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7382213 |
Monolithically integrated switchable circuits with MEMS
A reconfigurable circuit and a related method for its use, the circuit including multiple microelectromechanical systems (MEMS) switches connected between selected points in the circuit. The MEMS...
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7376535 |
Wideband matching circuit and method of effectuating same
A method is provided for determining an optimal performance of a lossless circuit. In one embodiment, the number of inductors and capacitors contained in a circuit of interest are input, and then a...
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7369019 |
RF backscatter transmission with zero DC power consumption
A method for minimizing power consumption in a wireless device which utilizes backscatter transmission in half-duplex mode, wherein a switching device is interposed between an antenna and a...
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7332980 |
System and method for a digitally tunable impedance matching network
The present disclosure relates generally to digitally tunable impedance matching networks. In one example, a digitally tunable impedance matching network is configured to produce an overall...
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7280012 |
Multi-probes as single RF tuning element for RF slide-screw tuners
The present invention discloses a class of RF corrugated probes to be used in load-pull slide-screw tuner consisting of a radio-frequency (RF) or microwave slotted airline (slabline) comprising at...
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7271681 |
Clearance hole size adjustment for impedance control in multilayer electronic packaging and printed circuit boards
The present invention provides a technique for adjusting the size of clearance holes for impedance control in multilayer electronic packaging and printed circuit boards. The method comprises:...
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7253682 |
Antenna amplifier
The antenna amplifier for mobile FM radio reception includes a signal amplifier, a controllable adjusting element having a PIN diode for impedance adaptation, and a control amplifier for regulating...
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7221327 |
Tunable matching circuit
The present invention provides for low loss tunable matching circuits at rf frequencies. Ferro-electric materials are used to produce low loss tunable capacitors and inductors for use in matching...
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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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7212078 |
Method and assembly for providing impedance matching network and network assembly
An impedance matching network and network assembly employ one or more variable inductive elements, wherein one or more of the variable inductive elements includes a high temperature ferrite core, a...
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7199678 |
Impedance matching apparatus for a plasma chamber comprising two separate storage units and calculators
An impedance matching apparatus 3 calculates a forward wave voltage Vfo and a reflected wave voltage Vro at an output terminal 3 b , based on a forward wave voltage Vfi and a reflected wave...
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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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7183871 |
Bi-directional access point
An improved bi-directional access point includes an impedance boosting section in conjunction with an interface section to a bi-directional communication path. The impedance boosting section...
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7180386 |
Variable resistance circuit
A method of finding an unknown value from within a range of values is disclosed that divides the range into weighted subranges and then, beginning with an arbitrary search value within the range,...
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7176711 |
On-die termination impedance calibration device
Disclosed is an on-die termination (‘ODT’) impedance calibration device. The ODT impedance calibration device comprises: a pulse generator for outputting a calibration signal of a pulse type...
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7176709 |
Receiving device
An exemplary embodiment matches the input impedance of the receiving device to characteristic impedance, even with the receiving device composed with the MOS transistor, with a receiving device for...
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7176634 |
Coaxial type impedance matching device and impedance detecting method for plasma generation
A plasma generating method generates plasma in a treating chamber by controlling a high-frequency generating unit to generate a high-frequency signal and by feeding the high-frequency signal to the...
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7171238 |
Self-identifying antenna system
An antenna system is disclosed, to be used with a radio component particularly a wireless access point or bridge. The present system includes an antenna element for transmitting and receiving...
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7170364 |
Impedance matching circuit with automatic adjustment and method thereof
The present invention discloses an impedance matching circuit with automatic adjustment and a method thereof. The impedance matching circuit comprises: a resistor, for receiving a reference voltage...
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7161377 |
Bus type connection system in particular for backplanes
The invention relates to bus type connection systems, in particular those for wiring backplanes of electronic systems, when the bus comprises connectors distributed in an irregular manner. It...
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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...
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7135941 |
Triple probe automatic slide screw load pull tuner and method
An automatic, electromechanical microwave tuner, used for load pull transistor testing, employs three horizontally and vertically adjustable RF probes; the tuner creates very low mechanical...
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7126438 |
Circuit and method for transmitting an output signal using a microelectromechanical systems varactor and a series inductive device
A circuit and method for transmitting an output signal utilizes an inductive device connected in series with a microelectromechanical systems (MEMS) varactor to increase the potential difference...
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7119839 |
High resolution CMOS circuit using a matched impedance output transmission line
Image sensor with CMOS output, an another circuit receiving input. The circuit operates like a transmission line, in current mode, with substantially zero voltage. The impedances are matched by...
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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...
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7102457 |
Mechanically balanced microwave load pull tuner
A mechanically balanced automatic microwave tuner is used in on-wafer device testing. Using low loss rigid airlines to connect the tuner and the devices improves the tuning range at the DUT...
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7079878 |
Portable radio terminal capable of obtaining good polarization efficiency regardless of position and direction of antenna
A portable radio terminal comprises a housing, a radio circuit included in the housing, a matching circuit mounted on the top of the housing at a position which is offset from the longitudinal...
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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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7053728 |
Impedance transformation network, power amplifier and method for efficiently transmitting output signal using a series varactor device
An impedance transformation network, power amplifier and method for efficiently transmitting an output signal utilizes a series varactor device to provide a variable impedance transformation. The...
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7042311 |
RF delivery configuration in a plasma processing system
In one embodiment, a system for delivering radio frequency (RF) power to a plasma processing system includes an automatic impedance matching network configured to receive RF power from an RF...
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7034629 |
High frequency, high reflection pre-matching tuners with variable zero initialization
Automatic microwave pre-matching tuners with new zero positioning capability allowing for a minimum idle airline section between pre-matching and tuning section, thus minimizing insertion loss and...
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RE39051 |
Fuzzy logic tuning of RF matching network
A fuzzy logic control arrangement is provided for an impedance match network of the type that is typically employed between a source of RF power at a given impedance, e.g., 50 ohms, and a...
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7009463 |
Harmonic reflective load-pull tuner
The present invention discloses a harmonic reflective tuner system consisting of a radio-frequency (RF) or microwave transmission line having a longitudinal axis, containing two harmonic resonators...
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7005938 |
Software controllable termination network for high speed backplane bus
A line card provides terminating resistors for a bus or traces on a backplane. The line card terminations are activated (connected to ground) by a crossbar switch that is set according to...
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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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6995629 |
Center-tap termination circuit and printed circuit board having the same
A center-tap termination circuit which includes two resistors having the same resistance, which are serially connected between forward and return transmission lines, where the forward and return...
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6992543 |
Mems-tuned high power, high efficiency, wide bandwidth power amplifier
A circuit for matching the impedance of an output load to an active device includes a transformer including a first winding having a terminal for coupling to the output of the active device and a...
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6992538 |
Interferometric load-pull tuner
The present invention discloses an interferometric load-pull tuner system consisting of a radio-frequency (RF) or microwave transmission line containing a pair of identical RF slugs sliding on the...
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6989721 |
Adaptive controller and adaptive control method that can adaptively control a plurality of variable high frequency devices at high speed
An adaptive controller adaptively controls a plurality of variable high frequency devices. A calculation part calculates a scalar function value by using a signal varied in accordance with...
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6982610 |
Termination impedance tuning circuit
An impedance adjustment system comprising current source, a first series and a second series connected string of predetermined number of resistors, a first and second switch network, a first,...
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6980064 |
Slide-screw tuner with single corrugated slug
The present invention discloses a load-pull slide-screw tuner consisting of a radio-frequency (RF) or microwave slotted airline (slabline) containing a single corrugated RF slug, said corrugated RF...
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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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6946847 |
Impedance matching device provided with reactance-impedance table
An impedance matching device is provided, for which the electric characteristics at an output terminal are accurately analyzed. The matching device is provided with an input detector for detecting...
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6939813 |
Apparatus for improved low pressure inductively coupled high density plasma reactor
A plasma reactor comprises an electromagnetic energy source coupled to a radiator through first and second variable impedance networks. The plasma reactor includes a chamber having a dielectric...
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6925559 |
Reducing effects of transmission line reflections by changing transmission line pedestal voltage or recever threshold voltage while monitoring for irregular synchronization
A system and method of reducing an effect of signal distortion from reflection on a transmission line include changing at least one of a pedestal voltage level on the transmission line and a signal...
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6906599 |
Designing methods and circuits for impedance matching
The designing methods for an impedance matching are provided which include steps of: connecting in parallel a capacitor to a collector/drain of a bipolar/field effect transistor having a...
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6888422 |
Continuously variable filter
A continuously variable filter ( 110 ) that includes at least one filter element ( 146 ). The filter also includes a fluidic dielectric ( 108 ) having a permittivity and a permeability, a...
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6873114 |
Method for toolmatching and troubleshooting a plasma processing system
A method tests a plasma processing system having a chamber, an RF power source, and a matching network. An RF power signal is generated from the RF power source to the chamber without igniting any...
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6862714 |
Accurately tuning resistors
Resistors may be more accurately tuned by using an external resistor and comparing the value of an internal resistor to the value of the external resistor. The value of the internal resistor may be...
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6828820 |
Method and circuit for producing control signal for impedance matching
A method for producing a stable control signal for impedance matching is provided which is capable of suppressing variation in impedance matching data by adding a shift voltage to a voltage to be...
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