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| Number | Title | Issue Date |
| 7957714 | Radio-frequency tuner with differential converter A system for tuning a radio-frequency signal includes a first input path, a second input path, a common reference generator, a selector, a mixer, and a filter. The first input path and the second input path propagate a first single-ended input signal and a second si... | 06/07/2011 |
| 7929932 | Removing harmonic and co-existence interference in radio receivers A wireless device includes a two-stage filter that separates UHF and VHF transmission bands in such a way as to maximize cross channel isolation, so preventing cross channel signal contamination and additionally protecting all signals from host coexistence blocking ... | 04/19/2011 |
| 7650124 | Balanced and unbalanced electronic circuit and television tuner A television tuner includes an unbalanced output type VHF-side block, a balanced output type UHF-side block, and a mixing circuit that performs frequency conversion on the output from the VHF-side block or the UHF-side block. In the television tuner, in a first mode... | 01/19/2010 |
| 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 |
| 7343142 | Tuner A digital terrestrial tuner has an RF input connected to a filter arrangement, whose output signal is supplied to a zero intermediate frequency frequency changer. The filter arrangement comprises a plurality of signal paths of different frequency responses. The sign... | 03/11/2008 |
| 7327406 | Methods and apparatus for implementing a receiver on a monolithic integrated circuit A monolithic integrated circuit includes a tuner and a SAW filter function. The tuner receives a radio frequency (RF) television signal that has a range of fundamental frequencies from 55 mega hertz (Mhz) to 880 Mhz. The tuner down converts the RF television signal ... | 02/05/2008 |
| 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 |
| 7289780 | Band switchable type tuning circuit of television signal A band switchable type tuning circuit has first switch means interposed between a power supply Vcc and an anode of a switch diode, a first resistor whose one end is connected to a cathode of the switch diode, second switch means interposed between the other end of t... | 10/30/2007 |
| 7286794 | Method and system for joint broadcast receiving and cellular communication at mobile terminal or device without service control Methods and systems for communicating information via a plurality of different networks are disclosed herein. Aspects of the method may comprise receiving broadcast information in a mobile terminal via a VHF/UHF broadcast communication path. Cellular information in ... | 10/23/2007 |
| 7283795 | Receiver device having improved selectivity characteristics In a UHF band operation, a Bu terminal supplies a power supply voltage, and a (BL+BH) terminal does not supply the power supply voltage. Thereby, switching diodes are turned on, and a switching diode is turned off. In the UHF band operation, only a UHF signal in a s... | 10/16/2007 |
| 7272373 | Ratiometric clock systems for integrated receivers and associated methods A ratiometric clock system for an integrated receiver and associated method are disclosed that provide an advantageous solution for combining digital signal processing (DSP) circuitry on the same integrated circuit as mixer and local oscillator (LO) generation circu... | 09/18/2007 |
| 7272374 | Dynamic selection of local oscillator signal injection for image rejection in integrated receivers A system and method are disclosed for dynamically selecting high-side injection or low-side injection of local oscillator mixing signals based upon an assessment of signal power within the input signal spectrum that could cause unwanted images in the processed signa... | 09/18/2007 |
| 7269399 | Receiver of double conversion system with antenna tuning with variable capacitance using digital-to-analog converter having temperature coefficient setting section A receiver of double conversion system wherein unwanted components included in received signals can be removed without fail and wherein the number of constituent parts has been reduced. The receiver comprises an antenna tuning circuit 10 including a tuning co... | 09/11/2007 |
| 7224235 | Phase-accurate multi-phase wide-band radio frequency local oscillator generator A local oscillator (LO) generator for driving a bank of mixers that provides precise phase relationship between multi-phase LO outputs comprises a shift register using slave-master-slave flip-flop elements. The LO generator can be used over a wide operating frequenc... | 05/29/2007 |
| 7196738 | Tuner integrated circuit and television tuner using the same circuit One embodiment of a tuner integrated circuit includes two mixer circuits, an IF amplifier circuit, three oscillation circuits, a PLL circuit, and a reference oscillation circuit. A plurality of terminals are provided at two sides of the tuner integrated circuit and ... | 03/27/2007 |
| 7184733 | High frequency receiving device, integrated circuit used for the same, and TV receiver using them An oscillation frequency changing means is inserted between a tuner and an oscillator of local oscillator (56) of a high frequency receiving device, and the oscillation frequency changing means, in each frequency band received, changes the oscillation frequen... | 02/27/2007 |
| 7155184 | Triple band receiving apparatus for a mobile communication terminal A triple band receiving terminal of a mobile communication system operates in three bands by installing an impedance matching unit and a band selection switching unit at the exterior of a dual band RF receiver. The triple band receiving terminal includes three filte... | 12/26/2006 |
| 7142833 | Matching unit A matching unit includes a switching means for switching an inductance of a first inductor. This switching means sets an inductance such that a first inductor shows an inductance property to both of the VHF low-band and high-band, and shows a capacitance property to... | 11/28/2006 |
| 7139039 | Input circuit of television tuner A VHF tuning circuit includes two tuning inductance devices connected in series with each other and having a junction thereof connected to an input terminal, and a first switch diode connected in parallel with the two in series inductance devices, and turned OFF at ... | 11/21/2006 |
| 7129994 | Television tuner having level of harmonics of oscillation signal suppressed low The level of the harmonics of oscillation signals for synchronous detection to be inputted to a mixer circuit for converting frequencies is suppressed low. A first integrated circuit component formed with a first mixer circuit for converting frequencies; a second in... | 10/31/2006 |
| 7127217 | On-chip calibration signal generation for tunable filters for RF communications and associated methods On-chip calibration signal generation circuitry is disclosed for filter tuning for radio-frequency communications and associated methods. On-chip circuitry generates a calibration signal that is used to help set a tuning control signal that is received by a tunable ... | 10/24/2006 |
| 7123309 | Television tuner suitable for demodulation of both analog signals and digital signals There are provided a mixer for subjecting entered digital television signals or analog television signals to frequency conversion into an intermediate frequency band and an intermediate frequency tuning circuit so configured as to enable tuning frequency to be switc... | 10/17/2006 |
| 7120405 | Wide bandwidth transceiver The wide bandwidth transceiver includes a receiver section, a transmitter section, and a local oscillation module. The receiver section includes a 1st receiver intermediate frequency (IF) stage, a receiver switch module, and a 2nd receiver IF s... | 10/10/2006 |
| 7116960 | Image-rejecting antenna apparatus An image-rejecting antenna apparatus includes an antenna unit for receiving or transmitting a wireless signal and an image-reject unit for removing an image component signal having a predetermined frequency from among signals received from the antenna unit. In an im... | 10/03/2006 |
| 7102465 | Frequency discrete LC filter bank An inductive (“L”)-capacitive (“C”) filter bank has application for use in a television receiver. The LC filter includes inductors configured in at least one inductive (“L”) bank, and capacitors configured in at least one capacitive (“C”) bank. The i... | 09/05/2006 |
| 7088202 | Methods and apparatus for an improved discrete LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ... | 08/08/2006 |
| 7088984 | Electronic tuner An electronic tuner of the present invention is arranged such that between an input part of the amplifying circuit and the ground serially connected are a coil and a diode, and a capacitor is connected between the ground and a connecting part between the coil and th... | 08/08/2006 |
| 7071799 | High performance switch for switched inductor tuned RF circuit A Radio Frequency (RF) circuit includes an active portion and a tuned portion. The active portion receives an RF signal and that operates upon the RF signal. The tuned portion couples to the active portion and includes a first inductor, a second inductor, and an NMO... | 07/04/2006 |
| 7035591 | Ceramic microelectromechanical structure A microelectromechanical structure and method is disclosed. A ceramic substrate preferably is formed from low temperature co-fired ceramic sheets. A low loss photodefinable dielectric planarizing layer is formed over one surface of the ceramic substrate. This layer ... | 04/25/2006 |
| 7019790 | Integrated tuner circuit and television tuner using an integrated tuner circuit An integrated tuner circuit includes a first terminal to which a UHF TV signal is input via a UHF amplifier. The amplifier is switched to an operating state when a UHF TV signal is received. A switching-voltage generation circuit includes a first switching circuit f... | 03/28/2006 |
| 6995808 | Television tuner A front end tuner for receiving TV signals and the like includes a frequency conversion circuit including a mixer for beating a local signal with received signals within a predetermined band of frequencies to provide selected signals within a predetermined band of f... | 02/07/2006 |
| 6957053 | Method for selection of a receiver tuning frequency Method for tuning the reception of radio broadcast signals to an FM RDS transmitter using program related data and transmitter related data and receiver executing the method, providing a band scanning search for detecting FM RDS transmitters exceeding a predetermine... | 10/18/2005 |
| 6944431 | High-frequency signal transmission apparatus and electronic tuner using the same An electronic tuner has an input terminal, a mixer receiving the signal fed into the input terminal, a matching circuit connected to an output of the mixer, a band-pass filter connected to an output of this matching circuit, an intermediate-frequency (IF) amplifier ... | 09/13/2005 |
| 6940365 | Methods and apparatus for an improved discrete LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ... | 09/06/2005 |
| 6933984 | Television tuner which maintains UHF band tuning circuit bandwidth constant in low to high band range A tuning circuit's bandwidth is maintained almost constant throughout a UHF low to high band range so as to prevent interference by a neighboring channel, particularly in receiving high band television signals, and also to improve NF in receiving low band television... | 08/23/2005 |
| 6914639 | Combination tuner capable of receiving television signal and FM signal A combination tuner includes a switching circuit having three transistors which are selectively turned on and off so that one of a television signal received by a first signal receiving unit using an external antenna that is a high sensitivity antenna, an FM signal ... | 07/05/2005 |
| 6903783 | Tuner for receiving television signal in VHF band and UHF band In a television tuner, a predetermined bias voltage is applied to the anode of a first switching diode. A power supply voltage is applied to the collector of a switching transistor via a power supply resistor, and the emitter of the switching transistor is grounded.... | 06/07/2005 |
| 6760079 | TV tuner unit having a resonance network A TV tuner unit uses a frequency-selective element before or after the resonance stage of either a UHF or VHF tuner for separation of UHF signals from VHF signals. Thus, performance is preserved while eliminating the need for circuitry including high and low pass fi... | 07/06/2004 |
| 6751449 | Circuit configuration for band changeover in high-frequency receivers Conventional circuit configurations for range changeover between different bands (UHF, VHF) in television receivers utilize MOS tetrodes whose operating point adjustment is unproblematic. The MOS tetrodes of the inventive circuit configuration comprise a constant po... | 06/15/2004 |
| 6750734 | Methods and apparatus for tuning an LC filter A receiver, such as a television receiver, tunes an inductive (“L”) and capacitive (“C”) filter based on a desired frequency. The LC filter includes a plurality of inductors, configured in at least one inductive (“L”) bank, and a plurality of capacitors ... | 06/15/2004 |
