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236 results about "Effective capacitance" patented technology

The effective capacitance and inductance can be calculated and approximated in a single SRR. Larger, effective capacitance values are expected for 2. A dielectric layer beneath the metallic bridge and above the striplines and actuating contact increases the effective capacitance.

Body contacted dynamic memory

A dynamic memory circuit in which the inherent bipolar transistor effect within a floating body transistor is utilized to store an information bit. A floating body of a storage transistor stores an information bit in the form of an electric charge. The floating body is charged and discharged via an access transistor during data write operations. The inherent bipolar transistor resident within the floating body transistor increases the effective capacitance of the floating body which acts as the storage node, and thereby enhances the magnitude of the discharge current which represents the stored information bit during read operations.
Owner:IBM CORP

Methods and apparatus for control of inductively coupled power transfer systems

A power pick-up for an Inductively Coupled Power Transfer (ICPT) system is provided having a resonant pick up circuit. The natural frequency of the pick-up circuit may be varied by controlling the conductance or capacitance of a variable reactive in the resonant circuit. The load being supplied by the pick-up circuit is sensed, and the effective capacitance or inductance of the variable reactive component is controlled to vary the natural resonant frequency of the pick-up circuit to thereby control the power flow into the pick-up to satisfy the power required by the load.
Owner:AUCKLAND UNISERVICES LTD

Biosensor apparatus and method with sample type and volume detection

A biosensor apparatus and method with sample type and cell volume detection. The apparatus includes a sine wave generator to apply an AC signal to a biosensor cell containing a sample, a current-to-voltage converter, a phase shifter, a square wave generator, a synchronous demodulator, and a low pass filter which yields a signal proportional to the effective capacitance across the biosensor cell, which is proportional to the volume of the sample. In addition, the current-to-voltage converter yields a signal indicative of the type of sample contained within the biosensor cell. The method includes applying a sine wave to the biosensor cell, shifting the phase of the resultant signal, generating a square wave synchronous with the sine wave, demodulating the resultant signal with the square wave, and filtering the demodulated signal to produce a signal proportional to the effective capacitance across the biosensor cell. The biosensor apparatus and method are capable of determining sample type and measuring glucose levels over a wide range of sample volumes.
Owner:LIFESCAN IP HLDG LLC

Mutual capacitance touch screen and combined mutual capacitance touch screen

A mutual capacitance touch screen and a combined mutual capacitance touch screen formed by the combination of mutual capacitance touch screens. A driving layer and a sensor layer are included, wherein the driving layer comprises driving electrodes distributed at intervals in the same plane; the sensor layer comprises sense electrodes distributed at intervals in the same plane; and the places where the sense electrodes are distributed in the sensor layer are just over against the intervals between the driving electrodes in the driving layer so that the driving electrodes and the sense electrodes together fill the touch area of the touch screen. The driving electrodes are not over against the sense electrodes in terms of space positions to increase the proportion of capacitance CT to mutual capacitance C, wherein the capacitance CT is formed between the driving electrodes and the top of the sense electrodes; consequently, the effective capacitivity of the mutual capacitance touch screen is effectively increased.
Owner:FOCALTECH SYST LTD

Tuning capacitance to enhance FET stack voltage withstand

An RF switch to controllably withstand an applied RF voltage Vsw, or a method of fabricating such a switch, which includes a string of series-connected constituent FETs with a node of the string between each pair of adjacent FETs. The method includes controlling capacitances between different nodes of the string to effectively tune the string capacitively, which will reduce the variance in the RF switch voltage distributed across each constituent FET, thereby enhancing switch breakdown voltage. Capacitances are controlled, for example, by disposing capacitive features between nodes of the string, and / or by varying design parameters of different constituent FETs. For each node, a sum of products of each significant capacitor by a proportion of Vsw appearing across it may be controlled to approximately zero.
Owner:PSEMI CORP

Combined matching and filter circuit

A combined matching and harmonic rejection circuit with increased harmonic rejection provided by a split resonance for one or more of the capacitive or inductive elements of the circuit. At a fundamental frequency, the circuit comprises an inductive series arm with capacitive shunt arms. The capacitance of a shunt arm may be provided by two or more parallel paths, each having a capacitor and an inductor in series so that, in addition to providing the effective capacitance necessary for impedance matching at the fundamental frequency, two separate harmonics represented by the series resonances of the parallel paths are rejected. In this manner, an extra null in the circuit's stop-band may be achieved using the same number of shunt elements necessary to achieve impedance matching at the fundamental frequency.
Owner:MACOM TECH SOLUTIONS HLDG INC

Method and apparatus for control of inductively coupled power transfer systems

A power pick-up for an Inductively Coupled Power Transfer (ICPT) system is provided having a resonant pick up circuit. The natural frequency of the pick-up circuit may be varied by controlling the conductance or capacitance of a variable reactive in the resonant circuit. The load being supplied by the pick-up circuit is sensed, and the effective capacitance or inductance of the variable reactive component is controlled to vary the natural resonant frequency of the pick-up circuit to thereby control the power flow into the pick-up to satisfy the power required by the load.
Owner:AUCKLAND UNISERVICES LTD

Systems and methods for calibrating a switched mode ion energy distribution system

Systems, methods and apparatus for regulating ion energies and ion energy distributions along with calibrating a bias source and a plasma processing chamber are disclosed. An exemplary method includes applying a periodic voltage function to a load emulator, which emulates electrical characteristics of a plasma load and associated electronics such as an e-chuck. The load emulator can be measured for various electrical parameters and compared to expected parameters generated by the bias source. Differences between measured and expected values can be used to identify and correct faults and abnormalities in the bias supply, the chamber, or a power source used to ignite and sustain the plasma. Once the bias supply is calibrated, the chamber can be calibrated by measuring and calculating an effective capacitance comprising a series and parallel capacitance of the substrate support and optionally the substrate.
Owner:AES GLOBAL HLDG PTE LTD

Method and structure for a 1T-RAM bit cell and macro

A one transistor (1T-RAM) bit cell and method for manufacture are provided. A metal-insulator-metal (MIM) capacitor structure and method of manufacturing it in an integrated process that includes a finFET transistor for the 1T-RAM bit cell is provided. In some embodiments, the finFET transistor and MIM capacitor are formed in a memory region and an asymmetric processing method is disclosed, which allows planar MOSFET transistors to be formed in another region of a single device. In some embodiments, the 1T-RAM cell and additional transistors may be combined to form a macro cell, multiple macro cells may form an integrated circuit. The MIM capacitors may include nanoparticles or nanostructures to increase the effective capacitance. The finFET transistors may be formed over an insulator. The MIM capacitors may be formed in interlevel insulator layers above the substrate. The process provided to manufacture the structure may advantageously use conventional photomasks.
Owner:TAIWAN SEMICON MFG CO LTD

Next high frequency improvement by using frequency dependent effective capacitance

A connector is provided for simultaneously improving both the NEXT high frequency performance when low crosstalk plugs are used and the NEXT low frequency performance when high crosstalk plugs are used. The connector includes a first compensation structure provided on an inner metalized layer of the PCB at a first stage area of the PCB, and a second compensation structure, provided at a second stage area of the PCB, for increasing compensation capacitance with increasing frequency.
Owner:COMMSCOPE INC

Method and System for Wireless Power Transfer Calibration

In a WPT system, varying parameters, such as coupling coefficient, may cause the system to fall out of resonance and / or tuning. By monitoring one or more signals within a coil module of the WPT device, this detuning can be detected. Moreover, the WPT system can retune itself by modifying one or more parameters in a transmitting WPT device and / or a receiving WPT device. For example, coil circuits in the transmitting and / or receiving WPT devices can be configured to allow for adjusting of effective capacitance, effective inductance, load resistance, and / or load inductance. In addition, frequency can be modified to permit adjusting power transfer efficiency.
Owner:AVAGO TECH INT SALES PTE LTD

Differential inductor design for high self-resonance frequency

A differential inductor is formed from branch coils that are staggered with respect to one another rather than concentrically coiled within one another. Each coil is formed from conductive strips. The conductive strips with the largest voltage swings thereon are shielded from one another by conductive strips with lower voltage swings thereon. This shielding allows the effective capacitance of the differential inductor to be lowered, which in turn raises the range of frequencies at which the differential inductor can operate.
Owner:QORVO US INC

Method for tuning an embedded capacitor in a multilayer circuit board

Exemplary techniques for tuning the effective capacitance provided by an embedded capacitor are disclosed. The techniques may be realized by modifying one or more conductive features of one or more vias connected to the embedded capacitor to adjust the capacitance contributed by the one or more vias. One technique preferably includes altering the conductive surface area of a pad of one or more vias to which the embedded capacitor is electrically connected to increase or decrease the contributed capacitance. Another technique provides for bore drilling or tap drilling one or more vias connected to the embedded capacitor to increase the surface area of plated interior surfaces of the vias, thereby increasing their capacitive effect. An additional technique includes forming a number of vias having various capacitive effects and electrically connecting the embedded capacitor to one or more of these vias to increase the capacitance.
Owner:RPX CLEARINGHOUSE

Characterization and measurement of superconducting structures

A structure comprising a tank circuit inductively coupled to a flux qubit or a phase qubit. In some embodiments, a low temperature preamplifier is in electrical communication with the tank circuit. The tank circuit comprises an effective capacitance and an effective inductance that are in parallel or in series. In some embodiments, the effective inductance comprises a multiple winding coil of wire. A method that includes the steps of (i) providing a tank circuit and a phase qubit that are inductively coupled, (ii) reading out a state of the phase qubit, (iii) applying a flux to the phase qubit that approaches a net zero flux, (iv) increasing a level of flux applied to the phase qubit, and (v) observing a response of the tank circuit in a readout device.
Owner:D WAVE SYSTEMS INC

High voltage ESD protection featuring pnp bipolar junction transistor

A protection circuit is disclosed that protects a semiconductor device from damage due to an electrostatic discharge. One such protection circuit comprises a vertical pnp hetero-junction bipolar transistor (HBT) connected between terminals such as supply terminals of the device, configured to conduct during an electrostatic discharge. The protection circuit also comprises a trigger circuit, such as a transient activated RC circuit connected between the terminals to detect the electrostatic discharge and control the transistor based on the detected electrostatic discharge. A Darlington transistor pair in the trigger circuit can be used to multiply the effective capacitance and HBT drive current. The HBT transistor absorbs energy from the electrostatic discharge and clamps the over-voltage across the terminals. The protection circuit may also be used across other I / O terminals of the device.
Owner:TEXAS INSTR INC

Variable capacitor for resonant power transfer systems

Systems and designs for tuning a wireless power transfer system are provided, which may include any number of features. In one embodiment, a wireless power transfer system can include first and second switched capacitor circuits electrically connected to opposite poles of the inductor of a resonator in the wireless power system. The first and second switched capacitor circuits can be switched on and off with MOSFETS to change a capacitance of the circuits, and thus an effective capacitance of the resonator. Methods of use are also provided.
Owner:TC1 LLC

Switch driver with slew rate control

System and method for providing power to circuitry while avoiding a large transient current. A preferred embodiment comprises a distributed switch (such as switch arrangement 400) with a plurality of switches (such as switch 405) coupling a power supply to the circuitry. Each switch is individually controlled by a control signal and is turned on sequentially. Also coupled to each switch is a pre-driver circuit (such as pre-driver circuit 410). The pre-driver circuit comprises a potential adjust circuit (such as potential adjust circuit 505) that rapidly adjusts a voltage potential at the switch and a rate adjust circuit (such as the rate adjust circuit 520) that accelerates the power ramp-up across the switch once transient currents are no longer a concern. Adjusting the voltage potential so that the switch operates in a saturation mode increases an effective capacitance across the switch and thereby retarding the power ramp-up across the switch.
Owner:TEXAS INSTR INC

Driver amplifier having a programmable output impedance adjustment circuit

A driver amplifier in an integrated circuit is suitable for driving a signal onto an output node and through an output terminal, and through a matching network to a power amplifier. A novel Programmable Output Impedance Adjustment Circuit (POIAC) within the integrated circuit is coupled to the output node and affects an output impedance looking into the output terminal. When the output impedance would otherwise change (for example, due to a driver amplifier power gain change), the POIAC adjusts how it loads the output node such that the output impedance remains substantially constant. The POIAC uses a series-connected inductor and capacitor L-C-R circuit to load the output node, thereby reducing the amount of capacitance and die area required to perform multi-band impedance matching with a power amplifier. Multi-band operation is accomplished by changing an effective capacitance in the L-C-R circuit depending on communication band information received by the POIAC.
Owner:QUALCOMM INC

Switched capacitor circuit compensation apparatus and method

A compensated switched capacitor circuit comprises a switched capacitor circuit and a compensation circuit. The compensation circuit generates a reference current that varies under closed loop control to maintain a targeted slew rate for charging a reference capacitor that is determined by the input clock frequency. The switched capacitor circuit's output amplifier is configured such that its output current varies in proportion to the reference current. Thus, by configuring the reference capacitor to track the effective capacitance of the switched capacitor circuit, the settling time of the switched capacitor circuit may be made relatively insensitive to the value of and changes in the effective capacitance over a range of clock frequencies. The compensation circuit may include a clock reconditioning circuit to ensure that the switched capacitor circuit is clocked at a desired duty cycle.
Owner:TELEFON AB LM ERICSSON (PUBL)

Touch screen panel and touch screen-integrated display device

Discussed is a touch screen panel including: a substrate; a first line electrode in a mesh pattern on the substrate; a plurality of first segment electrodes disposed on the first line electrode; a second line electrode in a mesh pattern on the substrate, and disconnected in an intersection area where the second line electrode is to intersect the first line electrode; a plurality of second segment electrodes disposed on the second line electrode; and a plurality of connection electrodes that connect the disconnected second line electrode in the intersection area, wherein the first and second line electrodes reduce resistance, and the first and second segment electrodes increase effective capacitance for sensing a touch to thereby reduce an RC-delay in the touch screen panel.
Owner:LG DISPLAY CO LTD

Process and system for identifying wires at risk of electromigration

A method and system of identifying one or more nets in a digital IC design that are at risk of electromigration comprises selecting a manufacturing process for the digital IC design and obtaining a clock period and process voltage. A voltage waveform transition time and effective capacitance is calculated for one or more of the nets. A maximum allowable effective capacitance for each one of the nets is calculated based upon a peak current analysis or an RMS current analysis. The effective capacitance for each net is compared against the maximum allowable capacitance to identify those nets that are at risk of failure due to the effects of electromigration.
Owner:BROADCOM INT PTE LTD

Next High Frequency Improvement by Using Frequency Dependent Effective Capacitance

A connector is provided for simultaneously improving both the NEXT high frequency performance when low crosstalk plugs are used and the NEXT low frequency performance when high crosstalk plugs are used. The connector includes a first compensation structure provided on an inner metalized layer of the PCB at a first stage area of the PCB, and a second compensation structure, provided at a second stage area of the PCB, for increasing compensation capacitance with increasing frequency.
Owner:COMMSCOPE INC

Liquid Level Determination by Capacitive Sensing

The present invention provides methods and apparatuses for determining a liquid level inside a container by using an effective capacitance associated with one or more sense electrodes that are located inside the container. Embodiments may support different types of liquids, including water, and support different electrical appliances, including electric kettles, coffee makers, and water treatment appliances having a non-transparency housing such as stainless steel and black color Lucite or glass that cannot directly indicate the water level. A value of capacitance characteristic associated with a sensing electrode is determined. The water level may be displayed to the user on any kind of electronic panel, e.g., liquid crystal display (LCD), light emitting diode (LED) display, or vacuum fluorescent display (VFD). Also, a correction factor may be applied to a determined capacitance associated with a sensing electrode to compensate for the operating temperature of the sensor electrode and the liquid.
Owner:COMPUTIME LIMITED

Capacitive touch screen with mesh-like electrodes

InactiveCN102402354AImprove waterproof performanceEnhance anti-EDS, anti-aging and other propertiesInput/output processes for data processingElectricityCapacitance
The invention relates to a capacitive touch screen with mesh-like electrodes, comprising a first electrode and a second electrode which are made of transparent conductive materials and are arranged orthogonally in a non-contact way. Particularly, at least one of the first electrode and the second electrode comprises at least two sub electrode plates, all sub electrode plates in the same electrode are distributed in a mesh-like structure, i.e. at least one of the first electrode and the second electrode is provided with at least one grid, and all the grids are enclosed by the sub electrode plates at the periphery of the grids. According to the invention, the concentrated capacitance in the prior art is improved into scattered capacitance through the mesh-like electrodes, so that even if a touch screen is hung in the air, higher effective capacitance is ensured, so that the water-proof performance of the touch screen is improved, and simultaneously the electrodynamic suspension (EDS) resistance, anti-aging and other properties of a capacitive screen are enhanced.
Owner:FOCALTECH SYST LTD
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