| Entries |
| Document | Title | Date |
|---|
| 20090067103 | SIGNAL CIRCUIT AND INFORMATION PROCESSING APPARATUS HAVING THE SAME - A high-frequency appliance, which is allowed to have an ESD tolerance by using a small-sized and low-cost ESD protection circuit, and in particular, an antenna duplexer having a multi-band high-frequency switch function. There are provided a signal separation unit for separating a first frequency band signal from a second frequency band signal, the second frequency band being lower than the first frequency band, a first SAW filter for inputting the first frequency band signal outputted from the signal separation unit, a second SAW filter for inputting the second frequency band signal outputted from the signal separation unit, and a high-pass filter for permitting passing of the second frequency band signal, and limiting passing of a signal whose frequency band is lower than the second frequency band, the high-pass filter being located on a signal line connecting the signal separation unit and the second SAW filter to each other. | 03-12-2009 |
| 20090141412 | ELECTRICAL INTERFACE SYSTEM - An interface system may be used to connect an electrical device to an electrical bus. The interface system may include a first end and a second end in electrical communication with the first end. Where the interface system is used to connect an electrical device to an electrical bus, the first end may be connected to the electrical bus and the second end may be connected to the electrical device. The interface system may also include a reverse current blocking circuit configured to block current from flowing from the second end to the first end. Additionally, the interface system may include a discharge circuit electrically connected between the first end and the second end for discharging the blocked current. | 06-04-2009 |
| 20090296290 | LENZ ROUTE - The present invention relates to Lenz effect in a circuit. When a close loop is suddenly opened or closed, the Lenz voltage will be generated at inductor in the loop. The Lenz current generated by the Lenz voltage flows oppositely to the normal current and it usually comes with very high and broadband frequency. The design of a Lenz route parallel to an inductor in a circuit can dissipate the Lenz power to stabilize the circuit. The design of a Lenz route can also be applied to a switch to protect the switch against the Lenz effect. | 12-03-2009 |
| 20090303643 | SURGE PROTECT CIRCUIT - The present invention relates to a solution to the unpredictable, inrush voltage or current surge such as static electricity and eddy current phenomenon. The solution provides a circuit which can guide an unpredictable voltage or current surge into the circuit and let them dissipate in the circuit. The present invention also relates to a solution to a DC power source surge. The solution provides a protection circuit to divide an input power surge into DC and AC in which AC will be dissipated in the protection circuit and the safe DC is sent to the output. The present invention further relates to an energy discharge capacitor which can quickly dissipate the charge and the capacitor can be applied to our inventive circuits. | 12-10-2009 |
| 20090310265 | SEMICONDUCTOR DEVICE - The resistance of an integrated circuit against ESD (electrostatic discharge) is improved without disturbing improvement of the performance and reduction of size of the integrated circuit. A protection circuit is interposed between an input and output terminals. When ESD is generated, the input and output terminals are short-circuited by the protection circuit, so that overvoltage application to the circuit is prevented. The circuit is electrically connected to the input and output terminals by a connection wiring. The circuit has a plurality of electrical connection portions between the circuit and the connection wiring, and the connection wiring is formed such that the wiring resistance between the input or output terminal and each of the connection portions is the same. Accordingly, if ESD is generated, voltage application on only one of the connection portions is prevented, whereby the possibility that the circuit will be broken by ESD is decreased. | 12-17-2009 |
| 20100039739 | VOLTAGE FAULT DETECTION AND PROTECTION - A fault detection and protection circuit can include a comparing circuit (e.g., a comparator or a detector) that can be connected to a power line supplying power to an electronic device being tested. The comparing circuit can be configured to detect a fault in which the power line is shorted to ground. For example, the electronic device being tested may have a fault in which its power terminals are shorted to ground. Upon detection of such a fault, the comparing circuit activates one or more switches that shunt capacitors or other energy storage devices on the power line to ground. The comparing circuit may alternatively or in addition activate one or more switches that disconnect the power supply supplying power to the electronic device under test from probes contacting the electronic device. | 02-18-2010 |
| 20100097734 | Method and Apparatus for Protecting Power Systems from Extraordinary Electromagnetic Pulses - One form of the invention provides a method and apparatus for preventing an extraordinary electromagnetic pulse from reaching and rendering inoperative an electrical component of an electrical power system, wherein the component is located in a conductive path of the system that receives the pulse. The method and apparatus comprises the steps or means for detecting the presence of the pulse in the conductive path prior to the pulse reaching and rendering inoperative the electrical component. The pulse is diverted around the electrical component with a low inductance, high current capacity circuit relative to the electrical component before the pulse can reach and render the electrical component inoperative. The foregoing invention may beneficially utilize a high-speed current shunt comprising a flat conductive metal strap having a defined current-measuring region, a tapered parallel-plate transmission-line matching transformer attached to the current-measuring region and an output via a coaxial cable. | 04-22-2010 |
| 20100118453 | Apparatus for Protection of Converter Modules | 05-13-2010 |
| 20100202090 | PROTECTION CIRCUIT, SEMICONDUCTOR DEVICE, PHOTOELECTRIC CONVERSION DEVICE, AND ELECTRONIC DEVICE - It is an object to provide a protection circuit and a semiconductor device to which a countermeasure against ESD is applied. The protection circuit includes a signal line electrically connected to an integrated circuit; a first diode provided between the signal line and a first power supply line; a second diode provided in parallel to the first diode; and a third diode provided between the first power supply line and a second power supply line. The first diode is a diode formed by diode-connecting a transistor, and the second diode is a diode having a PIN junction or a PN junction. The protection circuit is particularly effective when applied to a semiconductor device manufactured using a thin film transistor. | 08-12-2010 |
| 20100208397 | SWITCHED SAFETY PROTECTION CIRCUIT FOR AN AIMD SYSTEM DURING EXPOSURE TO HIGH POWER ELECTROMAGNETIC FIELDS - An energy management system that facilitates the transfer of high frequency energy induced on an implanted lead or a leadwire includes an energy dissipating surface associated with the implanted lead or the leadwire, a diversion or diverter circuit associated with the energy dissipating surface, and at least one switch disposed between the diversion circuit and the AIMD electronics for diverting energy in the implanted lead or the leadwire through the diversion circuit to the energy dissipating surface. The switch may comprise a single or multi-pole double or single throw switch. The diversion circuit may be either a high pass filter or a low pass filter. | 08-19-2010 |
| 20100271737 | Protection Circuit for MOSFET - The present invention relates to a protection circuit for MOS-technology field-effect transistors. The circuit comprises at least one MOSFET protected by a module for blocking said MOSFET, the module being placed between the gate of the MOSFET and an electrical conductor, the module comprising switched connection means having at least two states: a first state which connects the gate of the MOSFET to the conductor, which is maintained at an electrical potential suitable for blocking the MOSFET, this first state being activated in the presence of an alarm signal; and a second state which disconnects the gate of the MOSFET, this second state being activated in the absence of the alarm signal. The invention applies notably to the protection of the power MOSFETs included in the amplification stages of electronic systems. | 10-28-2010 |
| 20100277839 | OVERPOWER PROTECTION CIRCUIT - A power protection apparatus includes a PIN diode circuit and a solid state limiter. The PIN diode circuit is connected to a signal path for transporting RF signals between a first RF device and a second RF device, the PIN diode circuit including first and second PIN diodes having opposite polarities. The solid state limiter is configured to detect an overpower condition of an RF signal input from the second RF device on the signal path, and to trigger the PIN diode circuit in response to the detected overpower condition, limiting the overpower condition. | 11-04-2010 |
| 20110013323 | 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 at about voltage zero-crossings in the power line to clear a fault. | 01-20-2011 |
| 20110013324 | 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 at about voltage zero-crossings in the power line to clear a fault. | 01-20-2011 |
| 20110038083 | GUARDED ELECTRICAL OVERSTRESS PROTECTION CIRCUIT - Disclosed embodiments are directed to an electrical overstress protection circuit. The electrical overstress protection circuit may include an intermediate node receiving a reference voltage, a first pair of clamp devices, having opposite polarity, clamping an input signal line to the intermediate node, and a second pair of clamp devices, each clamping the intermediate node to one of two reference potentials. The electrical overstress protection circuit may also include a filter connected to the intermediate node to reduce noise at the intermediate node. | 02-17-2011 |
| 20110228430 | POWER DISTRIBUTION UNIT - A power distribution unit includes a communication unit. The communication unit includes a communication port and a protection circuit. The communication unit includes a ground pin and a plurality of signal pins. The ground pin is connected to a digital ground of the power distribution unit. The signal pins are connected together to receive a voltage signal outputted by a hi-pot tester. The protection circuit includes a plurality of resistors connected between the signal pins and an analog ground of the power distribution unit. | 09-22-2011 |
| 20120008240 | High efficiency amplifier with reduced electromagnetic interference - Disclosed is a high efficiency amplifier operable to substantially reduce electromagnetic interference (EMI). The high efficiency amplifier comprises an output stage to provide a high powered signal to a load. The high efficiency amplifier further comprises an overlap protection circuit to produce a timing non-overlap in a control signal for the output stage, and an edge control circuit to reduce a transient portion of the high powered signal to substantially reduce the EMI. The overlap protection circuit and the edge control circuit may be implemented with resistive source degeneration. Also disclosed is a related method. In one embodiment, the high efficiency amplifier and the related method may be incorporated into a cellular telephone or a mobile audio device. | 01-12-2012 |
| 20120069477 | ADJUSTABLE ARC ELECTRODE ASSEMBLY AND METHOD OF ASSEMBLING - A circuit protection device for use with a circuit that includes at least one conductor includes at least one phase electrode assembly that is electrically coupled to the at least one conductor, wherein the at least one phase electrode assembly comprising an adjustable electrode assembly. The circuit protection device also includes a conductor base comprising at least one isolation area sized to secure the adjustable electrode assembly therein, and a conductor cover coupled to the conductor base and including at least one isolation channel, wherein the adjustable electrode assembly extends at least partially through the at least one isolation channel. | 03-22-2012 |
| 20120182650 | Enhanced ESD Protection of Integrated Circuit in 3DIC package - Enhanced electrostatic discharge (ESD) protection schemes of an integrated circuit in three-dimensional (3D) integrated circuit (ICs) packages, and methods of forming the same are presented in the disclosure. An array of ESD protection devices can be formed in an interposer and placed under one or a plurality of ICs so that a hard block inside an IC on top of the interposer can be connected to an ESD protection device of the array and is protected from ESD. The ESD protection device cell of the array is connected to a Voltage Regulator Module (VRM) which can be placed inside the interposer, on the surface of the interposer, or on the surface of a printed circuit board (PCB). The ESD protection array is of generic nature and can be used with many kinds of ICs to form a three-dimensional IC package. Further embodiments of ESD protection for 3D IC package is disclosed where an ESD protection device inside a first IC 2 can be shared with another IC 1 to protect a hard block within IC 1. | 07-19-2012 |
| 20120327540 | BASE STATION RADIO FREQUENCY SYSTEM AND METHOD FOR PROTECTING RADIO FREQUENCY POWER AMPLIFIER - A method is disclosed for protecting a radio frequency power amplifier applied in a base station radio frequency system. The method comprises: a protection detection circuit detecting a signal output by a transceiver and sending a turn-on control signal to a protection switch circuit when the signal is greater than a preset threshold; and the protection switch circuit receiving the turn-on control signal sent by the protection detection circuit and controlling its grounded connection based on the turn-on control signal. A base station radio frequency system is also disclosed comprising a transceiver and a radio frequency power amplifier connected to each other, a protection detection circuit and a protection switch circuit. Using the method and system, abnormal big signals with wide spectrum cannot enter the power amplifier, thereby achieving the object of protecting the power amplifier from being damaged. | 12-27-2012 |
| 20130003234 | 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 at about voltage zero-crossings in the power line to clear a fault. | 01-03-2013 |
| 20130050883 | INTEGRATED ADVANCE COPPER FUSE COMBINED WITH ESD/OVER-VOLTAGE/REVERSE POLARITY PROTECTION - In one embodiment, an integrated circuit, and method of manufacturing thereof, is provided. The integrated circuit contains an over-voltage protection element and an over-current protection element. The integrated circuit operates to provide enhanced and efficient ESD functionality. The over-current element of the instant disclosure includes a diffusion protection layer to enhance the lifetime of the over-current element and improve functionality. | 02-28-2013 |
| 20130070375 | ELECTRICAL COMPONENT AND METHOD FOR CONTROLLING AN ELECTRICAL COMPONENT - An electrical component having a core and a first and second coil positioned around the core is controlled in such a manner, that in response to the second coil being switched off, the first coil is short-circuited via a quenching circuit to quench the inductive load of the second coil. | 03-21-2013 |
| 20130128397 | BYPASS CAPACITORS FOR HIGH VOLTAGE BIAS POWER IN THE MID FREQUENCY RF RANGE - A system for decoupling arcing RF signals in a plasma chamber including a top electrode, an electrostatic chuck for supporting a semiconductor wafer, and a capacitor coupled between the at least one of a plurality of clamping electrodes in the surface of the electrostatic chuck and a baseplate of the electrostatic chuck, the capacitor having a capacitance of greater than about 19 nanofarads, the capacitor disposed within an interior volume of the electrostatic chuck. A method of decoupling arcing RF signals in a plasma chamber is also disclosed. | 05-23-2013 |
| 20130250460 | Electrical or Electronic Safety Circuit - A time triggered crowbar, which is so embodied that it monitors the on-time of at least one downstream electronic component and the period of clocking and therewith the power supply in such a manner that a predetermined maximum allowable surface temperature of the at least one downstream component is not exceeded in the explosion endangered area. | 09-26-2013 |
| 20130265675 | DIGITAL PROTECTIVE RELAY - A digital protective relay includes at least one daughter PCB having an electronic circuit which generates electromagnetic interference noise or high frequency noise; and a backplane printed circuit board having, on an upper surface thereof, a plurality of first connectors for connection with the daughter PCB, connected to the daughter PCB through the first connectors, and providing a noise discharge path along which the electromagnetic interference noise or the high frequency noise from the daughter PCB flows to an external ground. | 10-10-2013 |
| 20130335867 | CHARGE INJECTION AND DRAIN-BASED ELECTRICAL OVERSTRESS (EOS) PROTECTION APPARATUS AND METHOD - An electrical overstress (EOS) protection circuit that at least partially neutralizes or compensates for undershoot and overshoot in first and second signals that are communicated using differential signaling, such as with USB communications. For an undershoot, the EOS protection circuit injects charge into pads that receive the first and second signals. For an overshoot, the EOS protection circuit drains charge from the pad that receives the second signal and injects charge into the pad that receives the first signal. | 12-19-2013 |
| 20140293491 | Active Bypass Diode Circuit and Solar Power Module with Arc Flash Mitigation Feature - An active bypass diode circuit that mitigates the hazard of arc flash events in a Photovoltaic (PV) solar power array, and a PV solar power module that utilizes a plurality of said active bypass circuits are disclosed The active bypass circuit comprises a diode, a switch in parallel with the diode, a control circuit for opening and closing the switch, a circuit for detecting arc flash events, a power management circuit, a power supply circuit, and a capacitor. When an arc flash event is detected, all the switches are closed concurrently, reducing the voltage produced by the PV string to a level that is too low the sustain the arc, and thereby terminating the arc. | 10-02-2014 |
| 20150029621 | ARRANGEMENT FOR CONTROLLING THE ELECTRIC POWER TRANSMISSION IN A HVDC POWER TRANSMISSION SYSTEM - An arrangement for controlling the electric power transmission in a high voltage direct current, HVDC, power transmission system includes at least one HVDC transmission or distribution line for carrying direct current, DC, and the arrangement includes an apparatus connectable to the HVDC transmission or distribution line, the apparatus being arranged to control the direct current of the HVDC transmission or distribution line by introducing a DC voltage in series with the HVDC transmission or distribution line. The arrangement includes a protection device for protecting the apparatus against over-current or overvoltage occurrences. The protection device includes a bypass device connectable to the HVDC transmission or distribution line and connected in parallel with the apparatus. The bypass device is arranged to be in a non-conducting mode and arranged to be set to a conducting mode. When being in the conducting mode, the bypass device is arranged to conduct direct current of the HVDC transmission or distribution line to electrically bypass the apparatus. A HVDC power transmission system includes at least one arrangement of the above-mentioned sort. A method for protecting an apparatus against over-current or overvoltage occurrences, the apparatus being included in an arrangement of the above-mentioned sort. | 01-29-2015 |
| 20150043111 | CONTROL UNIT FOR A MOTOR VEHICLE - The invention relates to a control unit for a motor vehicle. Said control unit comprises a voltage converter which has an inlet for a direct voltage network. Said voltage converter is designed to generate a direct voltage smaller than an input voltage on the inlet for the direct voltage network and the direct voltage is emitted on the outlet side. According to the invention, the voltage converter comprises an inverter and a transformer which is connected to said inverter. Said voltage converter also comprises an inlet for a discharge signal and is designed to discharge by means of the inverter an intermediate circuit capacitor which is connected to the inlet of the direct voltage network in accordance with the discharge signal, and to reduce a working frequency of the inverter, in particular, compared to the frequency with no discharge signal. | 02-12-2015 |
| 20150043112 | SYSTEMS AND METHODS FOR GROUNDING POWER LINE SECTIONS TO CLEAR FAULTS - A system for clearing power transmission line faults includes a sensor network configured to communicate with a transmission line and configured to detect one or more faults on the transmission line, a crowbar configured to coordinately switch first and second ends of a section of the transmission line to respective termination points, wherein the crowbar includes first and second grounding switches disposed respectively at about the first and second ends of the section of the transmission line, and a controller configured to receive information from the sensor network and configured to control the switching of the crowbar in response to the information. | 02-12-2015 |
| 20150357812 | ELECTRICAL SYSTEM HAVING GALVANIC ISOLATION - The present disclosure is directed to an electrical system. The electrical system may include a first device having a first chassis and a first port therein. The electrical system may further include a second device having a second chassis and a second port therein. The first device and the second device may be connected by a cable through the first port and the second port. The second chassis may be conductively connected to earth ground. The pin on the second port may be connected to isolated ground in the second device through an electrostatic discharge protection device, and the isolated ground may be connected to the second chassis through a set of capacitors. | 12-10-2015 |
| 20150380928 | PROTECTION OF DISTRIBUTED ANTENNA SYSTEMS - A protection circuit may be configured for detecting electrical power of downlink radio frequency (RF) signals, and diverting a substantial portion of the downlink RF signals away from a downlink RF interface of a distributed antenna system DAS in response to the detected electrical power being equal to or greater than a predetermined electrical power. The downlink RF signals diverted away from the downlink RF interface may be routed to an electrical load. The protection circuit may include hysteresis. | 12-31-2015 |
| 20160043540 | SYSTEMS AND METHODS FOR GROUNDING POWER LINE SECTIONS TO CLEAR FAULTS - A system for clearing power transmission line faults includes a sensor network configured to communicate with a transmission line and configured to detect one or more faults on the transmission line, a crowbar configured to coordinately switch first and second ends of a section of the transmission line to respective termination points, wherein the crowbar includes first and second grounding switches disposed respectively at about the first and second ends of the section of the transmission line, and a controller configured to receive information from the sensor network and configured to control the switching of the crowbar in response to the information. | 02-11-2016 |
| 20220140595 | Short to Ground Protection and Automatic Recovery - An apparatus includes a single sense pin connected to a line of a device connected to the apparatus, a gate pin configured to produce a gate signal to enable or disable a switch connected between the line of the device connected to the apparatus and a system ground, and control logic. The control logic is configured to at the single sense pin, determine a short between the device and the system ground, and, based upon the determination of the short, disable the switch. | 05-05-2022 |
