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7400489 System and a method of driving a parallel-plate variable micro-electromechanical capacitor  
A method of driving a parallel-plate variable micro-electromechanical capacitor includes establishing a first charge differential across first and second conductive plates of a variable capacitor...
7346981 Method for fabricating microelectromechanical system (MEMS) devices  
A process for fabricating a MEMS device comprises the steps of depositing and patterning on one side of a wafer a layer of material having a preselected electrical resistivity; bonding a substrate...
7277267 Multi-layer capacitive transducer  
A capacitive transducer of multi-layer construction includes two rotor plates supported by flexible springs, the plates being spaced apart and rigidly connected by a stem. One rotor plate my be...
7274277 Ferroelectric devices and method relating thereto  
The present invention relates to an electrically controllable/tunable microwave device comprising a ferroelectric substrate with a variable dielectric permitivity and conducting electrodes,...
7092232 Variable capacitance capacitor, circuit module, and communications apparatus  
A variable capacitance capacitor has a plurality of variable capacitance elements, using a thin-film dielectric layer whose dielectric constant varies with voltage application, connected in series...
7032448 Capacitive humidity sensor  
A capacitive humidity sensor includes a detection portion and a reference portion. The detection portion includes detection electrodes and a moisture sensitive film. The reference portion includes...
7031137 Variable micro-capacitor with a high ratio and a low operating voltage  
A MEMS micro-capacitor having a variable capacity is disclosed. The MEMS micro-capacitor has at least one fixed electrode ( 3 ) positioned on one surface of a substrate ( 1 ); bending means with...
7031136 Variable capacitors, composite materials  
Tunable capacitors ( 10, 20, 30, 40 ) have a dielectric material ( 16, 26, 36, 42 ) between electrodes, which dielectric material comprises an insulating material ( 17, 27, 37, 42 ) and...
7030463 Tuneable electromagnetic bandgap structures based on high resistivity silicon substrates  
Electrically tunable electromagnetic bandgap (“TEBG”) structures using a ferroelectric thin film on a semiconductor substrate, tunable devices that include such a TEBG structure, such as a...
7027284 Variable capacitance element  
A variable capacitance element includes a coplanar line or signal conduction and a movable body, which are vertically displaced through a supporting bar and which are provided on a substrate. A...
7006342 Variable capacitor having a rigidity-increasing feature  
A variable capacitor. The variable capacitor has a movable capacitor electrode including a major surface and a fixed capacitor electrode including a major surface. The major surface of the fixed...
6975498 Variable capacitor  
A variable capacitor includes a stator and a rotor rotatably supported by a cover relative to the stator. The stator includes a first stator electrode of two or more layers and a second stator...
6952337 Variable capacitor  
A variable capacitor is provided such that it is possible to make nonlinear distortion small and use at high power handling capability, and such that a variable rate of capacitance is not...
6944008 Charge dissipation in electrostatically driven devices  
A charge-dissipation structure is formed within the dielectric of an electrostatically driven device, such as a micro-electro-mechanical systems (“MEMS”) device, by ion implantation. Electrical...
6937456 Direct digitally tunable microwave oscillators and filters  
A tunable element in the microwave frequency range is described that may include one or more tunable elements that are directly digitally controlled by a digital bus connecting a digital control...
6920311 Adaptive radio transceiver with floating MOSFET capacitors  
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...
6909589 MEMS-based variable capacitor  
A variable capacitor device using MEMS or micromachining techniques wherein thin-films of materials are deposited, patterned and etched to form movable micromechanical elements on the surface of a...
6853476 Charge control circuit for a micro-electromechanical device  
A charge control circuit for controlling a micro-electromechanical device having a variable capacitance is disclosed. In one embodiment, a charge storage device is configured to store a charge...
6833985 Variable capacitance element  
A variable capacitance element includes a coplanar line or signal conduction and a movable body, which are vertically displaced through a supporting bar and which are provided on a substrate. A...
6738601 Adaptive radio transceiver with floating MOSFET capacitors  
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...
6735073 Electronic devices based on density wave dielectrics  
A capacitor includes first and second electrodes and a quasi 1D dielectric material disposed between the electrodes. The dielectric material has a charge or spin density wave state.
6701779 Perpendicular torsion micro-electromechanical switch  
A semiconductor torsional micro-electromechanical (MEM) switch is described having a conductive movable control electrode; an insulated semiconductor torsion beam attached to the movable control...
6690569 Capacitive sensor  
A sensor, in particular a humidity sensor, comprises a measuring layer ( 4 ), the dielectric properties of which depend on a parameter to be measured, e.g. of the humidity of the environmental air....
6646525 Microelectro-mechanical system actuator device and reconfigurable circuits utilizing same  
A microelectro-mechanical device which includes a fixed electrode formed on a substrate, the fixed electrode including a transparent, high resistance layer, and a moveable electrode formed with an...
6625004 Electrostatic actuators with intrinsic stress gradient  
An electrostatic actuator with an intrinsic stress gradient is provided. The electrostatic actuator comprises an electrode and an electrostatically actuated beam fixed at one end relative to the...
6621392 Micro electromechanical switch having self-aligned spacers  
A method of fabricating and the structure of a micro-electromechanical switch (MEMS) device provided with self-aligned spacers or bumps is described. The spacers are designed to have an optimum...
6549394 Micromachined parallel-plate variable capacitor with plate suspension  
A capacitor having a bottom plate, a top plate and a support connected to the center portion of the top plate for positioning the top plate over the bottom plate and separated therefrom by a gap....
6542350 Reservoir volume sensors  
Reservoir volume in a drug delivery device is sensed by providing a capacitor, the capacitance of which varies with bellows position or, alternatively, with the amount of propellant liquid absorbed...
6507475 Capacitive device and method of manufacture  
A capacitive device includes a substrate ( 110 ), a first electrode ( 130, 140, 1220 ) located over the substrate and a second electrode ( 170, 1070, 1071, 1250 ) located over the first electrode,...
6442013 Apparatus having capacitive sensor  
An electronic device ( 1 ), e.g. a mobile telephone having a front cover ( 6 ) and a capacitive proximity sensor, comprising: a first electrode ( 9; 27 ) and a second electrode ( 8; 21, 20 ), said...
6441449 MEMS variable capacitor with stabilized electrostatic drive and method therefor  
A micro electro-mechanical systems device having variable capacitance is controllable over the full dynamic range and not subject to the “snap effect” common in the prior art. The device...
6433375 Tunable microwave devices  
An electrically tunable device, particularly for microwaves, includes a carrier substrate, conductors, and at least one tunable ferroelectric layer. Between the conductors and the tunable...
6404614 Voltage tuned dielectric varactors with bottom electrodes  
A voltage tunable dielectric varactor includes a substrate having a first dielectric constant and having generally a planar surface, first and second electrodes positioned on the generally planar...
6373682 Electrostatically controlled variable capacitor  
A MEMS (Micro Electro Mechanical System) electrostatically operated high voltage variable controlled capacitor device is provided. This device can store high energy over a wide range while using...
6370008 Capacitor film for a self-healing film capacitor  
The invention relates to a metallization for a film capacitor, wherein a dielectric capacitor film provided with a metallic coating is wound into a capacitor element in the running direction of the...
6215644 High frequency tunable capacitors  
A tunable capacitor having low loss and a corresponding high Q is provided. The tunable capacitor includes first and second substrates having first and second capacitor plates disposed,...
6127908 Microelectro-mechanical system actuator device and reconfigurable circuits utilizing same  
A microelectro-mechanical device which includes a fixed electrode formed on a substrate, the fixed electrode including a transparent, high resistance layer, and a moveable electrode formed with an...
6100773 Impedance matching device  
An impedance matching device includes a variable capacitor constituted by a non-linear dielectric thin film and an upper electrode disposed on a lower electrode formed on a substrate. The...
5959516 Tunable-trimmable micro electro mechanical system (MEMS) capacitor  
A high Q MEMS capacitor that can be continuously tuned with a large tuning ratio or reversibly trimmed using an electrostatic force. The tunable capacitor has a master/slave structure in which a...
5955659 Electrostatically-actuated structures for fluid property measurements and related methods  
A fluid property sensor includes a substrate having a first electrode thereon, and a flexible member adjacent the substrate and the first electrode wherein the flexible member includes a second...
5925117 Method and apparatus for enabling application programs to continue operation when an application resource is no longer present after undocking from a network  
The present invention provides a method and apparatus for maintaining application integrity in a hot, disconnected network environment. The present invention provides a system having a computer...
5901031 Variable capacitor  
A reference electrode is fixed on the bottom of a concave portion of a substrate. A movable electrode is provided so that its electrode face faces that of the reference electrode at an interval to...
5874832 Precise high resolution non-contact method to measure dielectric homogeneity  
An apparatus and method for measuring the dielectric constant or permittivity at a plurality of positions on a test specimen are provided. Accordingly, the present invention enables the spatial...
5771148 Intercalation-based voltage variable capacitor  
A voltage variable capacitor (VVC) is made by placing an intercalation compound between two electrodes of a capacitor. The VVC has a reservoir of an intercalant in proximity with the intercalation...
5721194 Tuneable microwave devices including fringe effect capacitor incorporating ferroelectric films  
The present invention relates to a tuneable fringe effect capacitor for conducting radio frequency energy. The capacitor includes a thin film of ferroelectric material, a pair of films of a...
5636099 Variable capacitor formed by multilayer circuit board  
A variable capacitor for a high frequency circuit of an electrical appliance includes a chip capacitor mounted on a multilayer circuit board and interdigital capacitors formed at inner layers of...
5600187 Electronically controllable capacitors using power MOSFET's  
An electrically controllable variable capacitor includes the interelectrode capacitance of at least one power MOSFET, a capacitance connected in series with the MOSFET and having one terminal...
5589864 Integrated varactor switches for acoustic ink printing  
An integrated varactor and piezoelectric device for an acoustic ink jet ejector includes a substrate having a first surface, the silicon substrate forming a first electrode, an epitaxial layer...
5546006 Guarded capacitance probes for measuring particle concentration and flow  
Guarded capacitance probe structures are constructed with guard electrodes surrounding one or more sensor electrodes and ground electrodes or grounded surfaces surrounding the guard electrodes. In...
5459406 Guarded capacitance probes for measuring particle concentration and flow  
Guarded capacitance probe structures are constructed with guard electrodes surrounding one or more sensor electrodes and ground electrodes or grounded surfaces surrounding the guard electrodes. In...
Matches 1 - 50 out of 143 1 2 3 >