1531results about How to "Avoid conduction" patented technology

The present invention provides improved electrosurgical instruments and systems having electrocautery energy supply conductors that provide inhibited current leakage and methods of performing a robotically controlled minimally invasive surgical procedure while preventing unintended capacitive coupling. A surgical instrument generally comprises an elongate shaft having a proximal end and a distal end and defining an internal longitudinally extending passage. An electrocautery end effector is coupled to or disposed at the distal end of the shaft. An interface or tool base is coupled to or disposed at the proximal end of the shaft and removably connectable to the robotic surgical system. Typically, an independent electrical conductor extends from the interface to the end effector to transmit electrical energy to tissue engaged by the end effector. A sealed insulation tube extends within the passage and over the conductor. A separation is maintained between the sealed insulation tube and the conductor.

Improved robotic surgery end-effectors include at least one insulation material for inhibiting surface conduction of electrical current in a proximal direction, from a distal active electrode toward the proximal end of the end-effector and toward the rest of the surgical instrument itself. Some embodiments include two layers of insulation to further prevent proximally-directed current. By inhibiting proximal current flow, the end-effectors prevent unwanted patient burns as well as electricity-related wear and tear in and around the area where the end-effector is coupled with the rest of the surgical instrument. In various embodiments, such end-effectors are preferably removably coupleable with a robotic surgical instrument.

A cable television (CATV) entry adapter interfaces to a CATV network and and serves as a hub in a Multimedia over Coax Alliance (MoCA) network. MoCA signals are bypassed around the CATV communication paths within the entry adapter to maintain adequate signal strength and to allow a passive port of the entry adapter to be used as part of the MoCA network. MoCA signals are suppressed from exiting the CATV entry adapter onto the CATV network.

Disclosed are a switch mode power amplifier and a field effect transistor especially suitable for use in a switch mode power amplifier. The transistor is preferably a compound high electron mobility transistor (HEMT) having a source terminal and a drain terminal with a gate terminal therebetween and positioned on a dielectric material. A field plate extends from the gate terminal over at least two layers of dielectric material towards the drain. The dielectric layers preferably comprise silicon oxide and silicon nitride. A third layer of silicon oxide can be provided with the layer of silicon nitride being positioned between layers of silicon oxide. Etch selectivity is utilized in etching recesses for the gate terminal.

Disclosed are a switch mode power amplifier and a field effect transistor especially suitable for use in a switch mode power amplifier. The transistor is preferably a compound high electron mobility transistor (HEMT) having a source terminal and a drain terminal with a gate terminal therebetween and positioned on a dielectric material. A field plate extends from the gate terminal over at least two layers of dielectric material towards the drain. The dielectric layers preferably comprise silicon oxide and silicon nitride. A third layer of silicon oxide can be provided with the layer of silicon nitride being positioned between layers of silicon oxide. Etch selectivity is utilized in etching recesses for the gate terminal.

A surgical instrument for use with a robotic surgical system is described. The instrument includes an elongate shaft having a proximal end and a distal end. An electrically live wrist member is disposed at the distal end of the shaft. An electrocautery end effector is mounted to the wrist member. An interface is disposed at the proximal end of the shaft. The interface is removably connectable to the robotic surgical system. A conductor extends from the interface to the end effector so as to deliver electrical energy to tissue engaged by the end effector. A tip cover is disposed over the wrist member so that electrical current can only be conducted to tissues through the exposed end effector (e.g., to promote blood coagulation during usage) and not to other parts of the patient's body.

The invention provides a non-invasive method for treatment of arrhythmia. In a first aspect, a method for treatment of atrial fibrillation in a heart of a patient comprises directing radiation from outside the patient toward one or more target treatment regions of the heart so as to inhibit the atrial fibrillation. The radiation may induce isolation of a pulmonary vein.

The invention provides a non-invasive method for treatment of arrhythmia. In a first aspect, a method for treatment of atrial fibrillation in a heart of a patient comprises directing radiation from outside the patient toward one or more target treatment regions of the heart so as to inhibit the atrial fibrillation. The radiation may induce isolation of a pulmonary vein.

A cable television (CATV) entry adapter connects to a CATV network and serves as a hub in a Multimedia over Coax Alliance (MoCA) network. MoCA signals are communicated between passive and active ports of the entry adapter through a pair of directional couplers which allow a MoCA-enabled embedded multimedia device (eMTA) at the passive port to communicate with multimedia devices of the MoCA network connected to the active ports.

A buffering member is connected between a cushion member and an air discharge duct of a blower unit to damp vibrations of the blower unit and thus to limit conduction of the vibrations from the blower unit to the cushion member. Resilient damper members are held between a connector bracket and a cover member and hold seat spring members, so that the blower unit is supported by the seat spring member. The connector bracket includes protrusions, which protrude toward the cushion member and hold the seat spring members through the resilient damper members. The cushion member includes recesses, which receive the protrusions of the connector bracket in such a manner that the protrusions are spaced from the cushion member.

An improved level shifter circuit that toggles a "flying Flip-Flop" comprising a cross-coupled inverter pair with control devices driven out of phase through a pair of cascode transistors. The cross-coupled inverter pair provides pull-up to the positive rail, clamping to a High Side-Common (HSC), and providing Hysteretic Switching. The cascode transistors restrict the pull-down of the control devices, thereby preventing continuous current conduction.

The invention provides a LED illuminating equipment with high power and high heat-dissipating efficiency. The LED illuminating equipment of the invention includes a plurality of diode light-emitting apparatuses. Particularly, the heat generated by the diode light-emitting apparatuses in operation is conducted to a heat-dissipating plate device and the heat-dissipating fins. Besides, the heat is uniformly distributed over the heat-dissipating plate device and further dissipated by the heat-dissipating plate device and the heat-dissipating fins extending thereon.

A method of making an implantable electrode array, adapted for insertion into a cochlea, includes the steps of: (a) forming electrode contact pieces made from a precious, biocompatible material into a desired shape; (b) attaching the electrode contact pieces to a foil sheet made from a non-toxic but chemically-active metal; (c) connecting a wiring system to the metal contact pieces; (d) molding a flexible polymer carrier around the electrode contact pieces and wiring system while such are held in place by the foil sheet; and (e) etching away the foil sheet, leaving the electrode contact pieces exposed at a surface of the molded polymer carrier. The exposed electrode contacts are made so as to have a shape, geometry, or makeup that aids in controlling the current flow and current density associated with the electrode contact as a function of position on the electrode contact.

An improved apparatus and method for AAC insertion including a new AAC connector having a threaded or partially threaded body. The AAC connector has a flexible flange situated at one end that is soft and thin enough to bend backwards so that it can be pushed through an opening made in the apex, but rigid enough to flex back to its original position and hold its shape once it enters the interior of the left ventricle. A second ring is also provided that is adapted to be deployed over the body of the connector and against the exterior wall of the apex.

An image server stores volume data including a plurality of tomographic images. A doctor sends transfer request of volume data through a client terminal to the image server when reading an image. Upon receiving the transfer request, a CPU of the image server refers to a doctor information DB based on a doctor ID included in the transfer request to judge a site allowed to be browsed by the doctor who has requested. Upon judging the site allowed to be browsed, the CPU refers to site information preliminarily recorded on each tomographic image of the requested volume data. Thereafter, it is determined whether the doctor who has requested is allowed to browse each of the tomographic images or not based on the site information and the site allowed to be browsed. After judging, the CPU transfers only tomographic images allowed to be browsed to the client terminal as the requester.

A DC-to-DC converter incorporates a transformer having a primary winding connected to a pair of DC input terminals via an active switch, which turns on and off under the control of a feedback circuit, and a secondary winding connected to a pair of DC output terminals via a synchronous rectifier and a smoothing capacitor. The synchronous rectifier is a parallel connection of a synchronous rectifier switch and a diode. A synchronous rectifier control circuit is connected to the synchronous rectifier switch for causing conduction therethrough while the active switch is off. The synchronous rectifier control circuit comprises a capacitor for determination of the conducting periods of the synchronous rectifier switch, and a logic network for on / off control of the synchronous rectifier switch according to whether the active switch is on or off and whether the capacitor voltage is higher than a predefined threshold or not.

The invention discloses a colored film substrate and a liquid-crystal display panel. The liquid-crystal display panel comprises the colored film substrate, an array substrate and a liquid crystal layer, wherein the array substrate is arranged oppositely to the colored film substrate, the liquid-crystal layer is arranged between the colored film substrate and the array substrate, the liquid-crystal display panel is divided into a display area and a periphery area surrounding the display area. A black matrix is arranged in the periphery area of the inner side of the colored film substrate and is provided with at least one opening arranged on at least one side of the periphery area, and the black matrix on the side of the periphery area is divided into a portion close to the display area and a portion distant from the display area by the openings; a first electrode and a second electrode are arranged on the inner side of the liquid-crystal display panel and correspond to the openings. By the aid of the openings, affection on display effect of the liquid-crystal display panel from external static electricity can be avoided; by arranging the first electrode and the second electrode corresponding to the openings, light leak of the openings can be prevented, and display effect of the liquid-crystal display panel is improved.

An electronic apparatus (1) for control or training of an animal includes a housing (2) supported by a strap against the animal's skin, first and second stimulus probes (5) connected to a surface (9) of the housing, and control circuitry in the housing including output terminals selectively producing aversive stimulus. A stabilizing member (7) is connected to a location of the surface (9) of the housing that is offset from a straight line between the first and second stimulus electrodes (5) so that conductive tips of the first and second stimulus electrodes and a tip of the stabilizing post define a triangle, whereby the conductive tips of the first and second stimulus electrodes and the tip of the stabilizing member are pressed against the skin of the animal and prevent rocking of the conductive tips of the first and second stimulus electrodes against the skin of the animal to reduce the occurrence and / or severity of skin sores.

A switched mode power supply comprises a first switch coupled to an input power source, a second switch coupled to ground, and an output filter coupled to a phase node defined between the first and second switches. The first and second switches are responsive to a pulse width modulated signal to thereby regulate power provided to the output filter. A controller is provided in a feedback loop that monitors operation of the first and second switches and delays activation of one of the first and second switches to preclude simultaneous conduction. The controller comprises at least one delay control circuit adapted to delay delivery of the pulse width modulated signal to at least one of the first and second switches. The delay control circuit detects a phase difference between state transitions of the first and second switches and provides a delay corresponding to a magnitude of the phase difference.

A cable television (CATV) entry adapter connects to a CATV network and serves as a hub in an In-Home Entertainment (IHE) network. IHE signals may be communicated between passive and active ports of an embodiment of the entry adapter through a pair of directional couplers which allow an IHE-enabled embedded multimedia terminal device (eMTA) at the passive port to communicate with multimedia devices of the IHE network connected to the active ports. An IHE frequency rejection filter is used in some embodiments to confine IHE signal to a single subscriber premise. In some embodiments a bidirectional IHE bandpass filter is used to enable IHE signals to pass between the passive and active ports of the CATV entry adapter.

A LED retrofit lamp for replacement of fluorescent lamp or tube driven by fluorescent ballast is provided. The retrofit lamp is compatible with the fluorescent ballast that requires the presence of a barrier for striking an arc voltage. The present invention provides a strike barrier—a controllable barrier that does not allow current conduction until a threshold voltage is reached. When a current above the threshold voltage passes through the strike barrier, the circuit latches and allows conduction at normal voltage. The present invention also provides a circuit that replicates the cathode heater resistance of a fluorescent lamp to rapid start and programmed start ballast.

A semiconductor package having a high quantity of input / output (I / O) connections and a fabrication method thereof are proposed. A lead frame having a plurality of leads, a die pad and at least one conductive member electrically isolated from the die pad and disposed between the die pad and leads, is provided for at least one semiconductor chip to be mounted on the die pad. The semiconductor chip is electrically connected to the leads and the at least one conductive member. An encapsulant is formed to encapsulate the semiconductor chip and a portion of the lead frame with bottom surfaces of the die pad and the at least one conductive member and a portion of the leads being exposed from the encapsulant. The at least one conductive member electrically separated from the die pad is used as an I / O connection for external connection between the semiconductor chip and external devices.

A circuit board including conductive layers bonded to both surfaces of an insulating ceramic substrate, with a brazing material disposed therebetween. The conductive layers comprise at least 99.98% by mass of aluminum, and display an average crystal grain diameter within a range from 0.5 mm to 5 mm and a standard deviation σ for that crystal grain diameter of no more than 2 mm. Each conductive layer comprises at least 20 ppm of Cu, Fe and Si. The surface area of the crystal with the maximum crystal grain diameter within the conductive layers accounts for no more than 15% of the surface area of the insulating ceramic substrate.

A spacecraft reaction control system comprising: a spacecraft having a center of mass; a length of tether extending from said spacecraft and offset from said spacecraft's center of mass and means for controllably changing said extension of said offset such that a variable force is exerted upon said spacecraft by said tether, said force being offset from said center of mass.