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| Number | Title | Issue Date |
| 8098476 | Fluidic electrostatic energy harvester One embodiment of the present invention relates to a variable capacitor that operates without moving mechanical parts. In this capacitor electrically conductive electrodes are separated by an enclosed chamber filled with an electrically conductive material. The elec... | 01/17/2012 |
| 7872851 | Fluidic based variable capacitor for use in a fluidic electrostatic energy harvester One embodiment of the present invention relates to a variable capacitor that operates without moving mechanical parts. In this capacitor electrically conductive electrodes are separated by an enclosed chamber filled with an electrically conductive material. The elec... | 01/18/2011 |
| 7808767 | Control unit A control unit includes an input terminal and an output terminal for a signal to be controlled, a control input terminal and a control output terminal for a control signal, variable capacitors connected in a bridge configuration between the input terminal and contro... | 10/05/2010 |
| 7440254 | Micro-electromechanical variable capacitor A micro-electromechanical variable capacitor with first and second capacitor plates spaced apart to define a gap therebetween. The first plate has two control electrodes and an active electrode. The second plate is movable relative to first plate when a voltage is a... | 10/21/2008 |
| 7411774 | Voltage variable capacitor A charge storage device having a capacitance that is variable by alteration of the relative permittivity of the dielectric positioned between conductive electrodes within the device. The device consists of two conductive plates sandwiching a conductive grid, typical... | 08/12/2008 |
| 7394642 | Tubular capacitor with variable capacitance and dielectrically elongated inner electrode for NMR applications A tubular capacitor with variable capacitance, including a cylindrical tube (3) of dielectric material, a metallic outer electrode (1) which surrounds the cylindrical tube (3), and an inner electrode which can axially move in the inner bore (... | 07/01/2008 |
| 7385800 | Micro-electro-mechanical system (MEMS) capacitors, inductors, and related systems and methods According to one aspect, the subject matter described herein includes a MEMS fixed capacitor and a method for fabricating the MEMS fixed capacitor. The MEMS fixed capacitor can include a first stationary, capacitive plate on a substrate. Further, the MEMS fixed capa... | 06/10/2008 |
| 7369394 | Variable capacitor, circuit module, and communications apparatus A variable capacitor includes a supporting substrate and a plurality of variable capacitance elements, and bias lines. The plurality of variable capacitance elements is formed on the supporting substrate, each of which is composed of a lower-laid first electrode lay... | 05/06/2008 |
| 7324323 | Photo-sensitive MEMS structure A heat-sensitive apparatus includes a substrate with a top surface, one or more bars being rotatably joined to the surface and having bimorph portions, and a plate rotatably joined to the surface and substantially rigidly joined to the one or more bars. Each bimorph... | 01/29/2008 |
| 7319580 | Collapsing zipper varactor with inter-digit actuation electrodes for tunable filters According to one embodiment a microelectromechanical (MEMS) switch is disclosed. The MEMS switch includes a substrate, a plurality of actuation electrodes mounted on the substrate, a plurality of bottom electrodes mounted on the substrate, a capacitor having subcomp... | 01/15/2008 |
| 7283347 | Low cost digital variable capacitor A digital variable capacitor package is provided as having a ground plane disposed on predetermined portion of the top surface of a substrate. An elongated signal electrode may also be disposed on the substrate and including a first end defining an input and a secon... | 10/16/2007 |
| 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 used as either a pickup electrode or a grounded target electrode for det... | 10/02/2007 |
| 7242569 | Tunable capacitors using fluid dielectrics Capacitors 10, 20, 40, 50, 70, 80) having a fluid dielectric material that is transported or undergoes a phase change are disclosed. The dielectric medium change results in a change in the total dielectric constant of the material between the electrodes (1... | 07/10/2007 |
| 7203052 | Method of fabricating MEMS tunable capacitor with wide tuning range A MEMS tunable capacitor and method of fabricating the same, includes a plurality of fixed charge plates on a substrate, the plurality of fixed charge plates having a same height, being arranged in a shape of comb-teeth and being electrically connected to one anothe... | 04/10/2007 |
| 7190565 | Capacitor having reduced non-capacitive impedance An adjustable capacitor has a tubular housing including a first insulating section and a second section having a conductive portion at the exterior surface thereof forming an external terminal. An external terminal conductor is joined to an exterior terminal portion... | 03/13/2007 |
| 7161791 | Variable capacitance membrane actuator for wide band tuning of microstrip resonators and filters A device for varying the capacitance of an electronic circuit is disclosed. The device comprises a flexible membrane located above the electronic circuit, a metal layer connected to the flexible membrane, and bias circuitry located above the membrane. Variation of t... | 01/09/2007 |
| 7088567 | Tunable capacitors using fluid dielectrics Capacitors (10,20,40,50,70,80) having a fluid dielectric material that is transported or undergoes a phase change are disclosed. The dielectric medium change results in a change in the total dielectric constant of the material between the electrodes (12, 1... | 08/08/2006 |
| 7085121 | Variable capacitance membrane actuator for wide band tuning of microstrip resonators and filters A device for varying the capacitance of an electronic circuit is disclosed. The device comprises a flexible membrane located above the electronic circuit, a metal layer connected to the flexible membrane, and bias circuitry located above the membrane. Variation of t... | 08/01/2006 |
| 7085122 | MEMS tunable capacitor based on angular vertical comb drives A MEMS tunable capacitor with angular vertical comb-drive (AVC) actuators is described where high capacitances and a wide continuous tuning range is achieved in a compact space. The comb fingers rotate through a small vertical angle which allows a wider tuning range... | 08/01/2006 |
| 7081663 | Gate-enhanced junction varactor with gradual capacitance variation A semiconductor junction varactor utilizes gate enhancement for enabling the varactor to achieve a high ratio of maximum capacitance to minimum capacitance. The varactor has a gate region (131 or 181) divided into multiple portions of differing zero-po... | 07/25/2006 |
| 7042699 | Vacuum variable capacitor A vacuum variable capacitor is includes of a vacuum container which is formed by sealing both end of a cylindrical insulator with a fixed-side end plate and a movable-side end plate, a movable conductive member which is disposed opposite to the fixed-side end plate ... | 05/09/2006 |
| 7042698 | MEMS tunable capacitor with a wide tuning range and method of fabricating the same A MEMS tunable capacitor and method of fabricating the same, includes a plurality of fixed charge plates on a substrate, the plurality of fixed charge plates having a same height, being arranged in a shape of comb-teeth and being electrically connected to one anothe... | 05/09/2006 |
| 7023684 | Variable position sensor employing capacitance A variable position sensor has a stationary portion and a moveable portion. A plurality of plates are positioned on one of the members with the surfaces of the plates forming segments of a larger surface. A single plate is mounted on the other of the two members. On... | 04/04/2006 |
| 6980412 | Variable tunable range MEMS capacitor The invention relates to a variable capacitor and method of making it. The variable capacitor comprises a fixed charge plate disposed in a substrate, a movable charge plate disposed above the fixed charge plate, and a stiffener affixed to the movable charge plate. T... | 12/27/2005 |
| 6970340 | Capacitor apparatus of the capacity variable type The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electro... | 11/29/2005 |
| 6961228 | Capacitor apparatus of the capacity variable type The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electro... | 11/01/2005 |
| 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 influenced by a high-frequency voltage substantially. A variable capacitor is ... | 10/04/2005 |
| 6920033 | Variable capacitor having an increased current capacity The invention relates to a variable capacitor which, due to its particular arrangement of electrodes, enables a significantly higher current flow than generally known constructions having the same or a similar structural shape, said capacitor also has an increased l... | 07/19/2005 |
| 6897537 | Micro-electro-mechanical system (MEMS) variable capacitor apparatuses and related methods Micro-Electro-Mechanical System (MEMS) Variable Capacitor Apparatus and Related Methods. According to one embodiment, a MEMS variable capacitor is provided. The variable capacitor can include first and second electrodes being spaced apart, and at least one of the el... | 05/24/2005 |
| 6885537 | Capacitor apparatus of the capacity variable type The present invention is directed to a capacitor apparatus of the capacity variable type. This capacitor apparatus is manufactured by Micro Electro-Mechanical System technology, and comprises an insulating substrate (2) in which at least two capacitor electro... | 04/26/2005 |
| 6865066 | Voltage-controlled variable-capacitance device First and second varactors are disposed on a surface of a P-type substrate. The first varactor includes an N well disposed in the surface of the P-type substrate, a gate insulator disposed on the N well, and an N-type polysilicon layer disposed on the gate insulator... | 03/08/2005 |
| 6856499 | MEMS variable inductor and capacitor A variable passive component is provided for fabrication on a microelectromechanical system (MEMS) device. A conductive portion is provided on a low-profile sliding dielectric sheet that cooperates with a conductive portion disposed on a substrate to provide a varia... | 02/15/2005 |
| 6747863 | Electrostatic drive An electrostatic drive having a plurality of mover electrodes operatively secured to a mover, and a plurality of stator electrodes operatively secured to a stator. The mover and stator are configured to move relative to each other via electrostatic force generated b... | 06/08/2004 |
| 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 anisotropic stress in a predetermined direction and dispos... | 11/11/2003 |
| 6636414 | High power variable slide RF tuner A high power slide tuning capacitor (200) integrated into a circuit board adapted to function at RF and microwave frequencies. The capacitor (200) includes a dielectric substrate (26) with a cavity (28) cut into a side of the substrate (26); a ground plan... | 10/21/2003 |
| 6600644 | Microelectronic tunable capacitor and method for fabrication A microelectronic tunable capacitor and a method for fabricating the capacitor are described. The capacitor is formed by a micro-actuator, a first fixed capacitor plate and a second swayable capacitor plate suspended over the first plate. The micro-actuat... | 07/29/2003 |
| 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. The outer portion of the top plate moves relative to the bo... | 04/15/2003 |
| 6504703 | Capacitive transducer apparatus and method of manufacture thereof for computer display user interface A capacitive transducer apparatus converts mechanical force to electrical signal parameters by change of spacing between plates of a plurality of capacitors. The apparatus has two mechanical components. The first component includes an articulating member ... | 01/07/2003 |
| 6501637 | Trimmer capacitor A trimmer capacitor includes anchor portions that are arranged to be stepped down from the surface of a fixed electrode and are embedded in a stator near the upper surface of the stator at the tip portions of the fixed electrode. Because the tip portion o... | 12/31/2002 |
| 6473289 | Vacuum variable capacitor An improved vacuum variable capacitor can include one or more characteristics that provide advantages over previous vacuum variable capacitors. In particular, the vacuum variable capacitor can be constructed so as to enable the capacitance to be adjusted ... | 10/29/2002 |
