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| Number | Title | Issue Date |
| 8134816 | High-frequency power supply system A high-frequency power supply system includes an anomaly detector 3 which detects an anomaly occurring in a circuit on the side of a load L as from an outputting end A of a high-frequency power source 1. The anomaly detector 3 includes a first d... | 03/13/2012 |
| 7796368 | High-frequency power supply system A high-frequency power supply system includes an anomaly detector 3 which detects an anomaly occurring in a circuit on the side of a load L as from an outputting end A of a high-frequency power source 1. The anomaly detector 3 includes a first d... | 09/14/2010 |
| 7724487 | Apparatus, system, and method for lossless reverse voltage protection An apparatus, system, and method are disclosed for preventing reverse current in a switching power supply. An electrical connector receives an input current from an electric source. An input current limiting module substantially prevents the input current from reach... | 05/25/2010 |
| 7692908 | Protection of polarity-sensitive components connected in parallel with a direct current motor or inductor Circuits and methods for protecting polarity-sensitive components, such as light emitting diodes, electrolytic capacitors or integrated circuits, operating from a DC current source including a DC motor, an inductor or relay having a positive terminal and a negative ... | 04/06/2010 |
| 7679873 | Deep discharge protection for battery packs with cell groups A method of preventing deep discharge of the battery pack (1′) with series-connected cell groups (2a, 2b) by polarity reversal of an individual weakest cell (3), includes a difference measurement step which is repeated ove... | 03/16/2010 |
| 7463468 | Reverse circulation protection circuit A circuit for protection against reverse circulation of current through the body diode of an FET power switching device switching a load, the power switching device having gate, source and drain terminals, wherein the power switching device is connected in series wi... | 12/09/2008 |
| 7394633 | Reverse current protection circuit for switching power supply A reverse current protection circuit is provided to protect the internal circuit components of a switching power supply from being damaged by a reverse current discharging from an input filtering capacitor. The reverse current protection circuit according to a prefe... | 07/01/2008 |
| 7391612 | Dual impeller push-pull axial fan sink A fan sink that includes a dual impeller push-pull axial fan and a heat sink to cool a hot electronic device is presented. The axial fan has a hub motor, a first impeller that is radially proximate to the hub motor, and a second impeller that is radially distal to t... | 06/24/2008 |
| 7385815 | Dual impeller push-pull axial fan A fan sink that includes a dual impeller push-pull axial fan and a heat sink to cool a hot electronic device is presented. The axial fan has a hub motor, a first impeller that is radially proximate to the hub motor, and a second impeller that is radially distal to t... | 06/10/2008 |
| 7385816 | Dual impeller push-pull axial fan heat sink A fan sink that includes a dual impeller push-pull axial fan and a heat sink to cool a hot electronic device is presented. The axial fan has a hub motor, a first impeller that is radially proximate to the hub motor, and a second impeller that is radially distal to t... | 06/10/2008 |
| 7379282 | Input and output isolating diode for power dissipation reduction of power supplies The present invention is a method and system for providing improved isolation for power supplies while minimizing power dissipation. A body diode of a MOSFET may be utilized with a comparator circuit. The comparator circuit may detect current flow across the MOSFET ... | 05/27/2008 |
| 7373090 | Modulator driver circuit with selectable on-chip termination A method and apparatus to accommodate differing output loads without sacrificing impedance matching in an optical modulator driver. ... | 05/13/2008 |
| 7353407 | Methods and apparatus for provisioning phantom power to remote devices An apparatus provisions power from a power budget to remote devices configured to obtain phantom power. The apparatus includes, among other things, a controller which is configured to identify a power demand for a remote device (e.g., a power demand based on an actu... | 04/01/2008 |
| 7342760 | Circuit arrangement for protection against electrostatic discharge and voltage regulating device having a circuit arrangement A circuit arrangement for protection against electrostatic discharge for a field-effect transistor is disclosed. The arrangement includes a first and a second controllable path each having a control terminal. The control terminals of the controllable paths are coupl... | 03/11/2008 |
| 7324339 | Dual impeller push-pull axial fan heat sink A fan sink that includes a dual impeller push-pull axial fan and a heat sink to cool a hot electronic device is presented. The axial fan has a hub motor, a first impeller that is radially proximate to the hub motor, and a second impeller that is radially distal to t... | 01/29/2008 |
| 7262974 | Techniques for alleviating the need for DC blocking capacitors in high-speed differential signal pairs A circuit board has a first component interface configured to connect to a first circuit board component, a second component interface configured to connect to a second circuit board component, a differential signal pair electrically connecting the first component i... | 08/28/2007 |
| 7259537 | Polarity-reversal protection circuit for energy sources A polarity-reversal protector for power sources, in particular for automobile batteries, which is connected between a power source and at least one consumer and/or at least one generator, is described. The polarity-reversal protector is to prevent the reverse polari... | 08/21/2007 |
| 7251112 | Battery protect circuit for switched circuit that switches between a supply and a battery A circuit for protecting a battery includes an n-well formed within a p substrate. A p-type resistor is formed with in the n well and has a connection to the battery. An n+ ring is also formed in the n well and substantially surrounds the p-type resistor. ... | 07/31/2007 |
| 7196886 | Reverse wiring detect in circuit interrupting devices A resettable circuit interrupting device having a switch and timer circuit connected to the line side of the interrupting device to cause a leakage current to flow for a defined interval of time when power is applied. The timer and switch circuit comprises a timer p... | 03/27/2007 |
| 7184268 | Dynamically adaptable electronics cooling fan In an electronic system, a method for operating a cooling fan comprises rotating an impeller about a rotational axis and detecting fan failure. The impeller is spatially expanded in response to the detected fan failure whereby airflow through the failed fan is block... | 02/27/2007 |
| 7154725 | Hard disk drive (HDD) electrical over voltage stress (EOS) systems and methods The present invention relates to a hard disk drive system having overvoltage protection circuits for various types of overvoltage conditions. For example, the system comprises one or more hard disk drive integrated circuit chips residing on a board and a hard disk d... | 12/26/2006 |
| RE39446 | Power filter circuit responsive to supply system fault conditions A power filter circuit for protecting electronic equipment from electromagnetic interference introduced by a supply system circuit includes a fault/condition sensing circuit capable of detecting whether the supply system circuit is properly wired. The sensing circui... | 12/26/2006 |
| 7148585 | Power grid backfeed protection apparatus A circuit breaker that functions like a double pole double throw (DPDT) switch is used to isolate the commercial power grid from an external power source. When in the “on” position the circuit breaker serves as a main power input circuit breaker allowing power f... | 12/12/2006 |
| 7126801 | Polarity protection implemented with a MOSFET A polarity protection circuit contains a metal oxide semiconductor field effect transistor (FET) that pets its control voltage via an electrical connection from supply voltage lines and a transistor that pets its control voltage via another connection from the suppl... | 10/24/2006 |
| 7102866 | Power line protection A protection system for an electrical power line system of the type comprising radially connected power line sections, wherein a first electrically upstream one of the line sections is connectable to a power source. The protection system comprises at least one relay... | 09/05/2006 |
| 7082019 | Method and apparatus to protect solar cells from electrostatic discharge damage Methods and apparatuses are disclosed for protecting solar cells from cellular degradation caused by an electrostatic discharge pulse. In one embodiment, a diode may bypass current generated from an electrostatic discharge so that the pulse current does not reverse ... | 07/25/2006 |
| 7061214 | Single inductor dual output buck converter with frequency and time varying offset control A single-inductor dual-output buck converter and control method that facilitates power conversion by converting a single DC power source/supply into two separate DC outputs, each of which can be configured to provide a selected/desired voltage by selection of respec... | 06/13/2006 |
| 7012795 | Electromagnetic circuit breaker assembly having reverse polarity protection An electromagnetic circuit breaker assembly, comprising at least one circuit breaker, is provided with a reverse polarity circuit that reduces the voltage presented to the terminals of the circuit breaker to which it is electrically connected when the terminals are ... | 03/14/2006 |
| 7012793 | Power converter with polarity reversal and inrush current protection circuit A power converter for converting an input power into a desired output power adapted to a power-receiving device. The power converter includes a polarity reversal protection circuit preferably constructed with a schottky diode that is used to ensure the correct conne... | 03/14/2006 |
| 6963183 | Control circuit for a direct current motor The invention relates to a control circuit for a direct current motor with a reverse pole protection device, which is connected to the electric circuit of the electrolytic capacitor and the free-wheeling diode in order to reduce losses in the reverse pole protection... | 11/08/2005 |
| 6946752 | Input power stabilizing circuit An input power stabilizing circuit, adapted to be disposed between a DC power source and a load to which DC power from the source is to be supplied. Voltage on a capacitor in the input power stabilizing circuit is prevented as much as possible from causing reverse c... | 09/20/2005 |
| 6937452 | Reverse wiring detect in circuit interrupting devices A resettable circuit interrupting device having a switch and timer circuit connected to the line side of the interrupting device to cause a leakage current to flow for a defined interval of time when power is applied. The timer and switch circuit comprises a timer p... | 08/30/2005 |
| 6924647 | Fault location method and device The present invention relates to a method for calculating the distance to fault in a section of a power transmission network, which section is arranged with line terminals at both ends, each terminal including impedance relays (AA, BB), including the steps of, at th... | 08/02/2005 |
| 6922322 | High side reverse and overvoltage transient protection A high side reverse voltage and overvoltage protection circuit configuration comprising: a first switching device in operable communication with a transient protected voltage source; a second switching device in operable communication and in series with the first sw... | 07/26/2005 |
| 6919704 | Reverse battery protection for a trolling motor A trolling motor having reverse battery protection such that an inadvertent reversal of the battery leads, as when connecting the trolling motor to a battery, will not cause unwanted operation of the trolling motor or damage to the trolling motor circuitry. The reve... | 07/19/2005 |
| 6914762 | Protection of electrical power lines A method of protecting a section of a three phase power line uses superimposed current components in the power line to enable a local relay to detect operation of remote circuit breakers of remote relays in response to a fault on at least one phase of the power line... | 07/05/2005 |
| 6800802 | Circuit device for solar energy application A circuit device for solar energy application includes a solar panel as power supply and a rechargeable cell pack for receiving the power transferred from the solar panel. The circuit device uses a MOSFET as a current blocking device. The Drain and the Source of the... | 10/05/2004 |
| 6657836 | Polarity reversal tolerant electrical circuit for ESD protection An ESD protection circuit is provided which offers full protection for sub micron CMOS technology integrated circuits that does not have a latchup problem as in silicon controller rectifier circuits. The primary ESD protection transistor within the circui... | 12/02/2003 |
| 6654217 | Quick responding instantaneous trip system An assembly and method is provided for a tripping mechanism of an circuit breaker to limit the damage to a protected circuit breaker and other associated equipment such as enclosures, bus way, etc. from the high forces that result from high currents and p... | 11/25/2003 |
| 6650520 | Power supply reverse bias protection circuit for protecting both analog and digital devices coupled thereto All integrated circuits (ICs) require a power supply having a potential difference for use in powering internal integrated circuit components to ensure their operation. In some cases it is possible to inadvertently reverse the bias of the applied potentia... | 11/18/2003 |
