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| Number | Title | Issue Date |
| 8121561 | Power tuning system and method for power amplifier An automatic power tuning system and method, and a transmitter employing either the system or the method. In one embodiment, the system includes: (1) a power detector circuit coupled to an output of a transmitter, the transmitter having an integrator with a first, r... | 02/21/2012 |
| 7899417 | Method and apparatus for increasing the efficiency of low power amplifiers The present invention is directed to a method for reducing the current consumption and increasing the efficiency of an RF power amplifier (PA), while maintaining the output power. The desired output power of the PA is determined and for each level of the desired out... | 03/01/2011 |
| 7865154 | Tunable microwave devices with auto-adjusting matching circuit An embodiment of the present invention provides an apparatus, comprising an input port and a dynamic impedance matching network capable of determining a mismatch at the input port and dynamically changing the RF match by using at least one matching element that incl... | 01/04/2011 |
| 7840196 | Filter circuit and radio communication system comprising filter In a filter circuit, resonators is connected in parallel between input and output terminal, an input signal is input through the input terminal and supplied to the resonators. Signal generators are connected to the resonators to control the resonators. The signal ge... | 11/23/2010 |
| 7437139 | Method and apparatus for calibrating filtering of a transceiver A method and apparatus of calibrating filtering of receive and transmit signals is disclosed. The method of calibrating filtering of a received signal includes injecting an LO signal. The injected LO signal is filtered by a tunable filter. The filtered signal is fre... | 10/14/2008 |
| 7409196 | RFIC transmit power control An RFIC transmitter includes a digital transmit processing module, a digital to analog converter, a filter and gain module, an up-conversion module, a power amplifier, and a transmit signal strength module. The transmit signal strength module is coupled to generate ... | 08/05/2008 |
| 7394880 | Method and apparatus for simulating radio channel A radio channel simulator configured to read radio channel data describing a radio channel and user data including at least one user signal, and to simulate the radio channel using a FIR filter comprising one or more FIR blocks for filtering the user data read based... | 07/01/2008 |
| 7379715 | Transmitter apparatus and method using polar modulation with signal timing adjustment A transmitting apparatus includes a polar signal producing circuit which produces signals corresponding to the amplitude and the phase of a transmitting modulated wave from an input signal and multiplies the amplitude signal by the phase signal by a multiplying circ... | 05/27/2008 |
| 7379714 | Method and apparatus for dynamically adjusting a transmitter's impedance A method and apparatus for dynamically adjusting the impedance between a transmitter's power amplifier (PA) and antenna to efficiently transfer power from the PA to the antenna. The impedance between the PA and the antenna is adjusted based on power level measuremen... | 05/27/2008 |
| 7362821 | Method and apparatus for amplifier linearization using adaptive predistortion A distortion correction circuit comprises memory that stores N samples of an input signal that occur at N different times, where N is an integer greater than two. A self-receiver samples an output signal that is generated by an RF power amplifier and that is based o... | 04/22/2008 |
| 7333565 | Semiconductor integrated circuit for communication An orthogonal modulating circuit for modulating signals of two oscillation frequencies differing in phase by 90° with transmission data (I and Q) is used in common for a plurality of bands, an LC resonance circuit comprising inductances L and a capacitor C is used ... | 02/19/2008 |
| 7317364 | Varactor tuning for a narrow band filter including an automatically controlled tuning system A method and apparatus for providing dynamic and remote tuning of a cryo-cooled bandpass filter is disclosed. The device includes resonator element and a voltage sensitive element as part of the capacitance in a narrow band filter circuit. A varactor such as a GaAs ... | 01/08/2008 |
| 7280612 | Digital branch calibrator for an RF transmitter The present invention provides a digital (computational) branch calibrator which uses a feedback signal sensed from an RF transmit signal path following the combining stage of LINC circuitry of a transmitter to compensate for gain and phase imbalances occurring betw... | 10/09/2007 |
| 7263338 | Device and method for regulating a transmission moment of a continuous transmission signal A comparator unit is used to compare an actual transmission time signal with a nominal transmission time signal and to produce a difference signal from the discrepancy, from which difference signal a correction signal is produced in a control unit. This correction s... | 08/28/2007 |
| 7245180 | Intelligent RF power control for wireless modem devices A bypass circuit is disclosed for use with lower power supply voltage PC cards. The bypass circuit controls the power supply voltage fed to a power amplifier when switching between a lower power 8-PSK modulation mode and a higher power GMSK modulation mode. A step-u... | 07/17/2007 |
| 7242930 | System and method for increasing transmission capability A system for transmitting signals in a multi-sector wireless communications system. The system includes a first signal source associated with a first sector for generating a first signal, a first Auto Tune Combiner for processing the first signal, a second signal so... | 07/10/2007 |
| 7203185 | Method and apparatus for providing bifurcated transport of signaling and informational voice traffic A method and apparatus for providing bifurcated voice and signaling traffic over a cable telephony architecture by segregating signaling traffic and voice traffic and transmitting the respective traffic over two different mediums to a controller to establish a phone... | 04/10/2007 |
| 7190933 | Method and apparatus for automatic tuning of a resonant loop antenna in a transceiver circuit Disclosed is a circuit and method for automatic tuning of a resonant circuit in a transceiver having a receiver and a transmitter that includes a power amplifier for driving the resonant circuit. During a transmit mode of the transceiver, a resonance voltage of the ... | 03/13/2007 |
| 7184720 | Method and device for simulating radio channel The invention relates to a method and device for performing channel simulation, the device comprising a set of channel simulation units (200 to 214) for simulating a radio channel, each unit comprising radio frequency parts (200A to 214A)... | 02/27/2007 |
| 7174147 | Bandpass filter with tunable resonator A tunable bandpass filter is provided that comprises a first shunt-connected ferroelectric (FE) tunable tank circuit having a first node to accept an input signal. A second shunt-connected FE tunable tank circuit has a second node to supply a bandpass filtered signa... | 02/06/2007 |
| 7171168 | Ramp signal with boost portion preceding a time slot A transmitter includes a power amplifier which is capable of both linear and non-linear operation, controlled by first and second control loops. A power controller includes a capacitive component, and controls the gain of the power amplifier. A ramp generation circu... | 01/30/2007 |
| 7145143 | Tunable sensor A tunable bolometer device for detecting infrared light (IR) from a target at specific frequencies and in a broadband mode. The device may have an array of pixels of which each is controllable to be sensitive to a particular wavelength of light that is selected and ... | 12/05/2006 |
| 7145413 | Programmable impedance matching circuit and method As disclosed herein, a microelectronic circuit and method are provided for improving signal integrity at a transmission line. The circuit includes a programmably adjustable impedance matching circuit which is coupled to a transmission line which includes a programma... | 12/05/2006 |
| 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 |
| 7116950 | Direct-conversion transmitting circuit and integrated transmitting/receiving circuit A transmitter is provided which includes a transmitting circuit that does not require a high-performance low noise VCO restricting cost reduction thereof and that can reduce the number of parts without requiring an RF filter. A direct conversion that does not requir... | 10/03/2006 |
| 7110727 | Methods for determining the gains of different carriers, radio transmission units and modules for such units The invention relates to methods for determining the separate radio frequency gains for carriers in a multi-carrier transmitter of a radio transmission unit of a radio communications system. In order to enable a simple and accurate estimation of the gains, it is pro... | 09/19/2006 |
| 7107026 | Automatic matching and tuning unit An automatic matching and tuning unit (AMTU), which connects the output from a low or medium frequency, high power radio transmitter, which requires a 50 ohm terminating impedance, to an antenna with an input impedance comprising low resistance in series with a high... | 09/12/2006 |
| 7107027 | Distributed transmitter automatic gain control Automatic gain control (AGC) functionality is distributed within a transmitter chain. A controller manages two or more variable gain amplifiers to achieve the desired result. ... | 09/12/2006 |
| 7092685 | Method for tuning a radio filter and a system for tuning a radio filter The present invention relates to a method and a system for tuning a radio filter. The radio filter comprises at least one resonator module, each of said at least one resonator module having a tuning mechanism, a filter input connection, a filter output connection. H... | 08/15/2006 |
| 7058372 | Method and apparatus for automatic tuning of a resonant loop antenna Disclosed is a circuit and method for continuous automatic tuning of a resonant circuit. A resonance voltage of the resonant circuit is phase shifted by a predetermined phase shift Φ degrees and an input voltage signal to a power amplifier driving the resonant circ... | 06/06/2006 |
| 7058412 | Combined advertising and entertainment system network A wireless remote unit is operable to demodulate signals received over a plurality of different bands, such as the FM broadcast band, and one or more higher frequency bands. The various bands have different channels and the selection of the band and the channel is a... | 06/06/2006 |
| 7039385 | Method and apparatus for automatic center frequency tuning of tunable bandpass filters A radio has a tunable bandpass filter that is tuned by apparatus within the radio. A reference generator generates a reference signal for use in tuning the tunable bandpass filter. The tunable bandpass filter receives the reference signal and provides a filter outpu... | 05/02/2006 |
| 7023293 | Method for tuning a radio filter, a radio filter and a system comprising such a radio filter The present invention relates to a method for tuning a radio filter. The filter comprises an input connection, an output connection and at least two resonator modules coupled in cascade, each having a tuning mechanism and a probe. A first resonator module is connect... | 04/04/2006 |
| 7005941 | High-frequency coupler A high-frequency coupler for extracting a secondary signal representative of a main signal carried by a conductive line, including two series-coupled, respectively high-pass and low-pass, filters, and the input of which is intended to be connected to said line while... | 02/28/2006 |
| 6987427 | Method for tuning a radio filter, a radio filter and a system comprising such a radio filter The present invention relates to a method for tuning a radio filter. The filter comprises an input connection, an output connection and at least two resonator modules coupled in cascade, each having a running mechanism and a probe. A first resonator module is connec... | 01/17/2006 |
| 6980776 | Transceiver apparatus The present invention provides a transceiver apparatus that permits miniaturization even when the antenna thereof is an unbalanced circuit and the transmitter circuit section and receiver circuit section thereof are balanced circuits. The transceiver apparatu... | 12/27/2005 |
| 6952565 | Communication terminal, automobile communication terminal, and automobile The present invention provides a communication terminal that enables precise communications with optimum receive sensitivity at any time regardless of any change in peripheral environments of an antenna thereof. The communication terminal including means for transmi... | 10/04/2005 |
| 6946884 | Fractional-N baseband frequency synthesizer in bluetooth applications A baseband clock synthesizer having particular use in a BLUETOOTH piconet device, having the capability of generating either 12 MHz or 13 MHz clock signals generated from any reference clock signal, e.g., 12.00, 12.80, 13.00, 15.36, 16.80, 19.20, 19.44, 19.68, 19.80... | 09/20/2005 |
| 6941124 | Method of speeding power-up of an amplifier, and amplifier An amplifier powered by a selectively engageable voltage source and a method for operating the amplifier. The amplifier includes first and second electrodes for receiving an input signal to be amplified. The first and second electrodes are adapted to be respectively... | 09/06/2005 |
| 6906684 | Controlling a telescopic antenna mast A receiver receives an electromagnetic signal via an antenna mounted on an antenna mast. A signal evaluator determines or measures a signal quality level associated with the received electromagnetic signal. The signal quality compares the determined signal quality l... | 06/14/2005 |
