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...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 8190109 | Dynamic real-time calibration for antenna matching in a radio frequency transmitter system Real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency transmitter system. The radio frequency transmitter system includes two non-linear equations that may be solved to determine the reflection coef... | 05/29/2012 |
| 7502598 | Transmitting arrangement, receiving arrangement, transceiver and method for operation of a transmitting arrangement In a transmitting arrangement a power amplifier is coupled to a radio-frequency antenna arrangement via a controllable matching apparatus. This allows direct impedance transformation of the output of the power amplifier to the input of the radio-frequency antenna ar... | 03/10/2009 |
| 7444122 | Communications system with variable load and related method A mobile system has a frequency synthesizer and an amplifier module coupled to the frequency synthesizer. The frequency synthesizer is controlled by frequency division data to generate a tuning signal with a frequency corresponding to a reference signal and the freq... | 10/28/2008 |
| 7426373 | Electrically tuned resonance circuit using piezo and magnetostrictive materials An impedance tuning system, especially for a cellular telephone system. The system can be used to match the impedance of an antenna element with that of an output stage of a transmitter driving the antenna element. The system includes a piezo capacitor in parallel w... | 09/16/2008 |
| 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 |
| 7356360 | Radio communication system The present invention provides a radio communication system in which not only a communication unit operating in a slave mode but also a communication unit operating in a master mode can be changed into a power saving mode. Among a plurality of communication u... | 04/08/2008 |
| 7292835 | Wireless and wired cable modem applications of universal frequency translation technology Frequency translation and applications of same are described herein, including cable modem applications. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and fil... | 11/06/2007 |
| 7257583 | System and method for updating an on-device application catalog in a mobile device receiving a push message from a catalog server indicating availability of an application for download Embodiments of the present invention relate to methods, systems, and computer-readable media for providing software applications to a mobile device. A server receives a request for an application identified in an application catalog stored on the server. A push mess... | 08/14/2007 |
| 7245886 | Method and system for frequency up-conversion with modulation embodiments A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In ... | 07/17/2007 |
| 7206553 | Method and apparatus for impedance matching in an amplifier using lumped and distributed inductance An impedance matching circuit (140) includes a capacitive element (C1, 220), having a capacitance C, coupled in parallel with an output node (215) of the matching circuit, and an inductor (L1, 225) coupled in series ... | 04/17/2007 |
| 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 |
| 7181094 | Apparatus for controlling acousto-optic tunable filter and method of selecting wavelength A radio-frequency-signal generator generates an RF signal. An optical monitor monitors a first intensity of a reference signal and a second intensity of a drop signal. A reference-frequency determining unit determines, based on the first intensity, a first frequency... | 02/20/2007 |
| 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 |
| 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 |
| 7079819 | RF transmitters with saturation detection and correction and methods therefor Methods in radio communications devices having a transmitter with an integral control loop, and in other integral control systems, including generating a first error signal (210) based upon an amplifier output signal and a corrected reference signal, generati... | 07/18/2006 |
| 7069048 | Base station system supporting multi-sector/multi-frequency assignment for seamless call service A base station system supporting multi-sector/multi-FA in which, when a board goes out of order, a redundant board is automatically switched on, so as to prevent the call from being cut off and the entire capacity of the system from being influenced, thereby enablin... | 06/27/2006 |
| 7068983 | Method for detecting quadrature modulator carrier leak adjusting point by geometrical analysis/calculation method, carrier leak adjusting method, and quadrature modulation apparatus The first, second, and third pairs of DC voltages which set a modulated signal to a predetermined reference level while the levels of I and Q signals supplied to a quadrature modulator are set at “0” are sequentially obtained. On the basis of the first, second, ... | 06/27/2006 |
| 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 |
| 7006837 | Electronic apparatus An electronic (or computer) apparatus (10) has a current position data output unit (13) and an area data output unit (14) responsive to current position data from the current position data output unit for producing specific country data represen... | 02/28/2006 |
| 6987966 | Adaptive radio transceiver with polyphase calibration An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ... | 01/17/2006 |
| 6980782 | Antenna device and method for transmitting and receiving radio waves An antenna device for transmitting and receiving radio frequency waves, installable in a communication device includes an antenna structure switchable between antenna configuration states. Each state is distinguished by a set of radiation parameters, such as resonan... | 12/27/2005 |
| 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 |
| 6920315 | Multiple antenna impedance optimization A multiple antenna mobile communication device, such as a cellular telephone, having multiple radios and multiple antennas located in close proximity to each other uses a parallel tuning circuit to optimize the isolation between the antennas. The parallel tuning cir... | 07/19/2005 |
| 6847807 | Transmission circuit and radio transmission apparatus A modulator receives an I-phase transmission data signal and a Q-phase transmission data signal, which have been spread-spectrum processed, and modulates an intermediate frequency signal in accordance with the data signals, an IF-AGC amplifier amplifies the output o... | 01/25/2005 |
| 6570462 | Adaptive tuning device and method utilizing a surface acoustic wave device for tuning a wireless communication device An adaptive tuning method for a wireless communication device determines the impedance of a matching circuit relative to an impedance to be matched and adjusts the impedance of the matching circuit accordingly. A passive surface acoustic wave (SAW) device... | 05/27/2003 |
| 6421533 | Method and apparatus for controlling the envelope of a radio signal A method of controlling the envelope of a radio signal to be transmitted from a station for mobile radio communications, said radio signal being output by a field effect power amplifier. The method of the invention comprises the following steps: tapping a... | 07/16/2002 |
| 6414562 | Circuit and method for impedance matching An impedance matching circuit (10) matches the impedance of a load (19) coupled to an RF amplifier (12) to that of the RF amplifier (12). The impedance matching circuit (10) samples a transmitted signal from the RF amplifier (12) and a reflected signal fr... | 07/02/2002 |
| 6385439 | Linear RF power amplifier with optically activated switches A linear power amplifier amplifies a linear baseband signal having I and Q components. An up-converting mixer uses optically activated switches to mix the amplified baseband signal with a local oscillator signal at specified carrier frequency. The optical... | 05/07/2002 |
| 6333927 | Data transmission method between a base station controller and a base transceiver station in a digital mobile communication system The present invention relates to a data transmission method between a base station controller (BSC) and a base transceiver station (BTS) in a digital mobile communication system, for varying a length of a frame according to a data transmission rate, thus ... | 12/25/2001 |
| 6246727 | Method and system for tuning resonance modules A method and a system for tuning a resonance module in e.g. a radio base station are disclosed. The resonance module has tuning means, a transmitter connection, and an antenna connection. First frequency input and output signals on the transmitter and ant... | 06/12/2001 |
| 6160460 | Self-tuning resonant cavity filter In one form of the invention, a resonant cavity filter (50) is disclosed, comprising an input port (210) for receiving an input signal, a dielectric resonator (204) in a cavity, the dielectric resonator operable to receive an input signal from the input p... | 12/12/2000 |
| 6072993 | Portable radio transceiver with diplexer-switch circuit for dual frequency band operation A portable radio transceiver selectively transmits and/or receives RF signals in two frequency bands and in two modes of operation. The radio transceiver selectively switches between two antennas for operating in either of the two modes, such as a handhel... | 06/06/2000 |
| 6058294 | Adjustable frequency stabilizing internal chip capacitor system A transmitter system having an adjustable monolithic frequency stabilization and tuning internal capacitor circuit. The transmitter system has a transmitter for generating and transmitting a transmitter oscillator frequency signal. A data generating chip ... | 05/02/2000 |
| 5983085 | Method and apparatus that compensates for output power variations in a transmitter by using scaling factors to scale the baseband input signal In a base transceiver station in a cellular network, a digital signal processor generates a baseband input signal, which is converted to analog and transmitted by a transmitter at radio frequency. In accordance with the present invention, the baseband inp... | 11/09/1999 |
| 5757247 | Device and method for tuning a band-pass filter utilizing mixing results with DC component removed A device and a method for adjusting a bandpass filter, especially a combiner filter. The method includes deriving an RF sample signal proportional to the power of a modulated RF signal which is one of: passing forward to the bandpass filter, reflected fro... | 05/26/1998 |
| 5589844 | Automatic antenna tuner for low-cost mobile radio An automatic antenna tuner which conjugately matches the impedance of an electrically small antenna to the impedance of a transmit amplifier output stage by using a pi-type impedance matching network with adjustable capacitive circuit components which are... | 12/31/1996 |
| 5564086 | Method and apparatus for enhancing an operating characteristic of a radio transmitter In a radio transmitter (100) that includes a power amplifier (104) and an antenna (106), a method for enhancing an operating characteristic of the radio transmitter (100) can be accomplished in the following manner. The power amplifier (104) provides a si... | 10/08/1996 |
| 5491715 | Automatic antenna tuning method and circuit A method of matching the resonant frequency of an antenna resonant circuit (18, 46) to the output frequency of a transmitter output stage (26), the method includes the step of providing a powering signal from the transmitter output stage (26) to the anten... | 02/13/1996 |
| 5469180 | Method and apparatus for tuning a loop antenna A method and apparatus for rapidly determining the resonance of a loop antenna (7). In order to set the loop antenna (7) to the desired operating frequency, the antenna is used with an amplifier (15). In view of the high Q provided by the loop, it is used... | 11/21/1995 |
| 5459440 | Automatic impedance matching with potential monitoring means A method and apparatus for impedance matching a transmitter to a transmission medium of a communication system during normal operation of the system. The method comprises feeding signals from the transmitter to the transmission medium through a variable i... | 10/17/1995 |
