52results about "Resistor electrostatic/electromagnetic shielding" patented technology

A resistor having a diffused impurity region in a semiconductor substrate, an insulated gate surrounding and defining the resistor, and a pair of separated conductive contacts to the diffused region within the boundary of the insulated gate for applying and receiving current passing through the resistor.

The voltage limiter is used to effectively limit short-term and long-term overvoltages. Said voltage limiter has a varistor (1) and a discharge path which can be connected in parallel with the varistor. The discharge path contains a switching point (4), which is preferably in the form of a semiconductor switch and can be loaded with an uninterrupted current, and which can be closed above a limit value of a signal which is dependent on an operating variable of the varistor (1). The varistor (1) is arranged in a first area (24) and the switching point (4) is arranged in a second area (26) of two areas (24, 26, 28) which are at an axial distance from one another in the direction of an axis of symmetry (20). Means (5) for operating the switching point (4) are accommodated in a third area (28), which is at a defined potential. The arrangement of the components (1, 4, 5) of the voltage limiter in separate areas (24, 26, 28) results in a compact, modular construction, and those components of the voltage limiter which are subject to power loading, namely the varistor (1) and the switching point (5), are physically separated from one another, so that they can be cooled independently of one another. Since the operating means (5), which generally operate electronically, are accommodated in an electromagnetically shielded area (28), the operational reliability of the voltage limiter is at the same time improved, and, in particular, undesirable high-energy electromagnetic interference is kept away from this area (28).

An operation member includes a body having an operating end and a coupling end, and a skirt member. The skirt member is arranged at the coupling end. The skirt member includes a base plate outwardly extending from the coupling end, a wall extending from the base plate, and a groove defined between the outer surface of the wall and the body. The electronic device includes a casing, an operation member, and a circuit module. The casing has portions defining an opening. The circuit module has a circuit board including a controller disposed thereon. The above-mentioned operation member is sleeved onto the controller and passes through the opening. The outer surface of the operation member and the opening define a gap therebetween. The groove is correspondingly arranged proximate to the gap to gather small particles entering the gap.

A chip-shaped electronic part includes: a substrate; a pair of upper surface electrodes formed on an upper surface of the substrate; a functional element formed to be electrically connected to the upper surface electrode pair; a pair of lower surface electrodes formed on a lower surface of the substrate at positions opposing the upper surface electrode pair; a pair of end surface electrodes formed on end surfaces of the substrate so that each of the end surface electrode pair is electrically connected to one of the upper surface electrode pair, and to one of the lower surface electrode pair corresponding to the one upper surface electrode; a protective film formed in such a manner as to cover at least the functional element; and a plated layer formed in such a manner as to cover at least each of the upper surface electrode pair, wherein the protective film or the plated layer has at least two points of application at which a load from above the substrate is exerted.

The present invention provides a high-value resistor that can implement complete equal-potential shielding and a voltage divider based on the high-value resistor, in order to solve the problem that leakage current still exists between the high-value resistor and the shielding layer in the prior art. The high-value resistor comprises a resistor and an insulating layer and a shielding layer that are arranged orderly from interior to exterior around the resistor; wherein, the same voltage is applied between the ends of the resistor and the ends of the shielding layer. With the technical scheme of the present invention, the voltage drop on the high-value resistor is identical to the voltage drop on the shielding layer, and therefore leakage current exists between the high-voltage resistor and the shielding layer. In that way, the problem described above in the prior art is solved. A plurality of high-value resistors provided in the present invention can form voltage dividers with different ratios.

An article of manufacture having an in-molded capacitive switch and method of making the same are shown and described. In one disclosed method, a conductive ink sensing zone is printed on a film. The film is formed to a desired shape and put in an injection mold. A molten plastic material is introduced into the injection mold to form a rigid structure that retains the film.

A resistor 1 is used in high-fidelity amplifiers for audio equipment. The resistor 1 includes a cylindrical resistor body 2, a tubular sheath 3 into which the resistor body 2 is coaxially inserted, and a conductive film portion 31a formed on the inside surface 3a of the sheath 3. The conductive film portion 31a faces to a resistance film 22 covering the surface of the resistor body 2 with an annular space 6. An insulating slit 32 is formed at a central point along the resistor axis 1a, separating the conductive film 31 into left and right parts that are electrically isolated from each other. The sheath covering the resistor body 2 prevents distortion of signals in the resistance film 22 caused by extraneous electrostatic induction charges.

Disclosed is a PTC (Positive Temperature Coefficient) current limiting device for limiting a current by use of PTC characteristics, which includes a PTC element having the PTC characteristics; a pair of electrode units arranged on both sides to face each other with the PTC element being interposed therebetween; and a molding part prepared around the PTC element and the electrode units to surround at least an interface region between the PTC element and the electrode units, the molding part being made of elastic insulating material. The molding part is made of an elastic insulating material or any insulating materials selected from vacuum, gas and oil. Thus, this device may effectively restrain an arc generated while limiting overcurrent or short circuit current, and also prevent flashover between electrodes.

A high-voltage resistor element which is superior to heat resistance, dielectric breakdown strength, vibration resistance and durability performance, and is advantageous to maintenance, inspection, adjustment, replacement and repair, is made up of: a cylindrical outer tube made of metal; a resistive heat-generating wire in a coiled shape tensionally extending between inner ends of electrode rods inserted respectively from both ends of the outer tube; an insulating material filing up a space between the resistive heat-generating wire with the electrode rods and the internal surface of the outer tube and fired; and insulating sleeves extractably encasing and anchored in the portions adjacent to the both ends of the outer tube penetratingly bridging between arrangement boards.

Disclosed is an antistatic composition comprising a base resin comprising polyethylene or ethylene copolymers, an ethylene copolymer comprising amine-reactive sites and a polyetheramine and articles thereof. The ethylene copolymer comprising amine-reactive sites and the polyetheramine react to provide a graft copolymer.

The invention relates to a lightning arrester with a voltage monitoring interface. The lightning arrester comprises a base, voltage sharing covers, a shielding ring, silicone rubber umbrella skirts and wiring terminals, the silicone rubber umbrella skirts are connected with the top of the base by the shielding ring and are arranged at equal distance, the voltage sharing covers are fixedly arrangedat the tops of the silicone rubber umbrella skirts, each wiring terminal is connected with one side, far away from the base, of one end of each voltage sharing cover, a capacitance voltage sharing sleeve is connected with the bottom of each voltage sharing cover and is arranged in the silicone rubber umbrella skits, a valve is arranged at a position, near to the center of the voltage sharing cover, of one side of the capacitance voltage sharing sleeve, the voltage monitoring interface is connected with one side of the valve, penetrates through the capacitance voltage sharing sleeve and extends onto an outer wall of the silicone rubber umbrella skirt, a main capacitor and a voltage division capacitor are connected with one end of the voltage monitoring interface and extend to the capacitance voltage division sleeve, and the voltage monitoring interface and the capacitance voltage sleeve are fixedly connected by a sleeve flange. A true and effective voltage signal is provided, a voltageinterface is provided for local discharging monitoring and overvoltage monitoring, voltage division protection is improved, and the safety can be improved.

An ultra wideband frequency compensated resistor and related methodologies for frequency compensation are disclosed. In exemplary configuration, a resistive layer is provided over a substrate, and a frequency compensating structure is provided over at least a portion of the resistive layer and separated therefrom by an insulative layer. In certain embodiments, the insulating layer may be an adhesive that may also be effective to secure a protective cover over the resistive material and supporting substrate. In selected embodiments, the frequency compensating structure corresponds to a plurality of conductive layers, one or more of which may be directly electrically connected to terminations for the resistive material while one or more of the conductive layers are not so connected.

A ball grid array resistor network that has a ground plane to reduce noise and improve signal integrity. The ball grid array resistor network includes a substrate having a first and a second surface and vias that extending through the substrate between the first and second surfaces. Resistors are located on the first surface between the vias. Conductors are located over the vias and are electrically connected to ends of the resistors. A cover coat covers the conductors and resistors. A ground plane is located on the second surface. An insulating layer is located over the ground plane. Ball pads are located over the vias. The ball pads are electrically connected to the vias. Solder spheres are attached to the ball pads.

Provided is a chip-like electric component, such as a chip resistor, which is easily manufactured even without increasing cost and eliminates cracks and breakage of an insulating substrate. A pair of surface electrodes (21, 23) are formed such that the thickness increases from a resistive layer (13) toward a pair of ends (30) of an insulating substrate (29) positioned in a direction where the pair of surface electrodes (21, 23) are arranged. A plating accumulating section (S) is formed between the surface electrodes (21, 23) and the insulating protection layer (15). At the time of forming one or more plating layers (33), a plating metal is accumulated in the plating accumulating section (S), and steps formed between the soldering electrode sections (21, 23, 27, 33) and the insulating protection layer (15) can be made small to a certain extent by the plating layer (33).

The invention relates to the technical field of lightning arresters, in particular to a miniaturized GIS tank-type metal-oxide lightning arrester. The miniaturized GIS tank-type metal-oxide lightningarrester comprises a disc spacer, a conductive rod, a tank body, a voltage-grading shielding cover and a zinc oxide varistor core, wherein the disc spacer is fixedly connected to the top of the tank body through a fixing assembly; the tank body is filled with a sulfur hexafluoride gas; the conductive rod, the voltage-grading shielding cover and the zinc oxide varistor core all are arranged in thetank body; one end of the conductive rod is connected to the bottom of the disc spacer; and the other end of the conductive rod is connected to the zinc oxide varistor core through the voltage-gradingshielding cover. By adopting the structure arrangement, the lightning arrester adopts high-gradient zinc oxide varistors, so that the electric performance is ensured, and meanwhile, the utilization number of the zinc oxide varistors is reduced. The zinc oxide varistor core is formed by connecting three zinc oxide varistor groups and a helical structure in series, so that the overall height of thelightning arrester is reduced, the structure is more compact and the floor area of equipment is effectively reduced. Meanwhile, the invention further discloses an implementation method of the lightning arrester.