14737 results about "Voltage source" patented technology

A working end of a surgical instrument that carries first and second jaws for delivering energy to tissue. In a preferred embodiment, at least one jaw of the working end defines a tissue-engagement plane that contacts the targeted tissue. The cross-section of the engagement plane reveals that it defines (i) a first surface conductive portion or a variably resistive matrix of a temperature-sensitive resistive material or a pressure-sensitive resistive material, and (ii) a second surface portion coupled to a fixed resistive material that coupled in series or parallel to a voltage source together with the first portion. In use, the engagement plane will apply active Rf energy to ohmically heat the captured tissue until the point in time that a controller senses an electrical parameter of the tissue such as impedance. Thereafter, the controller switches energy delivery to the second surface portion that is resistively heated to thereby apply energy to tissue by conductive heat transfer.

A method and system for applying addressing voltages to pixels of a display involves receiving input data. The input data includes an indication of an addressing voltage impulse to be applied to a pixel via an electrode. One or more voltage sources are selected, to provide the addressing voltage impulse. The one or more voltage sources each have a pre-selected voltage. The selected one or more voltage sources are electrically connected to an electrode to apply the addressing voltage impulse to the pixel.

An in vivo biosensor disposed upon a subject comprising an electrochemical cell having a plurality of electrodes and a computer-controlled voltage source incorporating a potentiostat that is generative of a poise potential regime, which computer-controlled voltage source is operationally coupled to a computing device that: computes an output current whose magnitude is proportional to an amount of an analyte in a bodily fluid of the subject; and, adjusts the output current for drift due to biofouling at points in time greater than or equal to an induction period; and, outputs the amount of the analyte by transducing the adjusted output current. Methods and algorithms for adjusting the output current for drift due to biofouling are provided.

A data path for coupling data between a memory cell and an input / output (IO) line sense amplifier. An IO line coupling circuit is coupled to a pair of global data lines and a pair of local data lines to couple and decouple each of the global data lines to and from a voltage supply based on the voltage levels of the local data lines for the memory read operation. For the memory write operation, the IO line coupling circuit couples and decouples each of the global data lines to and from a respective one of the local data lines. The data path also includes a first precharge circuit coupled to the global data lines to couple the global data lines to ground to precharge the signal lines prior to a memory read or write operation, and can further include a test compression circuit coupled to the global data lines.

A MEMS SLM and an electrostatic actuator associated with a pixel in an SLM. The actuator has three electrodes: a lower electrode; an upper electrode fixed with respect to the lower electrode; and a center electrode suspended and actuable between the upper and lower electrodes. The center electrode is capable of resiliently-biasing to restore the center electrode to a non-actuated first equilibrium position, and a mirror is operably connected to the center electrode. A first voltage source provides a first bias voltage across the lower and center electrodes and a second voltage source provides a second bias voltage across the upper and center electrodes, with the first and second bias voltages determining the non-actuated first equilibrium position of the center electrode. A third voltage source provides a variable driver voltage across one of the lower / center and upper / center electrode pairs in series with the corresponding first or second bias voltage, to actuate the center electrode to a dynamic second equilibrium position.

A photo-therapy device emits photo-therapeutic radiation to treat. living tissue. The device incorporates an array of emitters, the photo emissions of which is dependent on their temperature. Temperature feedback is provided to a voltage supply that supplies current to the emitters, to regulate the voltage supply level and the temperature of the emitters. Additionally, the wavelength of the radiation is dependent on the temperature of the emitters, so the wavelength is moved closer to an optimum wavelength for absorption by the tissue by controlling the temperature of the emitters. Furthermore, the useful life of the emitters is extended by pulsing the emitters on and off by sequentially applying an activation signal to one group of emitters at a time. Also, the device can operate on a wide range of voltage input levels since it utilizes a switching regulator, which can convert a voltage level in the range to the level required to drive the array of emitters. The photo-therapeutic infrared light may be used to treat insect bites and to relieve headaches in human beings. The infrared light emitters may be incorporated into a mouthpiece for treating gum tissues.

A method and apparatus for power throttling in a microprocessor. A voltage source supplies voltage to the microprocessor, and a clock source operates the microprocessor at a desired frequency. In one embodiment, a power monitor is configured to measure the short term power consumption of the microprocessor. In another embodiment, a temperature sensor measures the temperature of the microprocessor. Control logic is coupled to the voltage source and the clock source. The control logic receives an indication of the power consumption or temperature, as applicable, and compares it to a predetermined value. In response to the comparison, the control logic varies the supply voltage and the frequency.

A device for the location and catheterization of the surrounding area of a nerve of a human or animal body, including a catheter and an electrically conducting puncture needle with proximal and distal ends, which puncture needle forms a continuous lumen with its proximal and distal end open and having an inside diameter which at least corresponds to the outside diameter of the catheter and which, in the region of its proximal end, is equipped with an electrical connecting part for the connection of the puncture needle to an electrical voltage source. At the proximal end, a connecting element with a through-hole communicating with the lumen is provided, onto which an injection tube for the introduction of a liquid through the through-hole into the lumen of the puncture needle is connected, and through the through-hole of which the catheter can be pushed forward into the lumen of the puncture needle all the way to the distal end thereof. Also disclosed is a method for the location and catheterization of the surrounding area of a nerve using such a device.

A method and system for applying addressing voltages to pixels of a display involves receiving input data. The input data includes an indication of an addressing voltage impulse to be applied to a pixel via an electrode. One or more voltage sources are selected, to provide the addressing voltage impulse. The one or more voltage sources each have a pre-selected voltage, The selected one or more voltage sources are electrically connected to an electrode to apply the addressing voltage impulse to the pixel. The invention also provides a method of driving an electro-optic display which uses an intermediate image of reduced bit depth, and a method of driving an electro-optic display which uses a limited number of differing drive voltages, with higher voltage pulses being used before lower voltage pulses.

An electrosurgical instrument with a disposable electrosurgical cartridge is provided. The cartridge has first and second energy-delivery surfaces that carry first and second opposing polarity conductors coupled to a voltage source, together with first and second temperature-responsive variable impedance bodies exposed partly in the respective-delivery surfaces. The cartridge further carries a slidable blade member. The temperature-responsive variable impedance bodies are coupled to the voltage source by series and parallel circuitry. In use, the variable impedance bodies are adapted to modulate current flow and ohmic heating in engaged tissue by providing controlled current paths in the tissue and through the variable impedance bodies as the temperature-responsive bodies sense the temperature of adjacent engaged tissue. The engagement surfaces are capable of highly localized modulation of Rf energy application to engage engaged tissue to provide high and low temperatures, voltage and current in the tissue to create high strength welds.

Disclosed are a method and apparatus that use an electric field for improved biological assays. The electric field is applied across a device having wells, which receive reactants, which carry a charge. The device thus uses a controllable voltage source between the first and second electrodes, which is controllable to provide a positive charge and a negative charge to a given electrode. By controlled use of the electric field charged species in a fluid in a fluid channel are directed into or out of the well by an electric field between the electrodes. The present method involves the transport of fluids, as in a microfluidic device, and the electric field-induced movement of reactive species according to various assay procedures, such as DNA sequencing, synthesis or the like.

The invention relates to an interfacing device for pseudo-differential transmission through interconnections used for sending a plurality of electrical signals. The interfacing device of the invention includes signal terminals and a common terminal. A transmitting circuit receives the input signals of the transmitting circuit coming from a source. The output of the transmitting circuit delivers, when the transmitting circuit is in the activated state, voltages between one of the signal terminals and the reference terminal (ground). A receiving circuit delivers, when the receiving circuit is in the activated state, output signals of the receiving circuit determined each by the voltage between one of the signal terminals and the common terminal, to the destination. In the closed state, the common terminal switching circuit is, for the common terminal, equivalent to a voltage source delivering a constant voltage, connected in series with a passive two-terminal circuit element presenting a low impedance.

A mass spectrometer is configured with individual multipole ion guides, configured in an assembly in alignment along a common centerline wherein at least a portion of at least one multipole ion guide mounted in the assembly resides in a vacuum region with higher background pressure, and the other portion resides in a vacuum region with lower background pressure. Said multipole ion guides are operated in mass to charge selection and ion fragmentation modes, in either a high or low pressure region, said region being selected according to the optimum pressure or pressure gradient for the function performed. The diameter, lengths and applied frequencies and phases on these contiguous ion guides may be the same or may differ. A variety of MS and MS / MSn analysis functions can be achieved using a series of contiguous multipole ion guides operating in either higher background vacuum pressures, or along pressure gradients in the region where the pressure drops from high to low pressure, or in low pressure regions. Individual sets of RF, + / −DC and resonant frequency waveform voltage supplies provide potentials to the rods of each multipole ion guide allowing the operation of ion transmission, ion trapping, mass to charge selection and ion fragmentation functions independently in each ion guide. The presence of background pressure maintained sufficiently high to cause ion to neutral gas collisions along a portion of each multiple ion guide linear assembly allows the conducting of Collisional Induced Dissociation (CID) fragmentation of ions by axially accelerating ions from one multipole ion guide into an adjacent ion guide. Alternatively ions can be fragmented in one or more multipole ion guides using resonant frequency excitation CID. A multiple multipole ion guide assembly can be configured as the primary mass analyzer in single or triple quadrupole mass analyzers with or without mass selective axial ejection. Alternatively, the multiple multipole ion guide linear assembly can be configured as part of a hybrid Time-Of-Flight, Magnetic Sector, Ion Trap or Fourier Transform mass analyzer.

A power scavenging device attaches to an overhead power cable and a support pole. The power scavenging device includes a non-conducting outer body and a first capacitor and a second capacitor that are connected in series forming a voltage divider. A voltage source converter is electrically connected to the output of the power scavenging device. The voltage source converter outputs a regulated power.

An organic light-emitting diode display device includes a first switch element turned-on in response to a first scanning signal during a first period to supply a data to a first node, and then maintaining an off-state during a second period, a driving device adjusting a current through an organic light-emitting diode element in accordance with a voltage of the first node; a reference voltage source providing a reference voltage that is capable of turning-off the driving device, a second switch element maintaining an off-state during the first period, and turned-on during the second period to supply the reference voltage to the first node, and a storage capacitor maintaining the voltage at the first node.

Provided are high-resolution electrohydrodynamic inkjet (e-jet) printing systems and related methods for printing functional materials on a substrate surface. In an embodiment, a nozzle with an ejection orifice that dispenses a printing fluid faces a surface that is to be printed. The nozzle is electrically connected to a voltage source that applies an electric charge to the fluid in the nozzle to controllably deposit the printing fluid on the surface. In an aspect, a nozzle that dispenses printing fluid has a small ejection orifice, such as an orifice with an area less than 700 μm2 and is capable of printing nanofeatures or microfeatures. In an embodiment the nozzle is an integrated-electrode nozzle system that is directly connected to an electrode and a counter-electrode. The systems and methods provide printing resolutions that can encompass the sub-micron range.

A reduced size and complexity multi-mode electric vehicle charging station is provided which allows a user to select AC and DC powerform output and may provide those outputs to connectors for charging electric vehicles. A voltage source is provided to a DC converter that then outputs to a DC bus or electrical connection. The DC bus may be accessed by DC charging equipment or a DC-AC inverter that is connected to AC charging equipment, thereby providing DC and AC charging ability. In one aspect, the multi-mode electric vehicle charging station is used in a rescue vehicle for charging stranded EVs via multiple charging standards without requiring the rescue vehicle to carry independent charging systems for each charging standard. In another aspect, the charging station is used in a stationary charging station to reduce cost and complexity of using multiple independent charging systems.

An ultrasonic medical treatment device has a casing, an elongate probe, a transducer assembly, a sheath and at least one electrode member. The probe is mounted to and extends from the casing and has an axis and a free end serving as an operative tip. The transducer assembly is mounted to the casing and is operatively connected to the probe for generating vibrations of at least one ultrasonic frequency in the probe. The sheath surrounds the probe. The electrode member is connectable to an RF voltage source and is mounted at least indirectly to the casing so as to permit relative motion between the electrode member and the probe.

The present invention provides an apparatus and method for making an apparatus for sensing and / or characterizing a biopolymer translocating a nanopore. The apparatus of the present invention provides a first electrode, a first insulator, a second electrode, a optional insulator, a voltage source for applying a time varying potential difference between the electrodes, and a means of measuring the resulting current between the two electrodes. A method for making the apparatus is also disclosed.

A backplane for an electro-optic display comprises a pixel electrode (104), a voltage supply line (C) arranged to supply a voltage to the pixel electrode (104), and a micromechanical switch (106, 112) disposed between the voltage supply line (C) and the pixel electrode (104), the micromechanical switch (106, 112) having an open state, in which the voltage supply line (C) is not electrically connected to the pixel electrode (104), and a closed state, in which the voltage supply line (C) is electrically connected to the pixel electrode (104).

Systems for displaying images are provided. A representative system incorporates a display device that includes a data line operative to provide display signals and sweep signals; a scan line operative to provide scan reset signals; a first capacitor having a first end coupled to the data line for storing charges from the signal line; a first inversion unit having an input end coupled to a second end of the first capacitor, a first supply end coupled to a first voltage source, a second supply end coupled to a second voltage source larger than the first voltage, and an output end; a first reset switch having a first end coupled between the second end of the first capacitor and the input end of the first inversion unit, a second end coupled to the output end of the first inversion unit, and a control end coupled to the scan line; a driving TFT having a control end coupled to the output end of the first inversion unit; and an illuminating unit coupled between a first end of the driving TFT and a third voltage source larger than or equal to the first voltage source.

A system supplies electrical power to a remote electrical device. The system includes an AC / DC voltage converter coupled to the AC voltage source for converting an AC voltage from the AC voltage source to a high DC voltage output at a first location. The AC / DC voltage converter comprises a plurality of AC / DC voltage converter components which, on the input side thereof, are connected in parallel with the AC voltage source and which, on the output side thereof, are connected serially to an electric conductor. The electric conductor extends to a plurality of voltage converters at a remote location having inputs connected serially to the electrical conductor and having outputs providing an appropriate voltage to the electrical device, the plurality of voltage converters converting the high DC voltage to either a lower DC voltage or an alternating voyage without a cooling mechanism that would otherwise be needed when less than the plurality of voltage converters are implemented to convert the high DC voltage to the lower DC voltage or alternating voltage.

In a circuit apparatus for transformerless conversion of an electric direct voltage of a two-pole direct voltage source (1) connected to ground having a first voltage pole (+) and a second voltage pole (−) into an alternating voltage, hazardous capacitive leakage currents are avoided by connecting the direct voltage source (1) to ground and the DC-AC converter (400) is operated at a controlled intermediate circuit voltage, a DC-DC converter stage (300) being connected between the direct voltage source (1) and the DC-AC converter (400), said DC-DC converter stage providing at its output a + / − voltage that is symmetrical with respect to the grounding point, two series-connected capacitors (41, 42) having the same polarity and being connected to ground at their connecting point (V) and controlled are charged by two buck-boost choppers (100, 200) connected one behind the other.

The EL display apparatus according to this invention is provided with an EL light emitting element, a current driving device for driving the EL light emitting element by a current responsive to a source signal represented by a current, and a signal current source (634) for outputting the source signal in response to image signal to the current driving device via a source signal line, the EL display apparatus being further provided with a precharge voltage source (631) for outputting a predetermined voltage and a switching and connecting unit (636, 637) capable of selectively connecting either the signal current source or the precharge voltage source to the source signal line (638).

The invention relates to a device for measuring current in an inductor, which device is intended to be connected in parallel with said inductor, comprising two terminals A and B. The device comprises: a network in parallel with the inductor and connected to the terminals A and B having a resistor R2 in series with a resistor R1 in parallel with a capacitor C1; a voltage offset circuit having a DC voltage generator E connected in parallel with an offset resistor (Roffset) in series with two resistors in parallel R3 and R4, the positive pole of this voltage source being connected to terminal B of the inductor; a temperature compensation circuit comprising a current source controlled as a function of the temperature, one of the two terminals of the current source being connected to the negative pole of the generator E, the other terminal of the current source being connected to different points of the measurement device according to the direction of variation of the current of the source as a function of the temperature. The measurement of voltage Vmes, the image of the current I in the inductor 12, is performed between the common point between the resistors R1, R2 of the network and the common point between the offset resistor and the two resistors R3 and R4.