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| Number | Title | Issue Date |
| 8174808 | Load driving device A load driving device according to an aspect of the present invention may includes an output transistor and a load connected in series between first and second power supply lines, a protection transistor connected between a gate of the output transistor and the seco... | 05/08/2012 |
| 8116051 | Power supply control circuit An exemplary aspect of a power supply control circuit includes a reference voltage control circuit that applies a potential corresponding to a potential of a second power supply line to a reference voltage node connected to a control terminal of a first switch when ... | 02/14/2012 |
| 8040647 | System and method for protection against loss of battery in reverse battery protected devices A system and method for protecting a reverse battery protected device during loss of battery are disclosed. An embodiment method includes biasing a substrate of a substrate switch of the reverse battery protected device to a lowest potential selected between a batte... | 10/18/2011 |
| 8000071 | Apparatus and method for reducing the die area of a PWM controller An apparatus and method for reducing the die area of a PWM controller include a protection circuit triggered by a fault index signal for counting, and the counting time is provided for a delay time required by fault verification. Therefore, fault detection circuits ... | 08/16/2011 |
| 8000070 | Motor control circuit with malfunction monitoring The invention relates to a control circuit which serves for security-critical control of a consumer with an inductive load portion, to be connected to a direct voltage source, and a method for failure control. It is in this case assumed that the control circuit has ... | 08/16/2011 |
| 7995317 | Dual voltage hot swap module power control A module hot swap circuit includes a low voltage-drop rectifier adapted to receive either positive or negative voltages of different absolute values. The rectifier is coupled to a power manager that provides dual startup/shutdown voltage thresholds and inrush curren... | 08/09/2011 |
| 7969700 | Electrical circuit for protecting photovoltaic systems The object of the present invention is to provide a structure for the electrical protection of photovoltaic facilities in the event a photovoltaic generator (G1-Gp) is connected with its polarity reversed, for what it includes a protection cell... | 06/28/2011 |
| 7889472 | Dual voltage hot swap module power control A module hot swap circuit includes a low voltage-drop rectifier adapted to receive either positive or negative voltages of different absolute values. The rectifier is coupled to a power manager that provides dual startup/shutdown voltage thresholds and inrush curren... | 02/15/2011 |
| 7719809 | Method and apparatus for distributing electrical power A method and apparatus for distributing electrical power is provided. In one embodiment, the apparatus includes: a semiconductor switch adapted to receive input power from a DC power source, adapted to distribute power to a DC/DC module, and adapted to receive a con... | 05/18/2010 |
| 7382594 | Method of forming an integrated voltage protection device and structure In one embodiment, a voltage protection circuit uses two back-to-back transistors to receive an unprotected voltage and form a protected voltage. ... | 06/03/2008 |
| 7366773 | Alternative communications paths for data sent over power line carrier Extensions to the concept of using a power line carrier to convey a data record from the secondary side of a first transformer to a receiver in a power distribution substation include receiving the data record over a secondary data path in the event that the primary... | 04/29/2008 |
| 7365951 | Discharge lamp lighting device, lighting system and method A method and apparatus for protecting a discharge lamp lighting device from damage due to mis-wiring of a source of electrical power to the discharge lamp lighting device. The protection apparatus includes a detector, a comparer and an inhibitor. The detector sample... | 04/29/2008 |
| 7362166 | Apparatus for polarity-inversion-protected supplying of an electronic component with an intermediate voltage from a supply voltage The apparatus for polarity-inversion-protected supplying of an electronic component with an intermediate voltage from a supply voltage has a first transistor connected between a terminal for the supply voltage and the electric component, so that a path between a sou... | 04/22/2008 |
| 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 |
| 7327122 | Battery heating circuit A battery delivers its rated capacity when the battery is below a temperature when the available battery capacity is limited. The battery includes a heating element, a temperature sensor, and a switch operatively connected to the heating element and temperature sens... | 02/05/2008 |
| 7312653 | NMOS reverse battery protection A reverse polarity protected system comprises a voltage source that includes positive and negative terminals. A polarity-sensitive device has a first terminal that communicates with the positive terminal of the voltage source, and that includes a second terminal. A ... | 12/25/2007 |
| 7283343 | Integrated reverse battery protection circuit for an external MOSFET switch A reverse battery protection circuits that provides an integrated reverse battery condition solution for protection of external NMOS switches during the reverse battery condition is disclosed herein. This reverse battery protection circuit minimizes power consumptio... | 10/16/2007 |
| 7279757 | Double-sided extended drain field effect transistor A double-sided extended drain field effect transistor that includes a gate terminal overlying a channel region in a substrate. The substrate includes a drain region of a first carrier type that is laterally separated from the channel region by a first RESURF region ... | 10/09/2007 |
| 7268508 | Direct current motor control circuit and wiper system using said circuit The invention relates to a direct current motor control circuit. The invention also relates to the use thereof in a windscreen wiper system for vehicles. An MOS FET transistor with an anti-parallel diode (M3) is serially mounted on the braking system (M2 | 09/11/2007 |
| 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 |
| 7254002 | Reverse conduction protection method and apparatus for a dual power supply driver The invention is a dual stage power supply with a protection circuit for preventing reverse conduction through the lower voltage driver of the dual stage power supply and excess power dissipation when the higher voltage driver is on. In one embodiment of the inventi... | 08/07/2007 |
| 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 |
| 7205581 | Thyristor structure and overvoltage protection configuration having the thyristor structure A thyristor structure having a first terminal, formed as a first region with a first conductivity type, is provided. A second region of a second conductivity type adjoins the first region. A third region of the first conductivity type, which adjoins the second regio... | 04/17/2007 |
| 7190207 | One way conductor A one way conductor includes a MOSFET and a driving device. The MOSFET has a source and a drain respectively serving a positive end P and a negative end N of the one way conductor. The driving device including a BJT differential amplifier detects a voltage differenc... | 03/13/2007 |
| 7190025 | Array of pull-up transistors for high voltage output circuit A pull-up transistor array for a high voltage output circuit is provided. The transistor array includes a semiconductor substrate, an epitaxial layer formed on the semiconductor substrate and N double diffused MOS transistors (DMOS transistors) laterally arranged on... | 03/13/2007 |
| 7177124 | Brushless DC fan motor driving circuit The present invention is a brushless DC fan motor driving circuit, comprising a control unit, a Hall element, a temperature sensor with negative temperature coefficient, and a motor, as tied in with a plurality of resistors, capacitors, diodes and transistors. Accor... | 02/13/2007 |
| 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 |
| 7139157 | System and method for protecting a load from a voltage source A field effect transistor (FET) is used as the protection circuit. The gate is grounded through an electrical element. The voltage source is connected to the drain of the FET. The load is connected to the source of the FET. At low input voltages, the FET conducts in... | 11/21/2006 |
| 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 |
| 7119999 | Pre-regulator with reverse current blocking An apparatus includes a blocking N-channel MOS (LDMOS) transistor that prevents current flow when the supply connection is reversed. When connected properly, the body diode conducts to provide a start-up function. A bias generator is employed to enable the low drop-... | 10/10/2006 |
| 7110231 | Adaptive protection system for a power-distribution network A preferred embodiment of a system comprises a recloser electrically coupled to a voltage source of a power-distribution network and adapted to isolate a section of a distribution feeder of the power-distribution network from the voltage source in response to an ove... | 09/19/2006 |
| 7106567 | 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 includes one or more hard disk drive integrated circuit chips residing on a board and a hard disk dr... | 09/12/2006 |
| 7085114 | Current direction detection An electrical circuit is provided for detecting direction of a current flowing on a line, in particular of a bus of a test equipment. The circuit comprises a sense resistor coupled within the line. A first comparator is connected with its positive input to the line ... | 08/01/2006 |
| 7061733 | Power supply cut-off device for a power rectifier A power supply cut-off circuit for breaking a connection between a power rectifier and a power supply line leading to a load. The cut-off circuit is adapted to be connected between the power rectifier and the power supply line and includes a switching circuit connec... | 06/13/2006 |
| 7057868 | Reverse current protection device A reverse current protection device includes one or more contactors in a power circuit that open to prevent current flow and close to allow current flow; an impedance buffer to invert voltage across the diode; a threshold detector to compare inverted voltage to a re... | 06/06/2006 |
| 7048196 | Data communication device A data communication device includes a first antenna; a semiconductor circuit for generating signals for use in outputting communication data through the first antenna, the semiconductor circuit having a CMOS configuration of a combination of a P-channel MOS transis... | 05/23/2006 |
| 7038522 | System and method for redundant power supply connection A system for connecting a receiver to a redundant power supply. The power supply units are connected to the receiver by means of a pair of control switches, each being connected in series between one of the power units and the receiver, and each having its intrinsic... | 05/02/2006 |
| 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 |
| 6975493 | Overvoltage transient protection for low side circuits A low side overvoltage protection circuit configuration comprising: a first switching device in operable communication with and disposed between a ground and a protected ground; a load in operable communication with and disposed between a voltage source and the prot... | 12/13/2005 |
| 6969971 | Reverse battery protection circuit A reverse battery protection circuit comprising a first controlled semiconductor switch for providing current to a load and coupled in series with load terminals across which load terminals the load is adapted to be connected and a second controlled semiconductor sw... | 11/29/2005 |
