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| Number | Title | Issue Date |
| 8189308 | Integrated circuit An integrated circuit includes an input/output pad for signal exchange with an external circuit, an electrostatic discharge (ESD) protection unit coupled to the input/output pad and configured to form an ESD path between a first voltage line and a second voltage lin... | 05/29/2012 |
| 8164868 | Device for short-circuiting power semiconductor modules An apparatus has power semiconductor modules, which are connected to one another via connection devices so as to form a series circuit. A short-circuiting device for short-circuiting the respective power semiconductor module is assigned to each power semiconductor m... | 04/24/2012 |
| 8154833 | Line side crowbar for energy converter A line side crowbar circuit for an energy converter is disclosed. In one aspect there is a power unit that includes an energy converter; a transformer configured to transfer electrical energy generated from the energy converter to an electrical grid; and a crowbar c... | 04/10/2012 |
| 8102630 | Method for maintaining connectivity in failed switches of stack Plural of switches are connected as switch stacking for easier management. Failures of stack member switches disrupts the stack and network availability. This invention discloses a method to maintain stacking connections in failed switches. This invention introduces... | 01/24/2012 |
| 8102631 | Computer power supply and standby voltage discharge circuit thereof A computer power supply includes a standby voltage output terminal to output a standby voltage, a power connector connected to the standby voltage output terminal, and a standby voltage discharge circuit including a zener diode, first and second electrical switches.... | 01/24/2012 |
| 7911747 | Systems and methods for grounding power line sections to clear faults Systems and methods for dynamically clearing faults in a power transmission line involve automatically terminating ends of a section of the power line while preserving electrical and/or physical continuity of the power line. The terminating of the ends is reversed a... | 03/22/2011 |
| 7701681 | System and method for mitigating an electrical arc fault A method and apparatus for mitigating arc faults in a power generation system includes reducing and/or eliminating voltage when an arc is present, to protect the system from associated damage. ... | 04/20/2010 |
| 7633730 | Circuit breaker and short circuiter combination A circuit breaker for multi-phase power includes an opening-closing apparatus configured to open and close each phase of the multiphase power, a detection unit configured to detect a fault current in at least one phase of an electrical installation being protected b... | 12/15/2009 |
| 7495872 | Semiconductor unit To improve the ESD protection of a circuit receiving a signal. An inverter circuit INV1 is connected to ground wiring GND1 for supplying power, and is connected to power supply wiring VDD1 via a PMOS transistor MP5. An inverter circuit IN... | 02/24/2009 |
| 7433165 | Auto-resetting span-power protection Systems and methods for auto-resetting span power protection are provided. In one embodiment, a method for deactivating a protective device is provided. The method comprises determining when an overload condition occurs on a communication medium; when the overload c... | 10/07/2008 |
| 7366622 | Arc fault identification using model reference estimation An apparatus and method for the identification of arcing phenomena in a faulted electrical network. By continually updating a model for the load on an electrical branch, an estimate of the behavior of that load may be calculated. Since electrical arcing faults resul... | 04/29/2008 |
| 7342327 | Series connected light string with filament shunting A string set of series-connected incandescent bulbs in which substantially all of the bulb filaments in the set are individually provided with a shunt circuit which includes a voltage responsive switch which is inoperative during normal operation of the string set w... | 03/11/2008 |
| 7317604 | Over-current protection device An over-current protection device is constituted of a current detection unit for detecting a current from a power-supply source to a load having a magnetism detection element with a magnetic impedance (MI) effect, an AC-current supply device for supplying an AC curr... | 01/08/2008 |
| 7307822 | Semiconductor integrated circuit apparatus A semiconductor integrated circuit device is disclosed, which comprises power supply system circuits, in which power supply terminals and/or ground terminals are separated from each other between the power supply system circuits, an electrostatic discharge protectin... | 12/11/2007 |
| 7295413 | Control circuit of power supply with selectable current-limiting modes The present invention relates to a control circuit of power supply with selectable current-limiting modes. Via a select circuit in the control circuit of the power supply of the present invention, the user himself can select and switch the operating mode of the curr... | 11/13/2007 |
| 7276911 | Detection of malfunctioning bulbs in decorative light strings A system for locating a malfunctioning bulb in a decorative light string uses an antenna that produces an output signal corresponding to the strength of the electric field produced by a portion of the light string near the antenna. An amplifier is coupled to the ant... | 10/02/2007 |
| 7268990 | Power amplifier protection A power amplifier protection circuit that includes protection circuitry to variably shunt an input radio frequency (RF) signal to AC ground, turn off bias to an output transistor of a power amplifier, and turn off the output transistor. The power amplifier protectio... | 09/11/2007 |
| 7256372 | Fluid-heating apparatus, circuit for heating a fluid, and method of operating the same A fluid-heating apparatus for heating a fluid and method of operating the same. The fluid-heating apparatus includes a heating element for heating a fluid surrounding the heating element and a control circuit connected to the heating element and connectable to a pow... | 08/14/2007 |
| 7253637 | Arc fault circuit interrupter system In order to determine whether arcing is present in an electrical circuit, a sensor signal corresponding to current in said electrical circuit is processed. The sensor signal is filtered to determine the presence of noise in a predetermined frequency range and produc... | 08/07/2007 |
| 7254003 | Differential nulling avalanche (DNA) clamp circuit and method of use A circuit for protecting an electronic device including a differential nulling avalanche clamp circuit (200, 300) and method of using the circuit in an electronic system (100) to limit radio frequency overdrive. The electronic system (100) inclu... | 08/07/2007 |
| 7242148 | Continuous current control circuit modules of series string bulbs type (II) The invention relates to a continuous current control circuit module of series string bulbs type (II), which can maintain the normal current and voltage across each of the bulbs when any of series connected bulbs burn out. The string includes a shunt in every bulb a... | 07/10/2007 |
| 7242560 | Discrete circuit for driving field effect transistors An electronic circuit for protecting a field effect transistor from high voltage includes a switching device having a first state in which the switching device turns the field effect transistor ON, and a second state in which the switching device turns the field eff... | 07/10/2007 |
| 7224557 | Method and system of controlling asynchronous contactors for a multi-phase electric load Control of an induction motor is carried out to limit damaging arcing stress and mechanical stresses placed on the control contactor assembly and the induction motor resulting from the simultaneous or synchronous breaking and making of contactors employed to connect... | 05/29/2007 |
| 7209330 | Reset lockout for circuit interrupting device Resettable circuit interrupting devices, such as GFCI devices, that include a reset lock-out mechanism are provided. The reset lock-out mechanism prevents the resetting of electrical connections between input and output conductors if the circuit interrupting mechani... | 04/24/2007 |
| 7196433 | Multi-output device with preset power supply priority A multi-output circuit device with preset power supply priority that provides higher safety, wherein, the load of inferior priority depending on the preset overload breaking sequence is cut off first when the total load amperage exceeds the rated amperage while main... | 03/27/2007 |
| 7187091 | Safety switching module and method for testing the switching-off ability of a switching element in a safety switching module A safety switching module for safely switching-off an electrical load (43), comprising a first and a second switching control device (20A, 20B); a first and a second switching element (24.1, 24.2) both being series-connected with each oth... | 03/06/2007 |
| 7166968 | DC series connected light string with diode array shunt A series-connected string of incandescent light bulbs, operating on half-wave or full-wave rectified DC voltage, each having connected thereacross a filament voltage regulating shunting circuit which regulates the voltage across an empty or otherwise inoperative soc... | 01/23/2007 |
| 7157859 | Lighting device and lighting system First resistors (R1, R2) for setting a forward current value are connected in series to light-emitting diodes (LED 1, LED 2) respectively to constitute first serial circuits (112, 113), which are connected to an input terminal (... | 01/02/2007 |
| 7151656 | Arc fault circuit interrupter system A system for determining whether arcing is present in an electrical circuit in response to a sensor signal corresponding to current in the circuit includes a circuit for analyzing the sensor signal to determine the presence of broadband noise in a predetermined rang... | 12/19/2006 |
| 7151298 | Electrostatic discharge protection network having distributed components An electrostatic discharge protection network comprising electrostatic discharge (ESD) clamp devices distributed between turns of a coil shaped inductor. The inductance of the coil shaped inductor and parasitic capacitance of the ESD clamp devices form a low pass fi... | 12/19/2006 |
| 7145343 | Repair device for decorative light shunt A repair device for fixing a malfunctioning shunt across a failed filament in a light bulb in a group of series-connected miniature decorative bulbs includes a high-voltage pulse generator producing one or more pulses of a magnitude greater than the standard AC powe... | 12/05/2006 |
| 7136265 | Load recognition and series arc detection using bandpass filter signatures A method and system for determining whether arcing is present in an electrical circuit includes sensing a change in an alternating current in the circuit and developing a corresponding input signal, analyzing the input signal to determine the presence of broadband n... | 11/14/2006 |
| 7082021 | Circuit interrupter with improved surge suppression A suppression and protection circuit is used in conjunction with a circuit interrupter. In one configuration, a voltage clamping device such as a metal oxide varistor is utilized in a ground fault circuit interrupter product for handling transient surges and overvol... | 07/25/2006 |
| 7069524 | Method and device for analyzing a network of conductors To analyze a network of conductors, especially an electrical power supply network, it is planned to measure the spectral (49) and temporal (50) nature of a signal available at a node of the network. An image (49–51) representing this state is ... | 06/27/2006 |
| 7068480 | Arc detection using load recognition, harmonic content and broadband noise A method of determining whether arcing is present in an electrical circuit includes sensing a change in current in the circuit and developing a corresponding input signal, analyzing the input signal to determine the presence of broadband noise in a predetermined ran... | 06/27/2006 |
| 7042116 | Series connected light string with filament shunting A string set of series-connected incandescent bulbs in which substantially all of the bulb filaments in the set are individually provided with a shunt circuit which includes a voltage responsive switch which is inoperative during normal operation of the string set w... | 05/09/2006 |
| 7031131 | Overload current protection apparatus A current sensor which constitutes an overload protection apparatus and senses a current supplied from a power source to a load is constituted by providing a magnetic sensor having the effect of magnetic impedance (MI), an AC supply means which impresses AC on this ... | 04/18/2006 |
| 6999292 | Active protection device for low voltage circuits in items of low voltage equipment The invention establishes a method and a device for supplying external circuit units with an overvoltage (101), present on a high voltage circuit (100), in which connected items of low voltage equipment (116) are protected from damage due to the... | 02/14/2006 |
| 6992874 | Dual stage current limiting surge protector system A dual stage current limiting surge protector system for protecting telecommunications equipment from power and surge transients is provided. The surge protector system includes a voltage suppressor having first and second ends operatively coupled between input tip ... | 01/31/2006 |
| 6975491 | Electrical ground protection device and method An apparatus and method for protecting against electrocution hazards that arise when an appliance is electrically connected to a miswired single-phase AC electrical source are described. Protection is provided against miswiring conditions that cause the putative gro... | 12/13/2005 |
