1522results about How to "Avoid conduction" patented technology

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.

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.

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.

Systems and methods to inhibit the conduction of certain spurious electrical impulses in the heart. Inhibition of spurious electrical impulses in the heart is accomplished by cooling one or more targeted portions of the heart. Optionally, inhibition of spurious electrical impulses may be accomplished by cooling of cardiac tissue in combination with pacing of the heart.

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.

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.

A cable television (CATV) entry adapter interfaces to a CATV network 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.

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.

A speaker (1) includes: a heat sink (13) disposed at the front of a bobbin (7); and a coupler (14) disposed between the front of the heat sink (13) and the rear of a diaphragm (11), wherein the heat sink includes: a base portion (15) having an outer circumferential wall and disposed inside the bobbin (7); and a flange portion (16) extending axially outwardly from the forefront of the outer circumferential wall and having its rear face disposed in contact with the front of the bobbin (7), and the coupler includes: a diaphragm supporting portion (17) disposed at the rear of the diaphragm; and inner and outer annular walls disposed at the diaphragm supporting portion (17), and wherein the heat sink is connected to the coupler (14) such that the base portion and the flange portion of the heat sink are connected respectively to the inner annular wall (18) and the outer annular wall (19) of the coupler.