Matches 51 - 100 out of 350 < 1 2 3 4 5 6 7 >
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7106566 Power adapter interface circuitry for protecting a battery operated system  
An integrated circuit (IC) has logic and timing circuits that are coupled to discrete circuitry to provide protection and indications whenever an AC adapter that is faulty or has improper voltage...
7085117 EMC immunity improvements to USB interface  
A USB interface having improved EMC immunity where the D+, D−, and USB ground lines each pass through a common mode choke. The USB 5 V line is AC coupled to the USB ground line outside the choke...
7054123 Circuit configuration for identifying a fault state  
To identify a fault state, for example, a break in a supply line, while maintaining operational reliability, a circuit configuration for identifying a fault state includes a first transistor of a...
7049767 High voltage offset detection circuit and method  
A high voltage offset detection circuit registers the voltage at the midpoint of a switching half-bridge to determine when the midpoint voltage reaches a given value to avoid hard-switching in the...
7031128 Power circuit protection apparatus  
A power circuit protection apparatus halting an operation of a pulse width modulation (PWM) controller when an abnormal state is generated due to an open or short in a secondary side winding of a...
7019366 Electrostatic discharge performance of a silicon structure and efficient use of area with electrostatic discharge protective device under the pad approach and adjustment of via configuration thereto to control drain junction resistance  
More efficient use of silicon area is achieved by incorporating an electrostatic discharge protective (ESDP) device beneath a pad area of a semiconductor structure. The pad area includes a...
7016173 Device for detecting and protecting power connections and method thereof  
A device and method of detecting and protecting the power connections of a data processing system. The object of the invention is to determine the status of the power connections between each...
6992463 Battery protection circuit  
A protection of battery system having battery cells Cell 1˜ Cell 3 , FET switches SW 1 , SW 2 that are connected to the high-side path and control on/off state of the path, as well as fuse F 1 ...
6975076 Charge pump circuit to operate control circuit  
In accordance with one aspect of the present application a ballast for operating a lamp includes an inverter circuit configured to generate a control signal. A resonant circuit is configured for...
6972940 Power supply protection circuit  
A power supply protection circuit for stopping a power supply to electrical equipments in case a normal power voltage is not outputted from a direct current power supply and an excess voltage or a...
6952085 Continuous mode ballast with pulsed operation  
In accordance with one aspect of the present application, a continuous mode electronic ballast for operating an HID lamp includes an inverter circuit configured to generate a control signal. A...
6922319 Adaptively controlled circuit  
Adaptively controlled circuits are provided that can include an output buffer circuit, a sensing circuit, and a current conversion circuit. The output buffer circuit can include, for example,...
6894882 D.C. power supply circuit and electronic apparatus using such circuits  
The present invention relates generally to D.C. power supplies and more particularly to overvoltage protection in one or more D.C. power supply circuits, where a plurality of D.C. power supplies...
6891708 Reduced current and power consumption structure of drive circuit  
A drive circuit for driving a switching element is provided which includes a high-side switching circuit connected between power supply lines, a low-side switching circuit connected in series with...
6850396 Fail safe circuit with reset capability for a power supply  
Aspects of a fail safe circuit for protecting power supply operation from a failure are described. The fail safe circuit shutdowns at least one power supply when a preset threshold is exceeded and...
6842320 Hot-pluggable over-voltage tolerant input/output circuit  
Embodiments of the present invention provide a drive and biasing circuit for an input/output stage of a device. Embodiments of the present invention provide live-insertion protection by driving and...
6836393 Resonance type power supply unit  
A power supply unit designed to control a power output and protect an overload easily, economically with little loss. A DC output which is generated by smoothing a rectified current of a rectifier...
6819539 Method for circuit recovery from overstress conditions  
A method for circuit recovery from overstress conditions, comprising the steps of (A) detecting an event and (B) resetting a device when the event is a first predetermined type and providing...
6819538 Method and apparatus for controlling current demand in an integrated circuit  
The present invention relates generally methods and apparatus for controlling current demand in an integrated circuit. One embodiment relates to a method that includes detecting if a supply voltage...
6816350 AC voltage protection circuit  
An over-voltage protection circuit for protecting against excessive voltages on the power line, neutral line and ground line. A voltage detection circuit is coupled and monitors the interterminal...
6804098 Charge/discharge protection circuit for a rechargeable battery  
The invention refers to a charge/discharge protection circuit for a rechargeable battery being able to differentiate between a temporary overvoltage on the charge/discharge terminals and a...
6801009 Current limitation process of brush and brushless DC motors during severe voltage changes  
A closed-loop control system for a DC motor includes a DC motor 12 , a current sensor 14 for determining a current of the motor, a voltage sensor 32 for measuring a voltage of the motor 12 ,...
6791809 Charge/discharge protection circuit  
A charge/discharge protection circuit with n parallel load current switches and a control logic for the latter, which in an over-voltage event disconnects the battery from the charge/discharge...
6788509 Apparatus for protection of electronic circuits  
The invention relates to an apparatus ( 1 ) for protection of electronic circuits with a decentralized power supply (PS 1 , PS 2 ). One object of the invention is to avoid damage to other loads (PN...
6785107 Power sequence protection for a level shifter  
A method of power sequence protection for a level shifter is disclosed that includes the steps of placing the level shifter in a pre-selected state if an input voltage supply is not powered on when...
6775118 Supply voltage reference circuit  
A supply reference voltage circuit is coupled to an output node, a supply voltage node and a supply reference voltage node and is operable to connect the output node to the supply reference voltage...
6751079 Circuit for the detection of short voltage glitches in a supply voltage  
The invention relates to a circuit for the detection of short voltage glitches in a supply voltage Vsup (glitch detector). According to the circuit the two inputs (VN, VP) of a comparator (C) are...
6747300 H-bridge drive utilizing a pair of high and low side MOSFETs in a common insulation housing  
A fully protected H-bridge for a d-c motor consists of two high side MOSFETs and a control and logic IC on a first conductive heat sink all within a first package and two discrete low side MOSFETs....
6738248 ESD protection circuit for low amplitude signals  
An over-voltage protected integrated circuit is provided, which includes a discharge node, an input-output pad, a signal trace, which is coupled to the input-output pad, and a pair of back-to-back...
6731484 Integrated high voltage transient surge suppression with automatic transfer switch for alternate source of electricity  
An integrated transient voltage surge suppression system and automatic power transfer switch which includes a framework, an automatic transfer switch mounted to the framework, the automatic...
6731485 Digital power inverter  
A digital electric power inverter comprising: a CPU, a PWM driving circuit, a PWM converting circuit, a rectifying circuit, an AC driving circuit, a DC/AC inverting circuit, an overload detecting...
6724588 Power supply selector  
A data processing system power supply selection device. The system power supply selector circuit can include a first make-without-break power supply selector module having a power supply input, at...
6714396 Undervoltage tripping device  
An undervoltage tripping device for a multipolar low-voltage switching device is described. The tripping device contains an electromagnetic tripping mechanism for effectuating a tripping of the...
6646846 Apparatus and method for staged power load transfer  
An apparatus for isolating electrical loads during a power supply transfer interruption event, including an electrical circuit interposed between an electrical power source and a load which has a...
6646849 Digital power inverter and method of controlling the same  
A digital electric power inverter comprising: a CPU, a PWM driving circuit, a PWM converting circuit, a rectifying circuit, an AC driving circuit, a DC/AC inverting circuit, a plurality of...
6643110 Stress-follower circuit configuration  
Briefly, in accordance with one embodiment of the invention, an integrated circuit includes: a stress-follower circuit configuration. The stress-follower circuit of the configuration is coupled to...
6621674 Electric supply unit for plasma installations  
What is described here is a power supply unit for plasma systems such as plasma processing or coating devices, wherein electric arcs or disruptive breakdown may occur, which originate from an...
6615146 Failure detection of an isolation device with PFA signal generation in a redundant power supply system  
Aspects of failure detection of an isolation device in a power supply of a redundant power supply system are described. The aspects include an isolation device coupled to a voltage input line of a...
6603285 Power circuit, power supply method, and electronic device  
A power circuit is provided so that a charge can be normally driven even during replacement of a first battery. This power circuit comprises: first and second batteries for driving a charge; a...
6600723 Process for testing and ensuring the availability of a networked system  
A method for testing and safeguarding the availability of a networked system which is assigned to a system carrier, wherein a multiplicity of subscribers exchange data via a bus-type network which...
6587323 Dual pseudo reference voltage generation for receivers  
A circuit including a power supply plane, a ground supply plane, and a signal source that generates reference voltage signals and a first signal. The signal source includes a driver adapted to...
6577483 Dynamic braking method and apparatus  
An apparatus for decreasing speed of an inverter driven inertial load within a time period for use with a dynamic brake across a DC link including a controller for controlling the inverter to...
6567252 Protection circuit for a power supply unit and respective power supply unit  
The protection circuit for a power supply unit comprises a switching stage, at which at least two output voltages to be monitored are connected, these voltages being isolated from one another by...
6549386 Protection circuit for a switch, and a switched-mode power supply  
The protection circuit for a switch has an energy-storage means, which is connected to a control input of the switch and which is charged with a delay via resistance means when a control voltage is...
6529059 Output stage ESD protection for an integrated circuit  
An integrated circuit including a transistor having a first electrode coupled to an output bond pad and a second electrode coupled to a reference potential, such as ground bond pad. A degeneration...
6529354 Power-up and no-load/light load protective mechanisms for DC:DC converters  
Switching circuits including DC:DC converters of various topologies are provided with a soft-start mechanism that ensures safe start-up operation. The mechanism causes the converter switches to be...
6498437 Short circuit protection for multiple lamp LCD backlight ballasts with PWM dimming  
A lamp ballast for energizing a lamp has short circuit protection. The lamp ballast contains a transformer that provides an output voltage to the lamp. The transformer has a primary winding, a...
6487059 Switching mode power supply device with detection of malfunctioning  
The power supply device includes a DC-DC converter circuit having a power switch and a driving stage. The driving stage has a compensation terminal on which a compensation voltage is present, and...
6473282 Latch-up protection circuit for integrated circuits biased with multiple power supplies and its method  
A latch-up protection circuit for an integrated circuit powered through a first power rail and a second power rail is disclosed, the integrated circuit having at least one semiconductor bulk of a...
6452235 Floating body ESD protection circuit  
A floating body ESD protection circuit positioned between and coupled to an I/O pad and an internal circuit. A p-type depletion mode transistor is used to control the body of an n-type enhancement...
Matches 51 - 100 out of 350 < 1 2 3 4 5 6 7 >