Matches 151 - 200 out of 256 < 1 2 3 4 5 6 >
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6230265 Method and system for configuring resources in a data processing system utilizing system power control information  
A data processing system includes a plurality of components, a power control network, processing resources, and a memory that contains initialization firmware. At system startup, the power control...
6230285 Boot failure recovery  
A boot failure recovery system operates to diagnose a failed system boot in a computer operating system which boots by bootstrapping from a boot sector (12) of a storage medium (10) using...
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...
6202171 Power fault protection in a computer system having multiple power supplies  
A power system fault handling mechanism for portable electronic devices having multiple power supplies. A safety-net circuit is triggered when a power fault condition is detected. The safety-net...
6195754 Method and apparatus for tolerating power outages of variable duration in a multi-processor system  
An apparatus and method for tolerating failure of the AC power source in a power supply switchable between the AC power source and a battery, in a processor system having a set of one or more...
6189107 Fault tolerant voltage regulator module circuit for supplying core voltage and cache voltage to a processor  
A fault tolerant voltage regulator module (VRM) circuit for a processor simultaneously supplies a core voltage to a plurality of processors, has a plurality of main VRMs (VRM) for supplying the...
6170062 Fault detection on dual supply system for a universal serial bus system  
A method and apparatus for a dual power supply on a universal serial bus system using an overcurrent detect circuit. Dual power supplies in the universal serial bus system allows for greater...
6163849 Method of powering up or powering down a server to a maintenance state  
A fault tolerant method of powering up and powering down a server through either a local or remote client machine. The remote machine accesses the server by use of a dial-in modem connection, while...
6158020 Remote jumper set and reset  
A client on a network is provided with auxiliary low power logic, at the network adapter, that is always active and simulates network traffic (e.g. Ethernet format) normally sent under control of...
6144903 Electrical fault recognition system for vehicles  
An electrical fault recognition control is incorporated into a vehicle. The control includes a sensor which monitors the current and voltage draw from the battery, and identifies faults in the...
6125455 Power control device and method for USB  
A universal serial bus (USB) power control device includes a universal serial bus control circuit for controlling mutual information transmitted between a computer and its peripheral devices, using...
6122750 Apparatus for, and method of, isolating hardware and power source problems  
An apparatus is installed in a portable terminal to isolate hardware and power source problems and to quickly find the cause of a given problem occurring in the terminal. In the apparatus, a...
6072465 Portable information processing apparatus having selectably controllable video controller responsive to removal of display panel  
A portable information processing apparatus, having a detachable liquid crystal display panel/input tablet, whereof the liquid crystal display panel/input tablet can be detached from the apparatus...
6055647 Method and apparatus for determining computer system power supply redundancy level  
Apparatus, and an associated method, for determining the level of power supply redundancy in a modular computer system. Determination of the level of power supply redundancy is made dynamically,...
6035408 Portable computer with dual switchable processors for selectable power consumption  
A laptop computer has a first relatively powerful and fast data processor and a second relatively slower data processor. The first data processor has a higher power consumption factor than the...
6035358 Upgrade CPU module with integral power supply  
A computer processing unit (CPU) module is described. The present CPU module accommodates a CPU and includes a power supply, a power good detection circuit and a clock speed selector, all of which...
6014750 Techniques for distributing/supplying intra-computer DC power to external peripheral devices of a computer system  
Apparatus for adapting a personal computer unit having an internal power supply and a sidewall adapted for supplying associated external peripherals with DC power from the power supply. For each...
5958054 System and method for emulating an uninterruptable power supply (UPS) using a portable computer  
A portable computer including a chargeable battery and an AC line adapter controls the battery and adapter to emulate a full UPS-class device. A controller of the portable computer with the...
5954823 Redundant power distribution in an information processing system  
An information processing system comprises a plurality of information processing devices; and a fault-tolerant power distribution system comprising a plurality N+1, wherein N is greater than 1,...
5946495 Data communication circuit for controlling data communication between redundant power supplies and peripheral devices  
In a computer system having redundant power supplies, an I 2 C data bus architecture it utilized to provide communication between the power supplies and other computer peripherals connected to the...
5939799 Uninterruptible power supply with an automatic transfer switch  
Power is supplied to a load from either a first power source or a second power source. A transfer switch determines which of the power sources provides the power to the load. A switch control...
5935254 Computer system for cutting off power by key input signals or programming and having a reset switch for resetting and supplying power  
In a computer system, the supply of a source voltage to a main computer block is started by using a reset switch provided for resetting the main computer block and cut off by specific key input...
5928368 Method and apparatus for fault-tolerant multiprocessing system recovery from power failure or drop-outs  
Multiple processors are connected to form a multiprocessor system having interprocessor communicating capability. In the face of a power-fail signal, indicating that possible power loss is...
5925139 Microcomputer capable of preventing writing errors in a non-volatile memory  
When data are to be written in an EEPROM (1), a CPU (2) sets a flag (12). A voltage booster (13) boosts the power voltage in compliance with the setting of the flag (12). A voltage boost detector...
5923099 Intelligent backup power controller  
An intelligent backup controller performs graceful shutdown of a processing system upon the loss of main AC power. The power source supply is monitored to detect a switch from main AC power to...
5898828 Reduction of power used by transceivers in a data transmission loop  
Transceivers are selectively activated to reduce power in a network of data processing devices linked by a data transmission loop. Each of the devices is linked by a transceiver, and passes data...
5892893 Device for the bus-networked operation of an electronic unit with microcontroller, and its use  
A device for bus-networked operation of an electronic unit having microcontroller has a semiconductor circuit which is supplied from a superordinate potential, and is connected between a bus...
5881215 Apparatus and methods for providing robust powering  
A power system and method utilizes two independent AC lines to power an N+1 power supply configuration. The AC lines are selectively switched to supply power to the N+1 power supply configuration...
5875348 Information processing system  
Disclosed is a computer system that includes a CPU that can be operated both in a normal mode and in a power saving mode. The system further includes at least one peripheral device and a bus for...
5867718 Method and apparatus for waking up a computer system via a parallel port  
A method and apparatus for waking up a computer system using a peripheral device connected to a standard parallel port of the computer system. Functionality is added to the parallel port Select...
5845150 Modular digital dictation system with plurality of power sources and redundancy circuit which outputs service request signal in a source does not meet predetermined output level  
A modular digital dictation system that can be easily modified to service a variable number of dictation stations and transcription stations. The modular digital dictation station comprises a...
5842030 Memory storage system having swappable power supplies  
Disclosed herein is a power supply subsystem for use in a system such as a memory storage system. The power supply subsystem includes a housing, redundant load sharing power supplies and a power...
5835780 Apparatus and method for controlling power supply for computer system during service interruption  
Upon detection of service interruption, the power supply unit gives a notice of the occurrence of service interruption to the processor unit to instruct save operation from the memory unit to the...
5835706 Method of controlling data writing into on-board microcomputer  
A user board has an on-board microcomputer including a flash memory and an on-board writing program memory, a user circuit, a reset circuit, a first OR gate, and a second OR gate. A detected signal...
5831347 Apparatus for determining if the duration of a power failure exceeded predetermined limits  
In an electronic instrument subject to power line interruptions and having a standby power supply, an external timer is used to time a predetermined brief period (e.g. 15 seconds to 1 minute). If...
5825648 Backup system for a time of day clock in an electronic device  
A backup system for a time of day clock in an electronic device that enables a microprocessor to accurately maintain the time of day clock in the event of a power interruption. The backup system...
5815407 Method and device for inhibiting the operation of an electronic device during take-off and landing of an aircraft  
An apparatus (700) for inhibiting operation of an electronic device (702) during take-off and landing of an aircraft (802) has a sensor (704) that measures a lateral acceleration. A control circuit...
5809543 Fault tolerant extended processing complex for redundant nonvolatile file caching  
An outboard file cache extended processing complex for use with a host data processing system for providing closely coupled file caching capability is described. Data movers at the host provide the...
5805910 Computer hibernation system for transmitting data and command words between host and controller  
A computer system includes: a host unit, a power management system, a data backup power supply, a switching mode power supply, an auxiliary storage unit and a memory. The power management system...
5790878 System and method for recovering from a power failure within a digital camera device  
A system and method for recovering from a power failure in a digital camera comprises a power manager for detecting power failures, an interrupt handler for responsively incrementing a counter...
5784548 Modular mirrored cache memory battery backup system  
A battery backup mirrored cache memory module for a cache dynamic random access memory (DRAM) system that senses the V cc level supplied through the cache controller to the cache memory and, if...
5781434 Control system for communication apparatus  
An information processing system includes a modem communicating with a remote console through a telephone line, an information processing apparatus communicating with the remote console through the...
5781719 Semiconductor disk device having a large capacity of quick-access memory and hard disk for backup and its data storage method  
A semiconductor disk device for storing or outputting data in accordance with a write request from an outer unit or a read request comprising a volatile memory for writing input data from the outer...
5774736 Redundant CPU power system  
The present invention relates to a fault tolerant system for providing power to a multiple central processing unit computer system. Three DC-DC converters, each sized for providing power to one...
5765001 Computer system which is operative to change from a normal operating state to a suspend state when a power supply thereof detects that an external source is no longer providing power to said power supply at a predetermined level  
Described is a personal computer system which includes a central processing unit (CPU) and power management circuitry (PMC) in circuit communication with the CPU. A power supply is in circuit...
5754868 Electronic apparatus having conventional and battery power sources, and having a battery discharge mode wherein a first portion of the apparatus is powered by the conventional power source and a second portion of the apparatus is powered by the battery  
A data processing system that employs a rechargeable battery and supports a full discharge of the battery and that is not shut down even if a user mistakenly removes a battery while the system is...
5748971 Option card hibernation system  
A hibernation system of a computer employing option cards responds to a hibernation interrupt signal generated by a power management system in case of power failure or a period of non-use. In...
5745670 Fault tolerant power supply system  
A fault tolerant power supply system includes a plurality of devices coupled to a common power distribution bus. The devices are arranged and connected in a hierarchical order. The system provides...
5732281 Programmable power management circuit for a power supply in a computer system  
A programmable power management circuit for a computer which allows a power supply to be configured prior to and after bootup of the computer. A switch applies power from a power supply to a...
5717936 Data terminal and method of protecting memory items stored in non-persistent memory in a data terminal  
A data terminal, such as a personal digital assistant, personal computer, pager or other such device has a persistent memory (11), a non-persistent memory (12) including a memory item (15 or 16)...
Matches 151 - 200 out of 256 < 1 2 3 4 5 6 >