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7573839 |
Line driver for an adaptive hybrid circuit
A second output transmission signal (“TX 2 ”) added to a line driver is a scaled version of the main output transmission signal (“TX 1 ”). TX 2 is scaled from TX 1 by a variable scale...
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7536155 |
Wireless communication device interconnectivity
A wireless communication device that is attached or included in an electronic object, such as a portable computer, having its own separate communication system. The separate communication system...
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7492239 |
Radio frequency combiner
An electronic circuit, an RF signal power amplifier circuit, and an integrated circuit provide for combining two radio frequency signals. These circuits include, among other things, capacitors (...
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7461188 |
Capacitive multidrop bus compensation
The signal integrity of a high speed heavily loaded multidrop memory bus is often degraded due the numerous impedance mismatches. The impedance mismatches causes the bus to exhibit a nonlinear...
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7456704 |
2D transmission line-based apparatus and method
A power combiner comprising an LC lattice structure is shown, together with a method for generating a planar wave front. The LC structure can comprise constant or voltage dependent capacitors....
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7395028 |
Switching apparatus and satellite antenna switching apparatus
A satellite antenna switching apparatus has LNB ports to which LNBs are connected, receiver ports to which receivers that exchange signals with the LNBs are connected, cascade ports to which...
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7388452 |
Integrated branching network system and joint connector
A network system is provided with a joint connector for branching a communication line to plural lines respectively linked with plural nodes, the joint connector is provided with terminals for...
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7286026 |
Serial signal injection using capacitive and transformer couplings for power line communications
A coupling network has a first power line interface port and a power line modem interface configured to be coupled to a power line modem transceiver. An inductor-capacitor circuit coupled to the...
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7224180 |
Methods and systems for rise-time improvements in differential signal outputs
A method for maintaining signal integrity of a differential output signal generated from a differential driver is disclosed. The method includes receiving the differential output signal from the...
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7218185 |
Impedance circuit, and filter circuit, amplifier circuit, semiconductor integrated circuit, electronic component, and wireless communications device using the same
A filter circuit is provided wherein one end of an inductor is connected to one end of a capacitor to form a signal input end. The other end of the inductor is connected to a first switch circuit,...
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7215762 |
Method of selecting impedance setting for loop start trunk line
A method of selecting an optimum impedance for a loop start trunk line, comprising successively applying respective ones of a plurality of impedance settings to the loop start trunk line, for each...
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7212789 |
Tunable duplexer
The method and apparatus herein identifies tunable duplexer in a communication system. The tunable duplexer includes a tunable receiver filter, a tunable transmitter filter, a variable receiver...
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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....
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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...
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7138886 |
Wideband CATV signal splitter device
A wideband high frequency signal splitter device utilized in a signal distribution network is disclosed. An input signal having a substantially extended frequency bandwidth is applied to an input...
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7123884 |
RF switch
A radio frequency (RF) switch which is used in an RF unit of a communication apparatus and which has less of an insertion loss during a transmission. A strip line disposed in the RF switch is...
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7113759 |
Controller area network transceiver having capacitive balancing circuit for improved receiver common-mode rejection
A controller area network transceiver and a transmission method for a controller area network provides improved symmetry between its differential output signal CANH and CANL such that capacitive...
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7091849 |
Inbound interference reduction in a broadband powerline system
Disclosed is a method and apparatus for reducing inbound interference in a broadband powerline communication system. Data modulated on first and second carrier frequencies is received via...
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7091872 |
Controlled power source for underground line location
A transmitter for a line locator system that controls the electrical current, voltage or power applied to the target line is disclosed. Control of the electrical output of the transmitter can be...
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7089032 |
Radio transmitting/receiving device
A radio transmitting/receiving device having at least three modules. The first module includes a first function for amplifying a radio frequency signal, demodulating the amplified radio frequency...
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7080186 |
Electromagnetically-coupled bus system
The present invention provides a mechanism for supporting high digital bandwidth in a multi-drop bus system. A first device of the system is electrically coupled to a bus. Multiple receiving...
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7071792 |
Method and apparatus for impedance matching in an amplifier using lumped and distributed inductance
An impedance matching circuit ( 140 ) includes a capacitive element (C 1 , 220 ), having a capacitance C, coupled in parallel with an output node ( 215 ) of the matching circuit, and an inductor (L...
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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...
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7049906 |
Quad band antenna interface modules including matching network ports
Quad band antenna interface modules include a diplexer that is configured to connect to an antenna port, a switching core that is connected to the diplexer, and filters that are connected to the...
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7035611 |
Apparatus and method for front-end circuitry in radio-frequency apparatus
A radio-frequency (RF) apparatus includes front-end circuitry. The front-end circuitry includes a filter circuitry and an impedance matching circuitry. The filter circuitry has a differential...
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7030714 |
Method and apparatus to match output impedance of combined outphasing power amplifiers
Briefly, an apparatus having a first capacitor-inductor-capacitor impedance converter operably coupled to a second capacitor-inductor-capacitor impedance converter. The first and second...
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6998915 |
Apparatus for switching matching circuit in mobile communication terminal
An apparatus for switching a matching circuit in a mobile communication terminal includes a PIN diode connected in parallel to an RF signal input and output line to be turned on and off to connect...
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6987430 |
Power line communication system and power line branching apparatus
A power line communication system comprises an indoor power line and one or more power line branching apparatuses connected to the indoor power line. The power line branching apparatus comprises a...
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6985760 |
Foldable portable radio terminal
A foldable portable radio terminal is disclosed which normally optimizes an antenna characteristic by an antenna matching circuit even if the body length of the foldable portable radio terminal...
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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...
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6949986 |
Semiconductor device unlikely to make incorrect determination of fuse blow
By switching a mode signal, capability of a drive circuit in a latch circuit can be improved than in a normal mode. Accordingly, even if a small leakage occurs in a blown portion of a fuse element,...
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6943289 |
Slotted planar power conductor
A planar conductor has a first port and a plurality of second ports. A conductive planar region is electrically coupled between the first port and the plurality of second ports. The planar region...
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6943643 |
Controllable two-phase network with amplitude compensation
A controllable two-phase network for production of two output signals at two loads with identical load impedances from an input signal from a source containing a phase path for production of a...
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6937111 |
Device and system having self-terminated driver and active terminator for high speed interface
A transmission line adapter for high speed interface. A receiver receives input signals via a transmission line. An active termination circuit is selectively connected to the transmission line in...
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6930564 |
Providing controllable impedance at a reference plane in a circuit
Apparatus for providing a controllable impedance at a reference plane in a circuit comprises a unidirectional transmission line loop having first and second input/output terminals. The first...
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6812806 |
High power switchable power combiner
A high power switchable power combiner includes a plurality of input ports and a plurality of matching elements. The matching elements are arranged to be used in combination when more than two of...
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6806790 |
Miniature 180 degree power splitter
A power splitter that has a small package size and repeatable electrical characteristics. The power splitter includes a low temperature co-fired ceramic (LTTC) substrate with several layers....
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6737932 |
Broadband impedance transformers
The invention concerns an impedance transforming device that includes a dielectric circuit board substrate. The substrate has at least one region that has a relative permeability or a relative...
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6738603 |
Radio communication apparatus with retractable antenna and its impedance matching method
A radio communication apparatus is provided, which realizes a desired impedance matching state between a retractable antenna and a circuit connected thereto in both a situation where the antenna...
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6711385 |
Coupler for wireless communications
An apparatus for communication of electric or electromagnetic signals over air includes a transmitter or receiver and a coupler. The coupler has a capacitive circuit connected with an air-core or...
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6680623 |
Information processing apparatus having a reduced signal distortion between a module and a memory
In an information processing apparatus, a transmission distortion of a signal transmitted between a module and a controller is reduced. A plurality of modules and a controller controlling the...
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6679728 |
Mini BNC connector
A mini BNC connector, which provides a better signal transmission quality and can be fabricated conveniently, includes a metal outer casing with two locating cylinders and a joining chamber...
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6664935 |
Broad band impedance matching device with coupled transmission lines
A broadband impedance matching integrated circuit apparatus comprising an alternating current ground plane, a direct current ground plane positioned proximate to the alternating current ground...
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6657394 |
Reflection coefficient phase detector
A phase detector which determines the phase based upon the output signals from a power coupler. The power coupler outputs a first signal and a second signal. The first and second signals are input...
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6657324 |
Micromachine switch and method of manufacture thereof
A micromachine switch for use in a millimeter wave circuit and a microwave circuit is simpler in structure than conventional micromachine switches. The micromachine switch has first and second...
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6650200 |
Dynamic combiner/splitter for RF signal systems
A circuit for dynamically combining/splitting power amplifier outputs having at least four power input ports. The input ports are joined by a 360 degree transmission line having three switches...
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6642810 |
Waveguide apparatus
A waveguide apparatus for bidirectional distribution of signals includes: (a) a first conductive element parallel with a reference plane; (b) a second conductive element in spaced parallel relation...
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6625682 |
Electromagnetically-coupled bus system
The present invention provides a mechanism for supporting high digital bandwidth in a multi-drop bus system. A first device of the system is electrically coupled to a bus. Multiple receiving...
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6621374 |
Splitter/combiner using artificial transmission lines, and paralleled amplifier using same
A power splitter/divider may be used with a paralleled amplifier. The power splitter/divider includes a common port and a distribution structure for distributing equal-amplitude samples of the...
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6578202 |
Signal splitter for cable TV
A standard, high performance CATV signal splitter that operates at high signal levels with greatly reduced intermodulation distortion. The circuit retains the presently accepted performance...
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