Abstract: In a portable data erasing device, to prevent data leaks from magnetic disk devices to be disposed, data is erased by a simple operation. The data erasing device using a magnetic field generated by permanent magnets to erase data comprises a sliding tray, a main body and a swinging tray. The sliding tray is movable into and out from the main body, two permanent magnets, adjacently arranged so that the north and south poles thereof have mutually attracting polarities, are attached to the front end of the sliding tray. One end of the swinging tray is fixed to the upper surface of the main body by a shaft, so that a magnetic disk device can be mounted and swung on top of the main body. While the sliding tray is extracted stepwise from the main body, the magnetic disk device can be swung, and data on the magnetic disks erased.

Abstract: A distance relay apparatus includes a directional relay element which performs computation to detect a fault, which occurs in the forward direction from an installing point of the relay apparatus, based on a voltage and a current which are received from an object to be protected, a zone-1 distance relay element which performs computation to detect a fault within a predetermined zone, a fault detecting relay element which performs computation to detect a fault within a zone that is narrower than that of the zone-1 distance relay element in terms of data time length which is shorter than that used for the computation of the zone-1 distance relay element, and a logic element which outputs a relay signal in accordance with a detecting operation of the zone-1 distance relay element, the fault detecting relay element, and the directional relay element.

Abstract: It is possible to predict with acceptable accuracy the time to failure of a device having a thin gate dielectric in a field effect transistor. Such prediction is based on the realization that for such thin dielectric multiple dielectric breakdown occurs before device failure ensues and that measurement of the device quiescent current flow provides the information necessary for such prediction. The ability to make reliable prediction allows improvement of device design, manufacture, and use.

Abstract: An alternative power source provides alternating current (AC) through a proper connector into a first outlet of a pre-existing electrical distribution system which is normally powered by an alternating current electrical power supply through main breakers and a breaker box. At least one of the breakers which controls power from the normal AC electrical power supply on the electrical distribution system is opened prior to connecting the alternative power supply. The alternative power supply provides electricity through the proper connector into the first outlet, or node, to provide alternating current to a selected portion of the electrical distribution system, and possibly to both halves of the pre-existing electrical distribution system if the proper connector is connected to a 240 volt outlet, or if two proper connectors are utilized and connected to first and second outlets with the first and second outlets on each of the two phase (power) wires of the pre-existing electrical distribution system.

Abstract: Apparatus for providing over-current protection in a power converter device includes a first circuit for providing high-side sinking over-current protection for the power converter device responsive to a phase signal and a high-side over-current signal of the power converter device. A second circuit provides low-side sinking over-current protection for the power converter device responsive to the phase signal and the low-side over-current signal of the power converter device. Finally, a third circuit provides low-side sourcing over-current protection responsive to the phase signal, the low-side over-current protection signal and a power ground signal of the power converter device.

Abstract: Disclosed is a display device for a thermal magnetic type molded case circuit breaker capable to display a phase deficiency occurred on a line to a user such that the user rapidly deals with the phase deficiency and prevents loss caused by over-heating generated due to the phase deficiency. The thermal magnetic type molded case circuit breaker has a bimetal, which is bendable when heat is applied thereto, and a shifter coupled to an upper end of the bimetal and horizontally moved corresponding to a bending degree of the bimetal when over-current is applied thereto. The display device includes a power source for supplying electric power, a display for displaying the phase deficiency of the thermal magnetic type molded case circuit breaker by receiving power from the power source, a stationary contactor electrically connected to the power source and having a stationary contact, and a movable contactor electrically connected to the display and having a movable contact.

Abstract: In a plasma processing apparatus using electrostatic chuck, increase of plasma potential is prevented and abnormal discharge is avoided. The plasma processing apparatus comprises an RF source for generating plasma in a vacuum container, another RF source for applying an RF bias power to a sample, a sample stage having an electrostatic chuck electrode, a DC power supply for applying an electrostatic chuck voltage to the electrode, and a controller for shifting the electrostatic chuck voltage to negative by a potential difference of quarter to half of peak-to-peak voltage of the RF bias power for suppressing increase of plasma potential.

Abstract: A cable having an electrostatic discharge (ESD) dissipative coating. The cable includes a lead and an ESD dissipative coating operatively coupled to the lead. Other layers such as adhesives and insulating layers can be provided. The ESD dissipative coating can also function as the insulator for the lead.

Abstract: A detection circuit detects a difference between a source current and a return current. The detection circuit includes a constantly biased magnetic core through which conductors of the source and return currents extend, and a sense winding around the core. The sense winding carries an AC signal. A sensing circuit connected with the sense winding senses a change in small signal impedance of the sense winding relative to the core. This detection circuit can be used to protect people and equipment against accidental contact with high-voltage DC systems.

Abstract: A control circuit that drives an electronic actuator. The control circuit includes a direct voltage source, a chopper circuit arranged between the source and an electric actuator, and an electronic control circuit designed to apply to the chopper circuit a command signal of the PWM type, with a predefined ON/OFF switching period and a predetermined duty cycle, for a predefined activation time, to produce a flow, within the electric actuator, of a correspondingly switched current having a nominal duration corresponding to the activation time. The control circuit detects the last whole or complete switching period included within the activation time, splits, in accordance with a predefined duty cycle, the final interval including the last complete switching period and any subsequent fraction of a switching period included within the activation time, and drives the chopper circuit in this final interval.

Abstract: When an AC adaptor is removed and a power supply to a power node NP of a ROM writing apparatus is stopped, an analog switch which is controlled by a voltage at the power node NP is turned off. Thus, even if a power voltage VTG of a user board side is applied, a data signal DAT which is outputted from the user board is shut off by the analog switch and does not reach the power node NP via a diode. Therefore, a control terminal of a 3-state buffer is certainly set to “L”. There is not a risk such that a pass current flows in the 3-state buffer and a breakdown by heat is caused. When a power source is shut off, a breakdown of an interface circuit due to a wraparound of a power voltage from another apparatus is prevented.

Abstract: A protection for ICs against ESD transients includes a circuit with a master circuit driving a slave circuit. The master circuit responds to ESD voltage V(t). The slave circuit comprises parallel shunt devices having common inputs. The output of the master circuit is coupled to the common inputs. As V(t) increases the master circuit applies a portion of V(t) to the input of the slave circuit shunt devices. The threshold voltage Vt1 at which the slave circuit shunt devices would otherwise turn on to a lower value Vt1? closer to the holding voltage Vh of the shunt devices. All of the slave circuit devices turn on substantially simultaneously at about Vt1? close to Vh, thereby shunting the ESD transient to ground at a lower value of V(t). The master and slave circuits are inactive during normal IC operation.

Abstract: A test circuit is provided, which is independent of a power supply and which enables a circuit breaker to be tested in a reliable manner. The test circuit includes a test coil which is devoid of electric potential and is wound around a totalizing current transformer. The test coil is preferably short circuited using a test switch and a connectable load. This simulates the occurrence of a residual current. The selection of an appropriate connectable load allows the sensitivity of the current circuit breaker to be tested in an advantageous manner.

Abstract: A support for a substrate processing chamber has upper and lower walls that are joined by a peripheral sidewall to define a reservoir. A fluid inlet supplies a heat transfer fluid to the reservoir. In one version, a plurality of protrusions extends into the reservoir to perturb the flow of the heat transfer fluid through the reservoir. In another version, the reservoir is an elongated channel having one or more of (i) serpentine convolutions, (ii) integral fins extending into the channel, (iii) a roughened internal surface, or (iv) a changing cross-section. A fluid outlet discharges the heat transfer fluid from the reservoir.

Abstract: A device for generating an intense radio frequency pulse through use of a helical Magneto-Cumulative Generator (MCG). The MCG provides a chemical explosion and acts as a converter to transform the chemical/mechanical energy into an electrical energy impulse. Due to the detonation/combustion process, a vortex wake is produced which assumes the role of a quarter-wave trap/antenna. If the MCG is in high velocity flight, a bow-shaped shockwave, followed by a second shock front, is established around the head of the MCG, becoming a second antenna. Without flight, two MCG's are placed head-to-head so that the vortex wakes emit in opposite directions. Since the explosion destroys the MCG, a model is created to perform multiple tests of the ability of an MCG to act as an RF device.

Abstract: The invention relates to a protective circuit for a CAN-bus transceiver that is designed voltagewise for a first vehicle electric system, said transceiver being operated in a second vehicle electric system with a voltage that is several times higher than the voltage of the first vehicle electric system, comprising two diodes arranged between the bus terminal leads of the transceivers whose cathodes are connected to one another and to which a predetermined potential is applied, in addition to a limiting resistor mounted between each of the bus terminal leads of the transceiver and the bus line assigned thereto and two current mirror circuits for maintaining the require voltage level in the bus lines.

Abstract: Systems and methods of the present invention are directed to wind energy. Wind rotors (1) drive at least two generators (2) which each have a corresponding rectifier unit (3). The rectifier unit (3) being an active rectifier having drivable power semiconductor components. An energy storage circuit (4) is associated with each rectifier unit (3) and is connected in parallel to a first busbar system (7). Each energy storage circuit (4) having at least one DC voltage capacitance, and the first busbar system (7) having a first protection switch (5) in at least one connection.

Abstract: An electrostatic discharge protection unit includes a channel, a passive filter, and an electrostatic discharge protection circuit. The passive filter and the electrostatic discharge protection circuit are formed on a substrate. The electrostatic discharge protection circuit couples the channel to the passive filter. A method includes, for a channel having a bandwidth determining the bandwidth, and generating a transfer function for a passive filter which when combined in series an electrostatic discharge protection circuit and the channel yields a combination transfer function which has a combination bandwidth that is greater than the channel transfer function bandwidth.

Abstract: An ultracapacitor energy storage cell pack includes an ultracapacitor assembly having a plurality of series connected ultracapacitors and balancing resistors, each balancing resistor connected in parallel with each ultracapacitor to automatically balance each ultracapacitor over time, thereby automatically over time discharging the ultracapacitors of the ultracapacitor assembly; an enclosure to enclose and protect the ultracapacitor assembly; a controller for the ultracapacitor assembly; and one or more temperature sensors to monitor temperature of the ultracapacitor assembly and coupled to the controller.

Abstract: A power supply voltage switch circuit for selecting a power supply voltage of an integrated circuit according to a first control signal. The power supply voltage switch circuit contains a high voltage selecting module for generating an output voltage according to the higher of a first and a second voltages; a level shifting module electrically connected to the high voltage selecting module to receive the output voltage as power supply, for performing level shifting to a first control signal according to the output voltage; and a selecting switch module electrically connected to the level shifting module for selectively outputting the first or the second voltage as the power supply voltage of the integrated circuit according to the level-shifted first control signal.