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7446434 Dual mode power management system  
A power management system has a primary power source ( 100 ) and a secondary power source ( 106 ) generated from the primary power source ( 100 ) with a power output selector ( 204 ) coupled to...
7417336 Combination current hysteresis and voltage hysteresis control for a power converter  
Consistent with an aspect of the present disclosure, a method is provided for controlling an AC signal, which is supplied to a load and selectively supplied to a utility grid. In response to a...
7375442 Interface circuit for providing a computer logic circuit with first and second voltages and an associated method  
A universal interface circuit and an associated method are provided that can supply a computer logic circuit, such as the components mounted upon an adapter card, with first and second inputs...
7334137 Memory interface systems that couple a memory to a memory controller and are responsive to a terminal voltage that is independent of supply voltages for the memory and the memory controller  
Memory interface systems include one or more channel lines that couple a memory to a memory controller such that the channel line(s) are responsive to a terminal voltage that is independent of...
7332896 Apparatus and method for controlling supply voltage in multiple interface card  
An apparatus and method for controlling a supply voltage of a multiple interface card includes a first voltage adjustment unit, a second voltage adjustment unit, an internal circuit, a first...
7276815 Power management system  
A method of managing power resources for an electrical system of a vehicle may include identifying enabled power sources from among a plurality of power sources in electrical communication with the...
7274115 Method and apparatus for powering electronic circuits  
A method and apparatus for powering an electronic circuit use comparators of supply voltages and voltage regulators to facilitate powering the electronic circuit utilizing more than one supply...
7256517 Interface circuit for providing a computer logic circuit with first and second voltages and an associated method  
A universal interface circuit and an associated method are provided that can supply a computer logic circuit, such as the components mounted upon an adapter card, with first and second inputs...
7106607 Combined AC-DC to DC converter  
The invention relates to a combined AC-DC to DC converter. The converter provides the option of coupling to an AC supply source with at least one phase and the further option of coupling to at...
7105947 Method and system for voltage tracking and sequencing in a power supply  
A method for controlling multiple voltages in a power supply includes providing a plurality of DC to DC power converters. Each power converter includes a pulse width modulator controller having a...
7088015 Smooth voltage regulation transition circuit having fast recovery  
A power supply switching circuit arrangement is configured to provide a relatively smooth (low noise) power supply switch-over during the transition between active and quiescent modes....
7045915 Power supply unit having multiple power supply outputs  
A power supply unit (system power supply IC) has a multiplicity of power supply circuits providing for different supply voltages. Should an abnormal condition take place in any of the multiple...
7009859 Dual input DC-DC power converter integrating high/low voltage sources  
A dual input DC—DC power converter integrating high/low voltages can simultaneously or individually transfer the power from two input power sources respectively having voltages higher than and...
6982499 Power converting method and apparatus  
A power converter that can be used in a vehicle equipped with an electrical motor provides power to both the electrical motor and other, auxiliary loads, such as a headlamp, that require a...
6953915 Switching system for plural simmer voltages  
A combination selector switch and infinite switch energy regulator provides a plurality of simmer voltages. An infinite switch energy regulator for adapting input voltage level to an average output...
6950764 Arrangements to detect and respond to disturbances in electrical power systems  
A control arrangement and method is provided for detecting and responding to disturbances in electrical power systems. In a preferred arrangement, an integration is initiated that is based on a...
6805579 Electrical power cord with multiple low-voltage terminal  
An electrical power cord for providing low-voltage alternating current outputs from a high-voltage alternating current source. The cord includes an input terminal that is operable to receive power...
6668232 Arrangements to detect and respond to disturbances in electrical power systems  
A control arrangement and method is provided for detecting and responding to disturbances in electrical power systems. In a preferred arrangement, an integration is initiated that is based on a...
6614130 Balanced modular power management system and method  
An electrical distribution system and method has storage battery mechanism of very large equivalent capacitance providing excellent ripple filtering and an ideal path to ground, and filter...
6441590 Two stage architecture for a monitor power supply  
A power supply according to the principles of the inventions comprises two stages. The first stage is a power factor corrector stage. This stage provides the required line regulation, including...
6437462 Bi-directional DC/DC converter and control method therefor  
Method and system for bi-directionally controlling power flow between two separate direct current power sources in a multi-stage power converter system are provided. The method allows providing at...
6430692 Series-parallel battery array conversion  
A battery backup system has a number of batteries and number of switches interconnecting the batteries to either a high-power load or a low-power load. The batteries are selectively connected in...
6333570 Power supply system with two batteries of different voltage  
A power supply system contains two batteries and a load device which is connected to the batteries such that, upon failure of one of the batteries, the other takes over the supply of power. The...
6320358 Bidirectional energy management system independent of voltage and polarity  
An energy management system for a motor vehicle has a first voltage supply terminal having a first nominal voltage and a second voltage supply terminal having a second nominal voltage. At least one...
6281463 Power supply device for electric discharge machine  
A power supply device for an electric discharge machine for supplying power to a work gap (6) formed between a work piece and a tool electrode, includes a parallel circuit in which a first power...
6252310 Balanced modular power management system and method  
An electrical distribution system and method has storage battery mechanism of very large equivalent capacitance providing excellent ripple filtering and an ideal path to ground, and filter...
6211579 Multiple output converter having a low power dissipation cross regulation compensation circuit  
A compensation circuit for a DC--DC converter having a low voltage output line and a plurality of high voltage output lines applied to a plurality of loads includes an adjustable impedance source...
6205500 System and method for electrically isolating a device from higher voltage devices  
An isolation system and method that electrically couples a device to a bus during cycles associated with or accessing the device, but otherwise isolates the device from the bus. The isolation...
6169341 Power supplying adapter, electronic equipment, and signal transmission system  
A power supplying adapter which is connected to an AC power source and generates a predetermined DC voltage is constructed by a power supplying unit in which a small power mode to output a small...
6163085 Method and apparatus for selecting input voltage for a power supply  
A power supply that receives an input voltage and provides output power is described. A method for selecting one of a plurality of input voltages by moving first and second links is also described....
6097009 Heating apparatus and circuit control  
A heating assembly, for use as an electric blanket or personal heating pad, includes a flexible heating panel and an electric circuit for heating the panel. An electrical heating element is mounted...
6072249 Power source device  
A power source device in which, even in case of mistaken connection of a source power supplying cable, the supply of source power can be halted before destruction of an electronic equipment or of...
6064124 Power supplying apparatus for use in an image forming apparatus  
In a power supplying apparatus for use in an image forming apparatus, when a first transistor is switched on, a first photo-triac coupler and a first triac switch on so that a fixing heater is...
6049142 Voltage adapting system and method using modular adapter plugs  
An adapter including: a receiver for receiving first and second voltages as an input; a conversion circuit; and first and second connectors on the receiver. The first connector can be releasably...
5930096 Overvoltage and surge protection circuit in a hard disk drive  
An overvoltage and surge protection circuit for a hard disk drive is provided. The overvoltage and surge protection circuit is intended for protecting an interior circuit part from a surge voltage...
5929539 Semiconductor memory device adaptable to external power supplies of different voltage levels  
A semiconductor memory device includes a plurality of external power supply pads P1 to P3. Connection between external power supply pads P1 to P3 and an external power supply is determined in...
5923551 Combined boost/flyback power convertor  
An avionics power conversion circuit having a first input adapted to receive an AC input signal, a second input adapted to receive a DC input signal and an output at which converted signals are...
5917354 Circuit for resetting output of positive/negative high voltage generating circuit to VCC/VSS  
When a state of outputting a third power supply potential to an output node is switched to a state of outputting a second power supply potential, connection between a supply unit of the second...
5786642 Modular power management system and method  
An electrical distribution system and method has storage battery mechanism of very large equivalent capacitance providing excellent ripple filtering and an ideal path to ground, and filter...
5764007 Micro-processor based motor control integrated circuit including a boost regulated DC-to-DC converter  
A single chip integrated circuit includes a boost regulated DC-to-DC converter and gate drive circuits integrated on the same die with a micro-processor, along with high density digital logic...
5761073 Programmable apparatus for synchronizing frequency and phase of two voltage sources  
A programmable autosynchronizer for use with a system having generator and bus voltages and having a breaker circuit for connecting the generator and bus voltages to each other. The...
5758100 Dual voltage module interconnect  
A component card interconnect apparatus for coupling a component card to a computer system. A component card includes a first group of in-line pins with first power pins for conveying a first...
5712553 Battery transposition system and method  
A battery power supply transposition circuit has been provided to control the use of batteries in a power source supplying multiple voltages from multiple batteries that share a least one common...
5691630 Power supply control apparatus  
A power supply control apparatus for controlling a power supply circuit for outputting voltages of at least two systems is constructed by a first power supply circuit for generating a first voltage...
5650672 High-voltage power multiplexor  
A multiplexor having a multiplexor control input terminal for selectively providing one of a plurality of conductor voltage levels to a conductor. The multiplexor includes a first switch, which is...
5640060 Apparatus for synchronizing frequency and phase of two voltage sources  
An autosynchronizer for use with a system having generator and bus voltages and having a breaker circuit for connecting the generator and bus voltages to each other. The autosynchronizer...
5550729 Power sequencing control  
An apparatus for sequencing turn-on and turn-off of power converters includes a first DC to DC converter responsive to a control signal for asserting a voltage supply signal and a sense circuit...
5534768 Regulated power supply having wide input AC/DC voltage range  
A regulated power supply automatically accommodates either a positive or negative polarity connection of a power source and without regard as to whether the source is an DC or an AC source, and...
5530296 Power supply switching apparatus  
A power supply switching apparatus for switching power supplies used to all electronic appliance such as a pager and a portable telephone is described. A battery pack includes a battery and is...
5422518 Electric power supply system using multiple power sources  
A power supply system of a high reliability and stability capable of suppressing a cross current flow by establishing rapidly synchronism between a power converter and an AC power source in a...
Matches 1 - 50 out of 139 1 2 3 >