Entries |
Document | Title | Date |
20080204967 | Apparatus and method capable of a high fundamental acoustic resonance frequency and a wide resonance-free frequency range - An embodiment of the present invention provides a method of modeling electrostrictive effects and acoustic resonances in a tunable capacitor, comprising adjusting empirically the characteristic impedances and complex propagation constants to account for actual process variations in manufacturing of said tunable capacitor; adjusting empirically the characteristic impedances and complex propagation constants to account for end-effects in the directions transversal to the wave direction; and modeling the electrostrictive effect by dividing a BST layer of said tunable capacitor into thin layers or slices with each slice's thickness representing a small fraction of an acoustic wavelength and injecting at each junction between slices, an acoustic “current” proportional to the electrical current through said voltage tunable capacitor. | 08-28-2008 |
20080247115 | VARIABLE DEVICE CIRCUIT AND METHOD FOR MANUFACTURING THE SAME - There is provided a variable device circuit according to the present invention, including: a substrate; at least one movable switch device formed on a first principal surface of the substrate; at least one fixed capacitor device formed on the first principal surface of the substrate; at least one variable capacitor device formed on the first principal surface of the substrate; at least one variable inductor device formed on the first principal surface of the substrate; and wiring lines for electrically connecting the devices to one another, the wiring lines being formed on the first principal surface of the substrate; wherein electrical connections among the devices can be selected by operation of the movable switch device, whereby achieving stable, low-loss circuit characteristics with lower manufacturing cost. | 10-09-2008 |
20080273285 | PRECISION LASER ADJUSTABLE THIN FILM CAPACITORS - Disclosed are apparatus and methodology for providing a precision laser adjustable (e.g., trimmable) thin film capacitor array. A plurality of individual capacitors are formed on a common substrate and connected together in parallel by way of fusible links. The individual capacitors are provided as laddered capacitance value capacitors such that a plurality of lower valued capacitors corresponding to the lower steps of the ladder, and lesser numbers of capacitors, including a single capacitor, for successive steps of the ladder, are provided. Precision capacitance values can be achieved by either of fusing or ablating selected of the fusible links so as to remove the selected subcomponents from the parallel connection. In-situ live-trimming of selected fusible links may be performed after placement of the capacitor array on a hosting printed circuit board. | 11-06-2008 |
20080297972 | Capacitor structure with variable capacitance, and use of said capacitor structure - A capacitor structure with variable capacitance, has at least one capacitor. More specifically, the structure has a capacitor electrode, a capacitor counter-electrode arranged opposite said capacitor electrodes at a variable capacitor electrode distance in relation hereto and at least one actuator for varying the capacitor electrode distance, and an actuator electrode for electrically controlling the actuator by which the variation in the capacitor electrode distance is effected. The the actuator electrode and one of the capacitor electrodes of the capacitor are arranged next to one another on a common carrier. Advantageously, the actuator electrode and the capacitor electrode arranged next to said actuator electrode are electrically isolated from one another. By this, the control circuit and function circuit are decoupled. Advantageously, the actuator is a piezoceramic bending transducer. The capacitor structure is deployed for example in a voltage-controlled oscillator (VCO). The capacitor structure is used in particular in communications technology and mobile radio technology. The capacitor structure provides a basic element of the “software defined radio” (SDR) concept. | 12-04-2008 |
20080297973 | Varactors including interconnect layers - In an embodiment of the present invention is provided a varactor comprising a substrate, a bottom electrode positioned on a surface of the substrate, a tunable dielectric material positioned adjacent to and extending over the bottom electrode forming a step and in contact with a top electrode, and an interconnect layer in contact with the bottom electrode, the tunable dielectric and the top electrode. | 12-04-2008 |
20090009925 | Tuneable Electronic Devices and Electronic Arrangements Comprising Such Tuneable Devices - An RF MEMS tuneable arrangement, e.g. variable capacitor, having two or more tunable devices, e.g. variable capacitances, a coupling circuit arranged to couple the tunable devices together to provide a combined output, e.g. a combined capacitance, that is variable according to a tuning signal. The coupling circuit is reconfigurable to alter a response of the arrangement to changes in the tuning signal, to enable a broader range of applications, manufacturing cost reductions and more flexibility in design. The device can have a pivoted beam ( | 01-08-2009 |
20090185325 | ARRAY VARIABLE CAPACITOR APPARATUS - An array variable capacitor apparatus includes a line unit including a ground line and a signal line which operates as a lower electrode; and a plurality of plates which are engaged with the line unit to generate capacitance and which operate as upper electrodes, the plurality of plates being arranged in an array pattern and having different degrees of stiffness. | 07-23-2009 |
20090190284 | ELECTRONIC ELEMENT, VARIABLE CAPACITOR, MICRO SWITCH, METHOD FOR DRIVING MICRO SWITCH, AND MEMS TYPE ELECTRONIC ELEMENT - Driving is made possible in a moving range equivalent to or wider than the conventional range, with a driving voltage having a range smaller than a pull-in voltage. An electronic element includes a fixed portion, and a movable portion which is movable with respect to the fixed portion and which is provided to generate a spring force to make restoration to a predetermined position. The fixed portion is provided with a first driving electrode and a first signal electrode. The movable portion is provided with a second driving electrode and a second signal electrode. An electrostatic force is generated between the first driving electrode and the second driving electrode by a voltage applied therebetween so that the electrostatic force resists against the spring force; and the first and second driving electrodes and the first and second signal electrodes are arranged so that the electrostatic force is generated in a direction in which a spacing distance between the first and second signal electrodes is widened. | 07-30-2009 |
20090213522 | ON-CHIP ADJUSTMENT OF MIMCAP AND VNCAP CAPACITORS - One or more on-chip VNCAP or MIMCAP capacitors utilize a variable MOS capacitor to improve the uniform capacitance value of the capacitors. This permits the production of silicon semiconductor chips on which are mounted capacitors having capacitive values that are precisely adjusted to be within a range of between about 1% and 5% of their design value. This optimization can be achieved by the use of a back-to-back connection between a pair of the variable MOS capacitors for DC decoupling. It involves the parallelization of on-chip BEOL capacitance of VNCAP and/or MIMCAP capacitors by the insertion in the FEOL of pairs of back-to-back variable MOS capacitors. | 08-27-2009 |
20090273880 | VARIABLE CAPACITOR AND FILTER CIRCUIT WITH BIAS VOLTAGE - A variable capacitor includes a metal oxide film having a perovskite structure, first and second electrode films having the metal oxide film placed therebetween and to be coupled to an external voltage source, and a bias voltage source configured to provide a bias voltage that is applied in series or parallel to a capacitance of a capacitor including the metal oxide film and the first and second electrode films, wherein the bias voltage applied by the bias voltage source to the capacitance is adapted to maximize a voltage dependency of a relative permittivity of the metal oxide film. | 11-05-2009 |
20090284895 | Radio frequency tunable capacitors and method of manufacturing using a sacrificial carrier substrate - An embodiment of the present invention provides a method, comprising manufacturing capacitors by creating a wafer using a substrate as a sacrificial carrier for the construction of said capacitor; and removing said sacrificial carrier wafer once said capacitor processing is complete. | 11-19-2009 |
20090310275 | Variable Capacitance Capacitor Array, Variable Capacitance Capacitor Array Device and Circuit Module - The invention relates to a variable capacitor array which has excellent controllability on a capacitance value and has variable and high tunability. The variable capacitor array includes a first variable capacitor (C | 12-17-2009 |
20100110606 | TUNABLE CAPACITOR USING ELECTROWETTING PHENOMENON - A tunable capacitor using an electrowetting phenomenon includes a first electrode; a second electrode which is spaced apart from the first electrode and faces the first electrode; a fluidic channel which is disposed between the first electrode and the second electrode; a first insulating layer which is disposed between the first electrode and the fluidic channel; and a conductive fluid which is disposed in the fluidic channel and moves along the fluidic channel when a direct current (DC) potential difference occurs between the first and second electrodes. Accordingly, it is possible to fabricate the tunable capacitor with the simplified fabrication process, good reliability and durability, and no restriction on the tuning range. | 05-06-2010 |
20100149721 | VARIABLE CAPACITANCE ELECTRONIC DEVICE AND MICROELECTROMECHANICAL DEVICE INCORPORATING SUCH ELECTRONIC DEVICE - An electronic device includes a capacitive component with variable capacitance and a control stage, coupled to the capacitive component for controlling the capacitance thereof, on the basis of a reference signal, with a reference frequency, and an excitation signal, with a frequency that is a multiple of the reference frequency. The capacitive component includes a variable capacitive network having a plurality of switched capacitors, each of which can be switched selectively between a first configuration, in which it is connected between connection terminals of the capacitive component, and a second configuration, in which it is connected at most to one of the connection terminals. The control stage includes a logic module, coupled to the variable capacitive network for switching periodically each capacitor between the first configuration and the second configuration on the basis of the reference signal. A sign circuit, coupled to the capacitive component supplies a control signal having edges concordant with the excitation signal in one half-period of each cycle of the reference signal and discordant edges in the other half-period. | 06-17-2010 |
20100214715 | Variable Capacitance Unit - Implementations of differential variable capacitance systems are disclosed. | 08-26-2010 |
20100238602 | Electrostrictive Resonance Suppression for Tunable Capacitors - A multi-layered capacitor includes three or more capacitor layers. A first layer includes a first DC-biased, tunable capacitor. A second layer, acoustically coupled to the first layer, includes a second DC-biased, tunable capacitor. A third layer, acoustically coupled to the second layer, includes a third DC-biased, tunable capacitor. Each dielectric of the first, second, and third capacitors has a resonance of about the same frequency, within 5%, and inner electrodes of the first, second, and third capacitors have a resonance of about the same frequency, within 5%. The resonance of each layer is a function of at least thickness, density, and material. The first, second, and third layers are biased to generate destructive acoustic interference, and the multi-layer capacitor is operable at frequencies greater than 0.1 GHz. | 09-23-2010 |
20100259864 | VARACTOR ELEMENT AND ELECTRONIC DEVICE - A varactor element, includes: a dielectric layer; a pair of signal electrodes, each disposed on one face of the dielectric layer and facing each other; and a pair of control electrodes, each disposed on another face of the dielectric layer and facing each other parallel to a direction intersecting a direction of the pair of signal electrodes facing each other. | 10-14-2010 |
20110002080 | METHOD AND APPARATUS FOR USE IN DIGITALLY TUNING A CAPACITOR IN AN INTEGRATED CIRCUIT DEVICE - A method and apparatus for use in a digitally tuning a capacitor in an integrated circuit device is described. A Digitally Tuned Capacitor DTC is described which facilitates digitally controlling capacitance applied between a first and second terminal. In some embodiments, the first terminal comprises an FW+ terminal and the second terminal comprises an RF terminal. In accordance with some embodiments, the DTCs comprises a plurality of sub-circuits ordered in significance from least significant bit (LSB) to most significant bit (MSB) sub-circuits, wherein the plurality of significant bit sub-circuits are coupled together in parallel, and wherein each sub-circuit has a first node coupled to the first RF terminal, and a second node coupled to the second FW terminal. The DTCs further include an input means for receiving a digital control word, wherein the digital control word comprises bits that are similarly ordered in significance from an LSB to an MSB. | 01-06-2011 |
20110038093 | TURNABLE CAPACITOR AND SWITCH USING MEMS WITH PHASE CHANGE MATERIAL - The present invention relates to a MEMS, being developed for e.g. a mobile communication application, such as switch, tunable capacitor, tunable filter, phase shifter, multiplexer, voltage controlled oscillator, and tunable matching network. The volume change of phase-change layer is used for a bi-stable actuation of the MEMS device. The MEMS device comprises at least a bendable cantilever, a phase change layer, and electrodes. A process to implement this device and a method for using is given. | 02-17-2011 |
20110051309 | TUNABLE CAPACITOR - The invention relates to electronic device having an operation temperature range, wherein the electronic device comprises a tunable capacitor (CST) comprising a first electrode (BE), a second electrode (TE), and a dielectric (FEL) arranged between the first electrode (BE) and the second electrode (TE). The dielectric (FEL) comprises dielectric material (FEL) having a value of a relative dielectric constant (ε | 03-03-2011 |
20110063773 | MEMS DEVICE - According to one embodiment, a MEMS device includes first and second lower electrodes on a substrate, a first driving electrode forming a capacitance element having a first capacitance between the first lower electrode and the first driving electrode, a second driving electrode forming a capacitance element having a second capacitance between the second lower electrode and the second driving electrode, an upper electrode which is supported in midair above the driving electrodes and which moves toward the driving electrodes and which has a variable third capacitance between the first driving electrode and the upper electrode and has a variable fourth capacitance between the second driving electrode and the upper electrode. A capacitance value between the lower electrodes is determined by a value of a composite capacitance of the first to fourth capacitances connected in series, and the value of the composite capacitance is used as a variable capacitance value. | 03-17-2011 |
20110080686 | MIM CAPACITOR - A method of forming a metal-insulator-metal capacitor having top and bottom plates separated by a dielectric layer, one of the top and bottom plates having at least one protrusion extending into a corresponding cavity in the other of the top and bottom plates, the method including the steps of growing one or more nanofibers on a base surface. | 04-07-2011 |
20110085278 | SELECTABLE CAPACITANCE CIRCUIT - A voltage-controlled capacitor and methods for forming the same are described. A mechanical conductor membrane of the voltage-controlled capacitor is movable to and from a first position and a second position. An amount of capacitance can vary with the movement of the mechanical conductor membrane. A microelectromechanical systems (MEMS) voltage-controlled capacitor can be used in a variety of applications, such as, but not limited to, RF switches and RF attenuators. | 04-14-2011 |
20110134582 | VARIABLE CAPACITANCE DEVICE - A variable capacitance device including: a device body having a plurality of dielectric layers formed by a dielectric material changing in capacitance according to a control signal applied externally and laminated in a predetermined direction and an internal electrode section including at least one internal electrode formed in each of both surfaces of each dielectric layer, three or more capacitors being formed by the plurality of dielectric layers and the internal electrode section, and the three or more capacitors being connected in series with each other; and at least three control terminals supplied with the control signal, and respectively arranged for at least three internal electrodes forming at least two capacitors of the three or more capacitors. | 06-09-2011 |
20110149464 | Voltage controlled variable capacitor and voltage controlled oscillator - There is provided a voltage variable capacitor that can be formed on a semiconductor circuit, has a large variable ratio of capacitances and a high Q value, and achieves a highly linear relation of a control voltage and an oscillation frequency when the capacitor forms a VCO. The voltage variable capacitor is formed of a plurality of MOS capacitance elements (CM | 06-23-2011 |
20110157762 | CAPACITIVE INPUT DEVICE AND ELECTRO-OPTICAL APPARATUS WITH INPUT FUNCTION - A capacitive input device includes: an input device substrate having a position detection electrode on a second surface side which is reverse to a first surface side on which an input operation is performed; and a shielding film which has a shield electrode layer on a base film and is adhered to the second surface side of the input device substrate by an adhesive layer. | 06-30-2011 |
20110176252 | MEMS SPRUNG CANTILEVER TUNABLE CAPACITORS AND METHODS - The present subject matter relates to MEMS tunable capacitors and methods for operating such capacitors. The tunable capacitor can feature a primary stationary actuator electrode on a substrate, a secondary stationary actuator electrode on the substrate, a stationary RF signal capacitor plate electrode on the substrate, a sprung cantilever disposed over the substrate, a beam anchor connecting a first end of the sprung cantilever to the substrate, and one or more elastic springs or other biasing members connecting a second end of the sprung cantilever to the substrate, the second end being located distally from the first end. The spring cantilever can be movable between an OFF state defined by the potential difference between the stationary and moveable actuator electrodes being zero, and an ON state defined by a non-zero potential difference between the stationary and moveable actuator electrodes. | 07-21-2011 |
20110228440 | MICROSTRUCTURAL BODY AND PRODUCTION METHOD THEREFOR - A microstructural body includes a substrate such as an electrode substrate, a support portion, one post that fixes the support portion to the substrate, a frame-shaped movable portion provided around outer periphery of the support portion, and an elastic support portion that elastically connects the movable portion and the support portion. The elastic support portion supports the frame-shaped movable portion such that the movable portion is movable relative to the support portion. The elastic support portion includes torsion springs and an elastically deformable connecting portion. | 09-22-2011 |
20120044610 | Y-Doped Barium Strontium Titanate For Stoichiometric Thin Film Growth - Disclosed is a process for generating thin-film barium strontium titanate (“BST”) having a lattice comprised of a plurality of A lattice sites and a B lattice site, in which a yttrium may be found at a location of at least one location of the plurality of A lattice sites or the B lattice site. In one embodiment, the plurality of A lattice sites comprises a location for at least one from a group consisting of barium and strontium. In one embodiment, the B lattice site comprises a location for a titanium. A capacitor having the inventive Y-doped BST dielectric is also disclosed. | 02-23-2012 |
20130176657 | ELECTROMECHANICAL SYSTEMS VARIABLE CAPACITANCE ASSEMBLY - This disclosure provides systems, methods and apparatus for a variable capacitance apparatus. In one aspect, an apparatus includes a plurality of electromechanical systems varactors connected in parallel. Each of the plurality of electromechanical systems varactors includes a first, a second, and a third metal layer. The first metal layer includes a first bias electrode. The second metal layer is spaced apart from the first metal layer to define a first air gap, and includes a first radio frequency electrode. A third metal layer is spaced apart from the second metal layer to define a second air gap, and includes a second radio frequency electrode and a second bias electrode. The second bias electrode of each of the plurality of electromechanical systems varactors has a different projected area perpendicular to a surface of the second metal layer and onto the surface of the second metal layer. | 07-11-2013 |
20130182366 | MEMS DEVICE AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a MEMS element comprises a first electrode fixed on a substrate, a second electrode formed above the first electrode to face it, and vertically movable, a first anchor portion formed on the substrate and configured to support the second electrode, and a first spring portion configured to connect the second electrode and the first anchor portion. The first spring portion includes a liner layer includes a brittle material in contact with the second electrode and the first anchor portion, and a base layer formed on the liner layer, includes a brittle material having a composition different from that of the liner layer, and having a film thickness larger than that of the liner layer. | 07-18-2013 |
20130208396 | Digitally Tuned Capacitors with Tapered and Reconfigurable Quality Factors - The present disclosure describes tuning capacitors with tapered and reconfigurable quality factors. Digitally tuned capacitors (DTCs) that provide a variable quality factor (Q) while maintaining a constant or near constant capacitance as well as DTCs that provide one or more Q values in a tapered distribution while maintaining a constant or near constant capacitance are described. The present disclosure also describes DTCs that provide one or more capacitances in a tapered distribution and one or more Q values in a tapered distribution. | 08-15-2013 |
20130279068 | Capacitors Adapted for Acoustic Resonance Cancellation - An embodiment of the present invention provides a method, comprising reducing the losses due to electro-mechanical coupling and improving Q in a multilayered capacitor by placing a first capacitor layer adjacent at least one additional capacitor layer and sharing a common electrode in between the two such that the acoustic vibration of the first layer is coupled to an anti-phase acoustic vibration of the at least one additional layer. | 10-24-2013 |
20130342953 | HIGH VOLTAGE NON-COPLANAR INTERDIGITATED VARACTOR - A high voltage varactor that provides a large tuning ratio and a high DC biasing capability includes a non-coplanar interdigitated structure having a stacked structure with a plurality of substantially parallel coplanar first electrode fingers and a plurality of substantially parallel coplanar second electrode fingers. The plurality of substantially parallel coplanar second electrode fingers are interdigitated with the plurality of substantially parallel coplanar first electrode fingers and are not coplanar with the plurality of substantially parallel coplanar first electrode fingers. A voltage tunable dielectric layer may be interposed between the plurality of substantially parallel coplanar first electrode fingers and the plurality of substantially parallel coplanar second electrode fingers. The voltage tunable dielectric layer may be a BST layer, or any other voltage tunable dielectric layer. | 12-26-2013 |
20140211366 | MICRO-ELECTRO-MECHANICAL SYSTEM (MEMS) VARIABLE CAPACITOR APPARATUSES AND RELATED METHODS - Systems, devices, and methods for micro-electro-mechanical system (MEMS) tunable capacitors can include a fixed actuation electrode attached to a substrate, a fixed capacitive electrode attached to the substrate, and a movable component positioned above the substrate and movable with respect to the fixed actuation electrode and the fixed capacitive electrode. The movable component can include a movable actuation electrode positioned above the fixed actuation electrode and a movable capacitive electrode positioned above the fixed capacitive electrode. At least a portion of the movable capacitive electrode can be spaced apart from the fixed capacitive electrode by a first gap, and the movable actuation electrode can be spaced apart from the fixed actuation electrode by a second gap that is larger than the first gap. | 07-31-2014 |
20140268481 | COMPLEX OXIDE, THIN-FILM CAPACITIVE ELEMENT, LIQUID DROPLET DISCHARGE HEAD, AND METHOD OF PRODUCING COMPLEX OXIDE - A complex oxide includes a chemical compound represented by ABO | 09-18-2014 |
20140285944 | ELECTROSTATIC CAPACITANCE ELEMENT AND RESONANCE CIRCUIT - A capacitance element body | 09-25-2014 |
20150131197 | SYSTEMS AND METHODS FOR CALIBRATING A TUNABLE COMPONENT - Systems, devices, and methods for adjusting tuning settings of tunable components, such as tunable capacitors, can be configured for calibrating a tunable component. Specifically, the systems, devices and methods can measure a device response for one or more inputs to a tunable component, store a calibration code in a non-volatile memory that characterizes the device response of the tunable component, and adjust a tuning setting of the tunable component based on the calibration code to achieve a desired response of the tunable component. | 05-14-2015 |
20150310996 | ELECTRONIC DEVICE - According to one embodiment, an electronic device includes at least one variable capacitor including a first electrode and a second electrode, and being brought into one of a first state and a second state according to a voltage applied between the first electrode and the second electrode, the first electrode and the second electrode being closer to each other in the second state compared with in the first state, and a charge pump circuit provided in a first integrated circuit chip and producing a voltage for establishing the second state. An external capacitor is connectable to the first integrated circuit chip and is receivable the voltage produced by the charge pump circuit. | 10-29-2015 |
20160099112 | SYSTEMS, DEVICES, AND METHODS TO REDUCE DIELECTRIC CHARGING IN MICRO-ELECTRO-MECHANICAL SYSTEMS DEVICES - The present subject matter relates to devices, systems, and methods for isolation of electrostatic actuators in MEMS devices to reduce or minimize dielectric charging. A tunable component can include a fixed actuator electrode positioned on a substrate, a movable actuator electrode carried on a movable component that is suspended over the substrate, one or more isolation bumps positioned between the fixed actuator electrode and the movable actuator electrode, and a fixed isolation landing that is isolated within a portion of the fixed actuator electrode that is at, near, and/or substantially aligned with each of the one or more isolation bumps. In this arrangement, the movable actuator electrode can be selectively movable toward the fixed actuator electrode, but the one or more isolation bumps can prevent contact between the fixed and movable actuator electrodes, and the fixed isolation landing can inhibit the development of an electric field in the isolation bump. | 04-07-2016 |