 |
| 8055223 | Radio receiver A radio receiver includes a down-converter 110 for receiving a radio multiplexed signal containing a first signal and a second signal, multiplying the first signal and the second signal by a mixer 104 to thereby down-convert the radio multiplexed signa... | 11/08/2011 |
| 8055222 | Multiple protocol signal detector A Multiple Protocol Signal Detector, MPSD (320, 500) has a mixer (406) that receives signal energy from a multi-band antenna system (324) via a low noise amplifier (402) and from a variable frequency synthesizer (408) via a first v... | 11/08/2011 |
| 7991370 | Amplifier circuit and receiving device Disclosed herein is an amplifier circuit formed by multiple transistor stages and having an input terminal for a signal and an inverted output terminal configured to output an inverted signal after amplification, wherein a feedback resistance and a feedback capacito... | 08/02/2011 |
| 7885623 | Frequency tunable arrangement A frequency tunable arrangement (ICT) comprises a tunable oscillator circuit (TOC) that provides an oscillator signal (OS). A controllable frequency divider circuit (CDIV, DBT1, DBT2, DBT3, MUX) provides a frequency-divided signal (MO) on the ba... | 02/08/2011 |
| 7840200 | Antenna matching device and transceiver having the same The present invention relates to an antenna matching device that varies a frequency bandwidth according to mobile communication services, and to a transceiver having the same. To this end, an exemplary embodiment of the present invention provides a transceiver that ... | 11/23/2010 |
| 7796962 | Digital demodulating apparatus, digital receiver, controlling method of the apparatus, computer program product, and recording medium recording thereon the product A digital demodulating apparatus includes a tuner that selectively receives one of frequency bands, and a demodulator that demodulates a signal from the tuner. The apparatus further includes a measuring unit that measures on each carrier wave the intensity of noise ... | 09/14/2010 |
| 7725089 | System and method for human body communication A human body communication system. The human body communication system includes a controlled device measuring a capacitance that corresponds to the distance to a human body, and transmitting information on the measured capacitance through a wireless medium; and a co... | 05/25/2010 |
| 7689187 | Dual input low noise amplifier for multi-band operation A dual input low noise amplifier (LNA) for multi-band frequency operation is disclosed. The dual input LNA (100) simultaneously operates in two amplifier configurations for the two inputs (101 and 103), of a first frequency band and a second fre... | 03/30/2010 |
| 7672653 | Removing interfering signals in a broadband radio frequency receiver Various embodiments are directed to removing interfering signals in a broadband radio frequency (RF) receiver by implementing a silicon tuner arranged to replicate high quality factor (Q) performance without the advantages of using high Q components available for mo... | 03/02/2010 |
| 7664476 | Human body communication system and communication device Disclosed herein is a human body communication system for communicating data via an electric field formed by intervention of a human body, the human body communication system including: a transmitter for generating the electric field by transmitting a potential diff... | 02/16/2010 |
| 7634241 | MIMO radio interfaces A receiver front end includes a plurality of in-phase and quadrature phase receive processing blocks operable at first and second frequency bands and further includes a plurality of filtering and amplification blocks disposed within a corresponding ingoing signal pa... | 12/15/2009 |
| 7580689 | Transmission method, transmitter, reception method, and receiver For the purpose of efficient transmission based on the UWB system, first and second baseband waveforms are generated at a cycle equivalent to an integral multiple of a carrier to have a specified phase difference from each other. The first baseband waveform is multi... | 08/25/2009 |
| 7444121 | Methods and apparatuses for reducing interference using frequency division multiple access Methods, systems, and apparatuses are described which are capable of mitigating interference between piconets. Devices on a piconet may detect a certain degree of interference. When this interference is deemed as arising from another piconet, the first piconet may c... | 10/28/2008 |
| 7440736 | Intermediate frequency circuit for television tuner with improved intermediate frequency characteristic An intermediate frequency circuit includes an intermediate frequency tuning circuit which resonates parallel to an intermediate frequency signal, a N−1 channel trap circuit connected to the output of the intermediate frequency tuning circuit, for removing voice si... | 10/21/2008 |
| 7430420 | Cell selection and inter-frequency handover The present invention provides a method and an apparatus for controlling a communications system that includes a mobile wireless device, a first and a second base station and a radio network controller. The communications system may allocate frequency bands to users... | 09/30/2008 |
| 7427907 | Boosted-bias tunable filter with dynamic calibration In a signal communication device, a frequency-selective filter has at least one component that is biased by a control signal to establish a center frequency of the frequency-selective filter. A closed-loop bias generator is provided to generate the control signal an... | 09/23/2008 |
| 7426368 | Satellite broadcasting converter, control circuit incorporated therein, and detector circuit used in such control circuit In a broadcasting satellite converter adapted to be connected to a BS tuner and fed with a power supply voltage signal from the broadcasting satellite tuner, a receiver circuit includes a mixer, and a plurality of local oscillators connected to the mixer to convert ... | 09/16/2008 |
| 7421262 | Tuning method and apparatus for reducing interference between adjacent channels A tuning method comprises: detecting a fundamental intermediate frequency IF0 of a channel to be received; determining whether the fundamental intermediate frequency IF0 is affected by an adjacent channel; when the fundamental intermediate freq... | 09/02/2008 |
| 7415258 | Television tuner capable of reducing gain deviation when low-band or high-band signal is received A television tuner includes: low band and high-band receiving units; a mixer that frequency-converts low-band television signals from the low-band receiving unit or high-band television signals from the high-band receiving unit; first and second switching diodes tha... | 08/19/2008 |
| 7412219 | High-frequency amplifier having simple circuit structure and television tuner using high-frequency amplifier A high-frequency amplifier includes first and second amplifying stages disposed in parallel for amplifying VHF/UHF television signals. The first amplifying stage includes a first FET and a second FET of a grounded-gate type connected in series between a common input... | 08/12/2008 |
| 7376446 | Mobile communications network with expanded carrier capacity and method of expanding base station carrier capacity A base station for a mobile communications system, a mobile communications system including the base station and a method of increasing base station capacity. Each base station antenna is coupled to a transmission line that may be connected to a triplexer. The tripl... | 05/20/2008 |
| 7373115 | Apparatus for transmit and receive switching in a time-division duplexing wireless network A transmit-receive (T/R) switch for coupling a TDD transceiver to an antenna. The T/R switch comprises 1) a first circulator having a first port for receiving a transmit signal from the transceiver during transmit mode, a second port for sending the transmit signal ... | 05/13/2008 |
| 7366487 | Receiving band switching circuit with reduced signal loss upon switching receiving band A receiving band switching circuit includes a first high frequency circuit through which a first frequency band signal passes, a second high frequency circuit through which a second frequency band signal passes, and a third high frequency circuit that is provided in... | 04/29/2008 |
| 7366485 | Multimode wireless transmitter and a portable wireless device using the same The circuits of a multimode wireless transmitter are complex and large, and thus difficult to incorporate in a portable wireless device. This problem is solved for a multimode wireless transmitter by enabling the first frequency mode circuit and the second frequency... | 04/29/2008 |
| 7363015 | Wide-frequency-range television tuner A television tuner includes a tuning circuit having two first varactor diodes for changing a tuning frequency, a mixer for converting a television signal to an intermediate frequency signal, an oscillator having a second varactor diode, and a PLL circuit for outputt... | 04/22/2008 |
| 7359677 | Device and methods for high isolation and interference suppression switch-filter Systems and methods are provided for a stacked die configuration of a high isolation switch and a rejection filter where transmit and receive signals are desired to have a high out-of-band rejection and a low loss band-pass region. In some aspects of the invention t... | 04/15/2008 |
| 7356314 | Systems and methods for reusing a low noise amplifier in a wireless communications device A wireless communication device comprises a plurality of receive signal paths, each of the receive signal paths is configured to receive signals in a certain frequency bandwidth. The communication device also comprises an amplifier coupled with each of the plurality... | 04/08/2008 |
| 7349717 | Front-end circuit for wireless transmission systems A functional block of a front-end circuit for a communication device, which is employed for multi-band and/or multi-mode operation, is proposed. By positioning, according to this invention, a pin diode switch in one of the parallel signal paths instead of positionin... | 03/25/2008 |
| 7342529 | Analog-to-digital-converting and suppressing system A system for converting analog wanted signals to digital wanted signals includes an analog filter, an analog-to-digital-converter, and a compensator. The analog filter at least partly suppresses both the analog wanted signals and analog unwanted signals. The compens... | 03/11/2008 |
| 7343143 | Radio receiver with operation state setting unit There is provided a radio receiver which can set a proper receive state regardless of the existence of an adjacent station. If an adjacent station detection circuit detects an IBOC station having a carrier frequency adjacent to a receive frequency, a control unit tr... | 03/11/2008 |
| 7333053 | Signal path system and method for a ranging signal receiver Methods and receivers determine a range from radio frequency ranging signals at multiple frequencies. The number of dedicated RF sections and correlation processing power is reduced by multiplexing signals from a sub-set of frequencies onto a common path. The common... | 02/19/2008 |
| 7333831 | Interchangeable receive inputs for band and system swappability in communication systems and related methods Interchangeable high band low-noise-amplifiers (LNAs) and low band low-noise-amplifiers (LNAs) and related methods are disclosed that greatly enhance the efficiency of designing handsets for different combinations of frequency bands. The input signals to particular ... | 02/19/2008 |
| 7328011 | Management of mobile networks Exemplary methods and systems manage a mobile network. A mobile network node is managed when the node is connected to the network. However, an alarm is not necessarily generated when the node is not connected to the network. A status message is periodically generate... | 02/05/2008 |
| 7315730 | Architecture for a receiver front end having dual output low noise amplifier driving separate pre-selectors coupled to a transformer for single ended output An architecture for a receiver front end utilizes a dual output low noise amplifier (102) driving separate, fixed preselectors (104, 106) coupled to a transformer (108) to generate a single ended output (113). A pair of blocks coupled in ... | 01/01/2008 |
| 7312672 | Local oscillating circuit for receiving high-band and low-band signal A local oscillating circuit includes an integrated circuit that has an oscillating transistor, protection diodes against electrostatic damage, and first and second terminals each being connected to a base and a collector of the oscillating transistor, cathodes of th... | 12/25/2007 |
| 7304533 | Integrated channel filter using multiple resonant filters and method of operation A circuit includes a first filter comprising a first inductor coupled to a first variable capacitor, wherein the first filter is associated with a first resonant frequency. The circuit further comprises an amplifier coupled to the first filter and a second filter co... | 12/04/2007 |
| 7305250 | Apparatus and method for simultaneously performing a TV reception function and a calling function in a mobile phone A method and apparatus is provided to simultaneously perform a TV reception function and a calling function in a multimode mobile phone supporting two or more communication services. The apparatus comprises a first RF switch separating a received signal into N commu... | 12/04/2007 |
| 7299020 | Tunable multi-band receiver by on-chip selectable filtering A multiple frequency RF communications receiver is disclosed which permits greater integration on standard silicon chips and consumes less power than previous receivers. A new method for selecting the various frequency bands with a high amount of isolation and low p... | 11/20/2007 |
