Abstract: A method includes transmitting a first set of transmission signals over an operating frequency band. The method includes detecting if a second set of transmission signals are transmitted adjacent the operating frequency band and reducing power to a subset of the first set of transmission signals when the second set of transmission signals are detected.

Abstract: A system comprises a first amplifier stage including a first amplifier, a second amplifier stage including second and third amplifiers, and a fourth amplifier. The first amplifier stage includes an input and an output. The second amplifier stage is coupled between the output of the first amplifier stage and a first output node. The fourth amplifier is coupled between the input of the first amplifier stage and a second output node.

Abstract: A device for multiple band frequency communication may include a chassis, a transceiver for receiving and transmitting voice and data communications over any one of multiple frequency bands, an antenna assembly comprising a single radiator and an antenna matching unit, and an antenna connector provided on the chassis for mounting the antenna assembly to the device and connecting the antenna assembly to the transceiver via a transmission line, wherein the antenna matching unit is provided between the radiator and the antenna connector and comprises a reactive circuit to filter the communications and transform an impedance between the radiator and the antenna connector to match an impedance between the transceiver and the antenna connector for each of the multiple frequency bands. A method and system is disclosed for communicating voice and data communications over multiple frequency bands.

Abstract: A TV tuner includes an Ultra High Frequency (UHF)/Very High Frequency (VHF) tracking filter, an UHF/VHF matching circuit and a single conversion Tuner IC. The UHF/VHF tracking filter includes a first Low-Temperature Co-fired Ceramics (LTCC) inductor, a first varactor diode and a fine-tune capacitor electrically connected to determine the maximum gain frequency of the UHF/VHF tracking filter. The UHF/VHF matching circuit includes a second LTCC inductance, a second varactor diodes and a fine-tune capacitor electrically connected to determine the maximum gain frequency of the UHF/VHF matching circuit.

Abstract: A TV tuner includes an Ultra High Frequency (UHF)/Very High Frequency (VHF) tracking filter, an UHF/VHF matching circuit and a single conversion Tuner IC. The UHF/VHF tracking filter includes a first Low-Temperature Co-fired Ceramics (LTCC) inductor, a first varactor diode and a fine-tune capacitor electrically connected to determine the maximum gain frequency of the UHF/VHF tracking filter. The UHF/VHF matching circuit includes a second LTCC inductance, a second varactor diodes and a fine-tune capacitor electrically connected to determine the maximum gain frequency of the UHF/VHF matching circuit.

Abstract: A TV tuner includes an Ultra High Frequency (UHF)/Very High Frequency (VHF) tracking filter, an UHF/VHF matching circuit and a single conversion Tuner IC. The UHF/VHF tracking filter includes a first Low-Temperature Co-fired Ceramics (LTCC) inductor, a first varactor diode and a fine-tune capacitor electrically connected to determine the maximum gain frequency of the UHF/VHF tracking filter. The UHF/VHF matching circuit includes a second LTCC inductance, a second varactor diodes and a fine-tune capacitor electrically connected to determine the maximum gain frequency of the UHF/VHF matching circuit.

Abstract: A receiver comprises a radio frequency splitter and respective tuning elements, which are coupled to respective outputs of the radio frequency splitter One of these tuning elements has a control terminal coupled to receive a direct current control signal via a radio frequency-blocking circuit. A direct current path extends, via the radio frequency splitter, from the aforementioned control terminal to a control terminal of another tuning element.

Abstract: A tuner integrated circuit is connected, in a preceding stage thereof, to an RF amplifier including a UHF dual gate FET and a VHF dual gate FET. In the reception of a signal of the UHF band, a television signal output from the UHF dual gate FET is input to a UHF RF circuit via a UHF multiple-tuning circuit. In the reception of a signal of the VHF band, a television signal output from the VHF dual gate FET is input to a VHF RF circuit via a VHF multiple-tuning circuit. A VHF input terminal of the VHF RF circuit is connected to the ground via between a collector and an emitter of a transistor. In the reception of the signal of the UHF band, the transistor is turned on.

Abstract: 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 single-ended input signal, respectively, to the selector. The selector converts the first single-ended input signal and the second single-ended input signal into a first differential input signal and a second differential input signal, respectively, using a reference signal generated by the common reference generator. The selector selectively couples one of the first and the second input path to an input of the mixer. The mixer downconverts a selected on of the differential input signals received from the selector. The filter attenuates a portion of the downconverted input signal outside a passband associated with the filter.

Abstract: A method for an antenna architecture that handles World band cellular and broadcast channels may be provided. The method may comprise receiving at a first radio frequency integrated circuit (RFIC) integrated within a mobile terminal, first signals via a first antenna, where the first signals comprise signals within at least one of a 2100 MHz band and a 1900 MHz band. The method may further comprise receiving at a second RFIC integrated within the mobile terminal, second signals via the first antenna, where the second signals comprise signals within at least one of a 1900 MHz band, a 1800 MHz band, a 900 MHz band and a 850 MHz band. Additionally, third signals may be received via the first antenna at a third RFIC integrated within the mobile terminal, where the third signals comprise signals within a VHF/UHF broadcast band.

Abstract: 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 transmissions and harmonics of the wanted signals without the requirement for additional or selectable filter arrangements.

Abstract: A method is provided for controlling TCP/IP access includes receiving a request from a requestor for data transmission over a satellite communication channel, determining whether the request for data transmission has collided with a separate request for data transmission, if the request for data transmission has collided with a separate request for data transmission, then accepting the request for data transmission, else, temporarily denying the access to the satellite communication channel, determining the priority of the requestor and the number of users on the satellite communications channel, determining the access to the satellite communication channel of the requestor based on the priority of the requestor and the number of users on the satellite communication channel, and monitoring access to the satellite communication channel based on the priority of the requestor and the number of users on the satellite communication channel.

Abstract: Systems and methods of unlicensed bi-directional communications over Ultra-High Frequency (UHF) band reserved for licensed communications are provided. A base transceiver station scans the UHF band to identify unused frequency bands. When an unused frequency band is detected, the base transceiver station transmits a tone indicating that the unused frequency band can be used for communicating with the base transceiver station. When the base transceiver station determines that the unused frequency band is being used, then the base transceiver station scans the UHF band to identify another unused frequency band for communications.

Abstract: An integrated front-end filter for a tuner provides an array of from several to a multitude of passbands, each for passing at least one but less than all channels designated in a band of frequencies. Each passband is exclusively selectable. The integrated front end filter includes at least one active filter unit with an active reactance element in either of fixed and variable filter configurations and a decoder coupled to said at least one active filter unit and being responsive to a control signal for selecting a one of the passbands. In one example a multitude of active filter units of fixed filter configuration provide the multitude of passbands. Each data is stored at a predetermined location and reproduced in response to a corresponding control data signal from a tuner controller. Each data characterizes one of the plurality of passbands. The filter element is switchable from one passband to another in response to the control data signal.

Abstract: 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 where the VHF-side block is connected to the mixing circuit, a first terminal, to which the unbalanced output is applied, is coupled to a first input terminal of the mixing circuit, and a second input terminal of the mixing circuit is grounded. Further, in a second mode where the UHF-side block is connected to the mixing circuit, a second terminal and a third terminal, to which the balanced output is applied, are coupled to the first and second input terminals of the mixing circuit.

Abstract: A tuner, a broadcast signal processing apparatus and method, which satisfy reception sensitivity of both terrestrial and cable televisions, when selecting a broadcast signal through a single conversion tuner, are provided. A tuner selects a broadcast signal of a selected channel. The tuner includes an input filter that filters a received broadcast signal into plural frequency bands based on a predetermined frequency band. An amplifier amplifies a second signal having an original phase induced by an output signal of the respective frequency bands, and a first signal having an opposite phase of the second signal, and outputs the signal induced by the amplified first and second signals as an amplification signal of the signal in the respective frequency bands. An inter-stage filter filters a frequency of the broadcast signal corresponding to the selected channel among the amplification signals output from the amplifier.

Abstract: 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 transmissions and harmonics of the wanted signals without the requirement for additional or selectable filter arrangements.

Abstract: An antenna setting apparatus that allows a user to receive a broadcast from a desired direction easily and excellently is configured as follows: an antenna setting apparatus includes: a control unit changing the direction of a smart antenna with high sensitivity; a tuner extracting a signal; a CPU controlling the control unit, controlling the frequency of the signal extracted by the tuner and controlling the control unit to change the direction with high sensitivity; an OSD outputting an information set represented by the signal; a remote control reception unit accepting a selection; a first area of a memory storing an information set, where the information set is stored in association with the direction of the smart antenna and the frequency of the signal; and a second area of the memory storing the direction and the frequency corresponding to the information set designated by the selection.

Abstract: A CATV tuner includes a metallic housing having first through fourth partitioned chambers. In the first through fourth partitioned chambers, a data circuit, an input filter circuit, a first mixer circuit, a first local oscillation circuit, a first intermediate frequency circuit, and other elements are housed. In the fifth partitioned chamber, a second intermediate circuit and an IC including a second local oscillation circuit are housed. With this configuration, the CATV tuner defines an up/down tuner. The third partitioned chamber in which the first local oscillation circuit is housed and the fifth partitioned chamber in which the second local oscillation circuit is housed are located adjacent to each other. Lines and terminals are used both for a first PLL circuit and a second PLL circuit.

Abstract: 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 that couple the low-band or high-band receiving unit and the mixer to each other, respectively; and a transistor which applies a bias voltage to one end of each of the switching diodes. The emitter of the transistor is grounded and the collector is pulled up to a power supply through a resistor. ON/OFF of the switching diodes are switched to be opposite to each other. The other end of each of the switching diodes is connected to the collector through a first inductance element. The collector of the transistor is connected to one end of a second inductance element, and the other end of the second inductance element is grounded in a high-frequency manner.

Abstract: 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 signal paths are selectable one at a time for insertion between the tuner input and the frequency changer. At least one of the signal paths comprises a non-tracking filter which provides attenuation of out-of-band signals so as to reduce harmonic mixing caused by harmonics of the frequency changer commutating signal or by harmonics of spurious signals at lower frequencies.

Abstract: 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 the protection diodes being respectively connected to the first and second terminals and anodes thereof being connected to a ground; and a resonating circuit that is provided outside the integrated circuit and is connected between the first and second terminals. A reverse-biasing voltage is applied to each of the cathodes of the protection diodes when VHF high-band signals are received while a voltage is not applied to each of the cathodes when VHF low-band signals are received.

Abstract: 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 the first resistor and a ground, a second resistor connected between the power supply Vcc and a connection point of the first resistor and the second switch means, and the third resistor connected between the ground and a connection point of the first switch means and the anode of the switch diode. The first switch means and the second switch means are turned on or off together by means of a band switching voltage.

Abstract: 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 the mobile terminal comprising voice and data may be received via at least one cellular communication path. Reception in the mobile terminal may be switched between reception of the broadcast information via the VHF/UHF broadcast communication path and the cellular information via the at least one cellular communication path based on a preference indicated via the mobile terminal. The preference may be indicated via a software-controlled interface and/or a user-controlled interface. Reception in the mobile terminal may be switched between reception of the broadcast information via the VHF/UHF broadcast communication path and the cellular information via the at least one cellular communication path based on user input.

Abstract: 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 signal provided from an ANT terminal is output to a UHF input tuning circuit. In a VHF band operation, the (BL+BH) terminal supplies the power supply voltage, and the Bu terminal does not supply the power supply voltage. Consequently, the switching diode is turned on, and the switching diodes are turned off. In the VHF band operation, only a VHF signal in the signal provided from the ANT terminal is output to a VHF input tuning portion via a filter portion.

Abstract: 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 frequency characteristic of local oscillator (56) in relation to the tuning voltage supplied from PLL circuit (78), and operates in accordance with the frequency characteristic of tuning filter (52, 54, 62, 64) to obtain an oscillation signal varied just by a predetermined frequency, thereby making it possible to receive broadband channels of continuous VHF broadcast band and UHF broadcast band.

Abstract: 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 the UHF band. This structure allows the matching unit to achieve the matching for both the VHF low-band and high-band by just switching the two circuits of the VHF low-band and high-band, also allows the matching unit to show a capacitance property to the UHF band. Thus the loss produced in transmitting signals can be reduced, and the circuit can be simplified. As a result, the matching unit can be downsized, and the cost can be reduced.

Abstract: 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 least when tuning is performed with a low range of a VHF band. A UHF tuning circuit is connected to the input terminal through a second switch diode that is turned ON at least when tuning is performed with a UHF band. The second switch diode is turned OFF when tuning is performed with a low range of the VHF band.

Abstract: 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 for generating a switching voltage used to switch the operating state of a UHF high-frequency amplifying circuit.

Abstract: 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 predetermined reception quality level. To enhance efficiency in data processing and use of storage capacity, transmitter related data including tuning data is stored separately from program related RDS data. Per each detected transmitter a permanency factor indicating the permanency in reception quality thereof is being allocated to each detected RDS transmitter and stored in a first memory bank, along with the relevant tuning data.

Abstract: 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 connected to an output of the band-pass filter, and an output terminal receiving output of the IF amplifier. These circuits are composed of balanced circuits and connected by balanced lines. The mixer has a high output impedance. For the matching circuit, the impedance of the matching circuit at the band-pass filter side is equal to the impedance of the band-pass filter at the matching circuit side. This structure can realize an electronic tuner having low power consumption.

Abstract: 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 inductor bank is selected to filter a first band of frequencies, and a second inductor bank is selected to filter a second band of frequencies. A switch circuit couples the input signal to either the first inductor bank or the second inductor bank. The switch circuit selects the first inductor bank if the first band of frequencies is selected, and selects the second inductor bank if the second band of frequencies is selected. The switch circuit electrically isolates the switching of the input signal to the first and the second inductor banks, so as to enhance the Q factor of the LC filter. Circuit and techniques are disclosed to reduce parasitic capacitance in a capacitive bank that employs MOS transistors.

Abstract: 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 signals, eliminating a difference in NF between channels. To realize this, a UHF tuner comprises: a UHF tuning circuit which has a varactor diode first and second inductance elements serially interconnected and connected in parallel with the varactor diode, where the varactor diode 11a varies a tuning frequency within a prescribed frequency range in the UHF band; and impedance means which is serially inserted between an input terminal and the junction of the two inductance elements, where the impedance by the impedance means increases as a frequency increases within the prescribed frequency range in the UHF band.

Abstract: 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 filters and related switches.

Abstract: 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 configured in at least one capacitive (“C”) bank. The inductors are selectively enabled for the LC filter by an N code, and the capacitors are selectively enabled for the LC filter by an M code. The receiver uses a functional comparator to compare offset, capacitive, inductive and frequency values to tune the LC filter. Techniques for tuning the LC filter for operation in the VHF and UHF bands are disclosed.

Abstract: 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 potential at their source electrode regardless of the band that is selected. Besides the savings in terms of components, the invention simplifies the dimensioning of the circuit configuration. The invention can be used in all high-frequency receivers having a plurality of frequency ranges between which a changeover is performed.

Abstract: A high-frequency receiver apparatus receives a plurality of high-frequency signals having different frequencies via an input terminal, then amplifies the high-frequency signals, and then selects from among the high-frequency signals a high-frequency signal having a desired frequency by means of an input tuning circuit. A trap circuit for eliminating unnecessary signals from the plurality of high-frequency signals received is provided between the input terminal and the input tuning circuit. When high-frequency signals spreading over the VHF and UHF bands are fed to the input terminal, those of which the reception is not desired are eliminated by the trap circuit.

Abstract: A switch circuit is provided for at least one of a previous stage of a VHF-band frequency converter and a previous stage of a UHF-band frequency converter. Each switch circuit passes a signal when a frequency converter at a subsequent stage of the switch circuit is operating, and does not pass a signal when the frequency converter at the subsequent stage of the switch circuit is not operating.

Abstract: A tuning circuit, as for a television receiver or video recorder, employs switchable tuning circuits including micro-electronic electro-mechanical switches for selecting the ones of an array of capacitors and/or inductors as is useful in tunable circuits. The array of capacitors and/or inductors and micro-electro-mechanical switches of the switched tuning matrix is formed on an integrated circuit or an electronic circuit substrate along with amplifiers and other electronic elements of the tuning circuit for which the switched tuning matrix is employed. The switchable capacitance and inductance matrices are well suited for use in the resonators employed in the pre-selector filters, post-selector filters and oscillators of electronic tuners, such as those employed in television receivers and video recorders.

Abstract: Disclosed is a RF block of a mobile communication base station in which separated modules therein is implemented into one module, in which an antenna diagnosis function is performed by using a modem (control module) embedded therein, and in which implementation of a filter is simplified. The RF block of a mobile communication base station of the present invention has many advantages in that each of the separated modules therein is implemented into one module so that a degree of utility of a space is improved, and therefore, the number of components and a unit price is reduced, thereby curtailing a cost when configuring a system, in that a variable attenuator can vary an output level of the system so that a variable range thereof is wider than that implemented by a PCB circuit of a up-converter, and in that a control/alarm signal is processed by a modem so that it is easy to monitor the mobile communication base station upon operation thereof.

Abstract: A tuner, for example, for a television receiver, includes a UHF and a VHF section and a mixer oscillator stage. It is known that the VHF frequency band has to be split in at least two parts to handle the VHF signals. To that end, the mixer oscillator stage uses two separate VHF oscillators and a detector to switch tuned parts of the VHF section. In this way, the performance of the tuner is improved.

Abstract: A receiver (100) provides dual band features by providing two signal paths (106, 108) off an antenna (102), one for UHF operation (106) and one for VHF operation (108). The two signals paths (106, 108) feed into a single broadband input (124) of a direct conversion receiver (114). The UHF path (106) utilizes UHF front end circuitry (110) while the VHF path (108) is implemented with a loading/isolator circuit (120) and a matching circuit (122). The loading/isolator circuit (120) loads the antenna (102) and isolates UHF signals while the matching circuit (122) provides a match between the loading isolator circuit (120) and the direct conversion recover (114). Selectable matching circuitry (126, 128) and selectable VCO circuitry (132, 134) configures the direct conversion receiver for the UHF or VHF mode of operation.

Abstract: There is provided a television tuner including a first amplifier for amplifying received signals having frequencies of VHF-L and VHF-H bands, a first converter for converting a frequency of the received signals having been amplified by the first amplifier, a second amplifier for amplifying a received signal having a frequency of UHF band, a second converter for converting a frequency of the received signal having been amplified by the second amplifier, a signal transmitter for transmitting an operation switching signal by which the VHF-L band, the VHF-H band, or the UHF band is selected, a detector for detecting that none of the VHF-L and VHF-H bands is selected, based on data about the VHF-L and VHF-H bands, represented by the operation switching signal, and a driver for driving the second amplifier and pausing the first amplifier when the detector detects that none of the VHF-L and VHF-H bands is selected, and pausing the second amplifier and driving the first amplifier when the detector detects that one of