Dell USA L P

Dell Corporate Services Corporation

Warren W Startup

Gregory N Stewart

N Albert Sato

A portable electronic system which includes a smart power-management controller. The power-management controller is programmable to vary its operational parameters (such as the time without input which will send the system into a standby mode). The power-management controller also has the capability to self-program at least some of these parameters: thus, for example, if a user repeatedly demands a system power-up soon after the system had been placed into standby mode, the inactivity period required for entering standby mode will be increased.

Portable computer system with adaptive power control parameters

A system for automatically adapting the power conservation functions of a personal computer (PC) to the work patterns of any user. A power control system of the PC monitors activity of I/O devices and if upon the elapse of a first time interval a particular I/O device or combination of devices has not been accessed, one or more I/O devices are powered-down. Following power-down, the first time interval is incrementally increased if I/O activity immediately occurs thereafter, prior to elapse of a second time interval. This process may repeat itself several times until the first time interval reaches a maximum value. Alternatively, if, following power-down, I/O activity does not occur until after elapse of a third time interval, the first time interval is incrementally decreased until the first time interval reaches a minimum value. The system thereby automatically adapts to maximize power conservation during periods of low activity while preventing user disruption during periods of increased activity.

Power management system with adaptive control parameters for portable

A system for accurately predicting impending battery failure in battery powered electronic and electrical devices. The system continually monitors changes in battery voltage responsive to load changes and calculates a ratio of the change in voltage to the change in load. When the ratio exceeds a certain threshold value, indicating that the impedance of the battery has risen to near its final value, a user warning indication is generated.

System for indicating a low battery condition

A portable electronic system, which can accurately predict impending battery failure, without using expensive comparators, by using voltage and current measurements to determine the source impedance of a battery. Preferably two banks of batteries are used, with a load-switching relay; the voltage and current of both banks is monitored, so that voltage drop under load can be monitored. Alternatively, the voltage variation of a single battery bank can simply be correlated to the current drawn by a changing load.

Growing community of inventors

Austin, TX, United States of America

Warren W Startup