An electrical device (1) is provided, comprising an electrical high-frequency filter (9) and a shield (6) separating the filter from at least one further electrical component (9, 13) of the device, a signal conductor (17) which operably connects the filter (9) to the further component (9, 13) and traverses the shield (6) for transmitting a signal from the filter (9) to the component (9, 13) and a feedthrough capacitor system (19) being electrically arranged between the signal conductor (17) and the shield (6). The feedthrough capacitor system (19) comprises, in particular being formed essentially by, a plurality of surface mount capacitors (41) electrically arranged between the signal conductor (17) and the shield (6), the surface mount capacitors (41) in particular being surface mounted on a circuit board (11), which may be a printed circuit board.

ESD suppressor and manufacturing method thereof. The ESD suppressor include at least two printed circuit boards, one insulating frame, two terminal electrodes and two or more interior electrodes. The insulating frame is positioned between the two printed circuit boards, so as to form a main structure with a cavity. For each printed circuit board, at least one interior electrode is positioned on the surface facing the cavity and separated from other interior electrode(s). Two terminal electrodes are positioned on two different surfaces of the main structure and electrically connected to different interior electrodes respectively. Optionally, the insulating frame is a hallowed out printed circuit board or a frame formed by printing insulating material. In the manufacturing method, the thickness of the insulating frame is adjusted to adjust the relative distance between different printed circuit boards, so as to further adjust the breakdown voltage of the ESD suppressor

An electronic isolator device arranged for receiving field wiring from a field element includes a connector configured to receive a surge element for providing surge functionality to the electronic isolator device, and to provide surge protection to the connectivity by way of the field wiring. The connector is configured to connect the surge element to the electronic isolator device and to the field wiring. The connector is arranged for parallel connection of the surge element with respect to the field wiring such that the surge element can be connected and disconnected with the isolator device without disrupting the connection of the isolator device with the field elements.

An EMI filter arrangement includes a noise source, an input filter connected to the input of the noise source, and an output filter connected to the output of the noise source, the noise source, input filter and output filter provided in an electrically conductive electronics box, and an input filter capacitor electrically connecting the input filter to the electrically conductive electronics box and an output filter capacitor electrically connecting the output filter to the electrically conductive electronics box; the arrangement characterised by further comprising an intermediate reference plane provided in the electrically conductive electronics box, and an intermediate capacitor provided in the electrically conductive electronics box electrically connected between the intermediate reference plane and the electrically conductive electronics box, the input filter capacitor and the output filter capacitor being electrically connected to the box via the intermediate reference plane and the intermediate capacitor.

An EMP-resistant (electromagnetic pulse-resistant) case for portable electronic devices is provided. The case includes a conductive external housing configured to enclose the electronic device. The housing includes a lower housing having a continuous connection surface. The housing also includes an upper housing having a continuous connection surface. The lower and upper housing are configured to releasably engage at the continuous connection surface. The housing includes a conductive gasket positioned at the continuous connection surface between the upper and lower housing. The case also includes a first insulative layer at least partially covering the inside surface of the upper and lower housing.

A driving circuit includes at least one first module, an electrostatic charge/discharge module connected to the first module and a grounding module; each first module includes a driving module, a signal transmission module and a gating module; the signal transmission module is connected to and transmits a driving signal to the driving module; the grounding module is grounded; the gating module is connected with the signal transmission module; the gating module is turned on with its turn-on voltage less than or equal to a voltage of the signal transmission module, or turned off with the turn-on voltage greater than the voltage of the signal transmission module; the turn-on voltage of the gating module is greater than that of the driving module; the charge/discharge module is connected to the gating module and the grounding module, and configured to store charges flowing therethrough and release the charges to the grounding module.

A driving circuit includes at least one first module, an electrostatic charge/discharge module connected to the first module and a grounding module; each first module includes a driving module, a signal transmission module and a gating module; the signal transmission module is connected to and transmits a driving signal to the driving module; the grounding module is grounded; the gating module is connected with the signal transmission module; the gating module is turned on with its turn-on voltage less than or equal to a voltage of the signal transmission module, or turned off with the turn-on voltage greater than the voltage of the signal transmission module; the turn-on voltage of the gating module is greater than that of the driving module; the charge/discharge module is connected to the gating module and the grounding module, and configured to store charges flowing therethrough and release the charges to the grounding module.

An electromagnetic interference shielding configuration of an electronic device includes a housing, a connecting circuit board, at least one EMI filter, and a shielding component. The housing has an accommodating space and a shielding space. A mainboard is disposed in the accommodating space, and a connecting circuit board is disposed in the shielding space and electrically conducted to the mainboard. The at least one EMI filter is disposed on the connecting circuit board and electrically conducted to the mainboard through the connecting circuit board. The shielding component combines with the housing and covers the EMI filter. Thus the EMI filter will not have electromagnetic interferences with external electronic components and provide a stable operation of the electronic device.

A method and system for reducing static charges on a material. X-rays can ionize a flowing fluid. The ions can be transported to the material and can reduce or dissipate the static charges.

On a circuit board configured to transmit a signal, a pulse transformer is provided on a path used for transmitting the signal of the circuit board. A shield member is provided on the circuit board to prevent noise, which is generated due to noise current flowing in a noise line pattern, from entering the pulse transformer. The shield member covers a part of a surface of at least one pulse transformer, the part intersecting concentric circles (which represent a magnetic field generated by the noise current) whose central axis extends along the direction in which the noise current flows.