370 results about "Capacitive discharge" patented technology

A magnetic nerve stimulator system is comprised of a core constructed from a material having a high field saturation with a coil winding. A thyrister capacitive discharge circuit pulses the device. A rapidly changing magnetic field is guided by the core, preferably vanadium permendur. For task specific excitation of various nerve groups, specially constructed cores allow for excitation of nerves at deeper levels with higher efficiency than is possible with air-core stimulators. Among the applications possible with this invention are treatment of incontinence, rehabilitation of large muscle groups in the leg and arm, and excitation of abdominal wall muscle groups to aid in weight loss and metabolic rate increase. A C-shape is employed for focussing the stimulation as desired.

In a switching type power supply for use in an electric arc welder or plasma cutter, of the type having an output transformer with a primary winding in a series circuit DC source with a selected voltage and a switch, either single or tandem, with a conductive on state to pass a current pulse through the primary winding in a first electrical direction and a non-conductive off state disconnecting the DC voltage source from the winding and a large filter capacitor across the DC input voltage source, the improvement comprising: a snubber network for transferring energy due to the leakage inductance of the primary winding to the filter capacitor when the switch is shifted from the on state to the off state where the snubber network includes a storage capacitor with a diode controlled resonant charging circuit so the winding is in a tank circuit with the storage capacitor to charge the storage capacitor in a charging cycle when the switch shifts from the on state to the off state and a diode controlled discharging circuit where the storage capacitor is in series with the winding and the filter capacitor to discharge the storage capacitor into the filter capacitor when the winding reverses polarity.

A keyboard activates areas of a touchscreen according to user interaction with the keyboard. A discharge circuit provides a discharge path for altering the electrostatic field of the touchscreen. Such discharge circuit excludes the user's finger (or stylus). Instead of grounding to the user, a ground plane in varying embodiments may be contained within the keyboard, or be formed at least in part by by the case of the keyboard, the case of the host device, or the ground plane of the host device. The keyboard includes an electrical ground member to absorb the capacitive discharge and / or conduct such discharge to the ground plane.

In a system for chemical analysis, an RF-driven plasma ionization device including a pair of spaced-apart and plasma-isolated electrodes, the electrodes are connected to a power source wherein the electrodes act as plates of a capacitor of a resonant circuit, the gas electrically discharges and creates a plasma of both positive and negative ions, and the voltage is applied as a continuous alternating waveform or as a series of pulses, such as a packet waveform.

An apparatus and method of uniformly heating, rheologically softening, and thermoplastically forming metallic glasses rapidly into a net shape using a rapid capacitor discharge forming (RCDF) tool in combination with an electromagnetic force generated by the interaction of the applied current with a transverse magnetic field. The RCDF method utilizes the discharge of electrical energy stored in a capacitor to uniformly and rapidly heat a sample or charge of metallic glass alloy to a predetermined “process temperature” between the glass transition temperature of the amorphous metal and the equilibrium melting point of the alloy in a time scale of several milliseconds or less, at which point the interaction between the electric field and the magnetic field generates a force capable of shaping the heated sample into a high quality amorphous bulk article via any number of techniques including, for example, injection molding, dynamic forging, stamp forging, and blow molding in a time scale of less than one second.

Disclosed herein are surface-functionalized powders which alter the solidification of the melted powders. Some variations provide a powdered material comprising a plurality of particles fabricated from a first material, wherein each of the particles has a particle surface area that is continuously or intermittently surface-functionalized with nanoparticles and / or microparticles selected to control solidification of the powdered material from a liquid state to a solid state. Other variations provide a method of controlling solidification of a powdered material, comprising melting at least a portion of the powdered material to a liquid state, and semi-passively controlling solidification of the powdered material from the liquid state to a solid state. Several techniques for semi-passive control are described in detail. The methods may further include creating a structure through one or more techniques selected from additive manufacturing, injection molding, pressing and sintering, capacitive discharge sintering, or spark plasma sintering.

Rapid shaft stop devices and transmissions are described that utilize permanent magnets for coupling and / or braking and are useful for electronic propeller guards and other equipment. In an embodiment, one or more capacitive discharge pulses are used to rapidly stop a shaft. A magnetic transmission is provided having axially oriented magnets on each side of an air space junction that transmit torque across the junction with a torque / speed profile that particularly suits boat propellers. The junction may include a bearing and allows slippage when the propeller resistance exceeds a given value. This slippage acts as a variable gear reduction. One or more electromagnets may be energized and thereby add to or subtract from one or more magnetic fields and provide electronic control of torque and of gear reduction ratio for devices such as watercraft drive systems.

Neurostimulators for application of transdermal electrical stimulation (TES) and methods of using them for comfortably inducing a cognitive effect. The apparatuses described herein may include hardware, software and / or firmware components that are configured to safely and effectively apply high current intensity (e.g., using a high voltage source). These apparatuses may also include circuitry configured to deliver complex (e.g., ensemble) TES current waveforms that incorporate capacitive discharge current at selected portions of the delivered waveform to enhance user comfort. Methods of operating these devices to reduce capacitance buildup on the user's skin by delivering integrated capacitive discharging currents are also included.

A memory system includes a substrate, control circuitry on the substrate, a three dimensional memory array (above the substrate) that includes a plurality of memory cells with reversible resistance-switching elements, and circuits for limiting the SET current for the reversible resistance-switching elements. The circuits for limiting the SET current provide a charge on one or more bit lines that is not sufficient to SET the memory cells, and then discharge the bit lines through the memory cells in order to SET the memory cells.

Rapid shaft stop devices and transmissions are described that utilize permanent magnets for coupling and / or braking and are useful for electronic propeller guards and other equipment. In an embodiment, one or more capacitive discharge pulses are used to rapidly stop a shaft. A magnetic transmission is provided having axially oriented magnets on each side of an air space junction that transmit torque across the junction with a torque / speed profile that particularly suits boat propellers. The junction may include a bearing and allows slippage when the propeller resistance exceeds a given value. This slippage acts as a variable gear reduction. One or more electromagnets may be energized and thereby add to or subtract from one or more magnetic fields and provide electronic control of torque and of gear reduction ratio for devices such as watercraft drive systems.

Methods and apparatus for treating fibrillation utilize biphasic waveforms. A cardiac stimulator includes a defibrillation circuit that uses a pulse width modulated capacitive discharge to generate various biphasic waveforms, one or more of which may be delivered to the heart to treat the fibrillation.

The invention discloses a translation register for a grid driver, which comprises a drive transistor, a reset transistor, a charge and discharge circuit, a threshold voltage detection circuit and a storage capacitor. The threshold voltage detection circuit is used for detecting the initial threshold voltage of the drive transistor and storing the initial threshold voltage in the capacitor. The charge and discharge circuit can charge and discharge the capacitor and receive a control signal to start the translation register. The reset transistor can receive an output signal of a translation register of the next stage to discharge the capacitor and to reset the translation register in the initial state. Thus, the drive current output by the translation register is dissociated from the threshold voltage of the drive transistor.

The present invention provides a high voltage, step-up, high current DC pulse type transformer with increased coupling coefficient between the primary and secondary windings through close proximity of the primary winding turns and secondary winding turns by means of transformer construction that provides a plurality of winding bays for a high voltage secondary winding physically located in close proximity to the primary winding. The plurality of winding bays for the secondary winding are provided by means of a frame and separate thin insulation layer where the thin insulation layer provides the barrel for all or part of the secondary winding. The invention significantly increases the transformer's coupling coefficient in high voltage step-up transformer applications where the transformer's core is pushed beyond saturation due to the high peak current typically found in capacitive discharge type circuits such as those used in electric fence controllers, strobe circuits, and high performance ignition systems for automobile, marine, or motorcycle engines.

The invention discloses a pixel circuit and a driving method, a display panel and a display device of the pixel circuit, wherein the driving method, the display panel and the display device are used for prolonging the service life of the pixel circuit. The pixel circuit comprises a charging sub circuit, a capacitor, a first driving sub circuit and a second sub driving circuit; the first end of the capacitor is connected with the first ends of the first driving sub circuit and the second driving sub circuit, and the second end of the capacitor is connected with the charging sub circuit; the second end of the first driving sub circuit is connected with a first light emitting device, and the second end of the second driving sub circuit is connected with a second light emitting device, wherein the direction of the driving current flowing from the first driving sub circuit to the first light emitting device is opposite to that flowing from the second driving sub circuit to the second light emitting device; the charging sub circuit is used for charging the capacitor; the capacitor discharges to enable the first driving sub circuit to drive the first light emitting device to light or the second driving sub circuit to drive the second light emitting device to light.

The present invention provides an apparatus and a method of generating and controlling plasma formed in a capacitively coupled plasma region between a plasma electrode and a bias electrode. The plasma electrode includes a plurality of sub-electrodes that are electrically insulated from one another. Radio frequency plasma generating electric power is provided to the plasma electrode. Radio frequency bias electric power, at a lower frequency than the plasma generating radio frequency electric power, is also provided. A first portion of the bias electric power is provided to the bias electrode, and a second portion of the bias electric power is provided to the plasma electrode. At least one filter, impedance matching network, phase shifter, and power splitter are used to affect the electric power provided to the electrodes.

A tooling method for calibrating a partially formed metal part in an electro-hydraulic forming tool. The method includes loading a partially formed metal part onto a forming surface of a die. The part is then clamped onto the forming surface and the part is pulsed with a high rate energy pulse to overcome a spring-back effect in the part. The EHF calibration tool includes a punch to which a part is held by clamps while a capacitive discharge circuit is discharged through electrodes provided in the tool. Upon discharge of the capacitive discharge circuit through the electrodes, a high rate energy pulse is applied through a liquid to calibrate the part.

A general method of manufacturing high strength ultrafine grained nanostructured carbon and carbide materials that combines densification of nanoparticles with heat treatments or other means of supplying energy to cause fusion of structures that interlink and weld the nanoparticles together. Coatings films, nanopaper, nanopaper laminates, fibers, and extended objects can be manufactured by applying the disclosed methods. The nanomaterials are useful for additive manufacturing of rapid prototyped objects. A variety of nanoparticle starting materials are divulged including but not limited to double walled carbon nanotubes, fluorinated graphene nanosheets, silicon nanowires, and boron nanoplatelets. Articles can be manufactured with spark plasma synthesis, capacitive discharge sintering, hot press apparatus and green bodies can be processed in furnaces. The nanomaterials and ultra high strength articles manufactured from them will have applications including laparoscopic instruments, structural composites, heat sinks, EMI shielding, ballistic protection and aerospace components.

A capacitive discharge ignition (CDI) system that can be used with a variety of light-duty internal combustion engines, including those typically employed by lawn, garden, and other outdoor equipment. According to one embodiment, the CDI system includes an ignition module having a first switching device that shorts a charge coil during an initial portion of a charge cycle. Subsequently, the first switching device is turned ‘off’ so that a flyback charging technique charges an ignition capacitor. A second switching device is then used to discharge the ignition capacitor and initiate the combustion process.

The invention discloses an X capacitor discharge control circuit used in a switching power supply. An X capacitor is discharged by a switching circuit formed by a depletion transistor and a second switching tube. Currently-sampled input voltage information is compared with input voltage information sampled and held in the last cycle and whether an input end is powered down is determined according to a compared result. When power down happens, the second switching tube is controlled to be switched on in order to discharge the X capacitor. In another aspect, the depletion transistor can be multiplexed in order that a power supply capacitor is charged by input-end voltage, thereby achieving high-voltage quick start of the control chip of the switching power supply.

Carbon fouling adhered on an insulator tip of a spark plug of the present invention is burnt down by a leak current during an inductive discharge period, due to a promoted ionization before beginning a capacitive discharge, in such an arrangement of a central electrode that a border portion of a body and narrowed portion is positioned in an insulator. The carbon burning-down effect is further improved by a narrow projection provided with an earth electrode, due to increased inductive energy and extended inductive discharge time period. This is because an electric field in a discharge gap is raised, thereby decreasing a discharge voltage and suppressing an energy emitted from a coil during the capacitive discharge.

The present invention provides a low duty cycle, high current DC pulse type transformer with increased coupling coefficient between the primary and secondary windings by changing the proximity of the primary windings to the secondary windings through a plurality of primary windings separated by layers of secondary windings thus reducing the average distance between the primary windings and secondary windings. In addition to the increased coupling coefficient, the invention provides a reduction in electrical potential between primary windings and secondary windings through an electrical connection between the primary winding and a tap within the secondary winding. The invention significantly increases the coupling coefficient in applications where the transformer's core becomes saturated due to the high peak current typically found in capacitive discharge type circuits such as those used in electric fence controllers, strobe circuits, and high performance ignition systems for automobile, marine, or motorcycle engines.

The invention provides a self-capacitance touch sensing device capable of reducing substrate capacitance. The self-capacitance touch sensing device capable of reducing the substrate capacitance comprises a self-capacitance touch screen and a signal processing module. The signal processing module comprises an integrated operational amplifier, a feedback capacitor, a substrate capacitor and a controlled switch. The reverse-phase input end of the integrated operational amplifier is electrically connected with a channel capacitor. By the adoption of the self-capacitance touch sensing device capable of reducing the substrate capacitance, in the pre-discharge stage, the channel capacitor is made to discharge electricity, and at least one of the substrate capacitor and the feedback capacitor is charged; in the sensing stage, the channel capacitor is charged, and the charge variable quantity, caused by touch, of a branch where the channel capacitor is located is output from the output end of the integrated operational amplifier. According to the self-capacitance touch sensing device capable of reducing the substrate capacitance, the charge mode of the substrate capacitor is changed through pre-storing of electric charge on the feedback capacitor, the quantity of electric charge which can be provided by the substrate capacitor is increased, and then the substrate capacitance is reduced; in this way, the area of a chip is reduced, process cost is reduced, and the self-capacitance touch sensing device can be lighter and thinner.

An electromagnetic pulse delivery system for delivering a sufficient amount of energy and waveform to induce a current in target electronic components that disrupt or damage those target electronic components and overwhelm any protective circuitry. The system includes a power source in communication with a capacitive discharge system capable of producing an electromagnetic pulse. A mechanical interface including a supply contact in communication with the capacitive discharge system and a return contact in communication with a path to earth ground is provided to deliver the electromagnetic pulse to the target object. Physical contact between the mechanical interface and the object closes a switch disposed between the capacitive discharge system and the supply contact for discharging the pulse into the target object.

The invention relates to an ignition control system of a tube furnace. The system comprises a high-energy ignition device, a burner, an automatic ignition control system and a burning control system, wherein the high-energy ignition device adopts a capacitive discharge type igniter capable of providing the safe and reliable ignition performance; the burner is provided with a flame detection device and can realize the regulation of burning-supporting air and fuel in certain proportion; and the automatic ignition control system has the functions of flame detection, safety protection of the furnace and self diagnosis. The invention has the advantages of high heat efficiency, safety and reliability, stable and controllable burning, energy saving and emission reduction.

An aircraft ignition system having a power circuit, a control circuit, and a discharge circuit and coupled to the spark plugs of an aircraft engine. The power circuit may include two independent power sources; e.g., alternator power (such as a permanent magnet alternator) and power from aircraft or DC power bus. The control circuit may control one or more aspects of the discharge circuit, e.g., the ignition timing. And the discharge circuit may trigger a capacitive discharge ignition event to the spark plugs.

Capacitive discharge system for ignitors of internal combustion engines with one ignition coil (T) per ignitor with one or more capacitors (6) and shunt switch means (5) associated with each such coil, together forming a coil primary ignition circuit of Type II topology and resonance oscillation capability, each switch means being a series combination of shunt diode (D) means and switch (SD) across the coils primary winding, with a voltage drop element (Vdb) across switch SD, the system constructed to produce capacitive ignition initial spark discharge of duration less than a quarter period of the resonance oscillation of the primary ignition circuit followed by an essentially triangular distribution decaying spark discharge of longer duration than the initial discharge, with switch SD to be turned off near or after spark circuit zero to divert residual primary discharge circuit through the voltage drop element.