Computer battery pack charge current sensor with gain control

Details Computer battery pack charge current sensor with gain control Computer battery pack charge current sensor with gain control

1996-02-22

1997-08-19

Wong, Peter S.

Electrical generator or motor structure

Dynamoelectric

Linear

320 32, 320 48, H01M 1044, H02J 704

Patent

active

056592388

ABSTRACT:
A current switch is provided which selects and monitors charge and discharge states of a battery pack of a computer system. The current switch provides a current sense signal which is an indication of the current in the battery pack in order that a charge control circuit can monitor the charge state of the battery pack. The gain of the current sense signal is adjusted, depending on whether the battery pack is in a fast charging, trickle charging, or discharging state when the computer system is in a standby mode. Thus, the current switch provides a sufficient current sense signal for accurate current measurements while dissipating little power for the various battery pack charge states.

REFERENCES:
patent: 4609860 (1986-09-01), Fasen
patent: 5315228 (1994-05-01), Hess
patent: 5371456 (1994-12-01), Brainard
patent: 5514946 (1996-05-01), Lin
patent: 5554921 (1996-09-01), Li et al.
patent: 5576609 (1996-11-01), Brown et al.

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