Power-on device and method for controllably powering a...

Details Power-on device and method for controllably powering a... Power-on device and method for controllably powering a...

2006-11-14

2006-11-14

Sparks, Donald (Department: 2187)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C320S128000

Reexamination Certificate

active

07135838

ABSTRACT:
A power-on method for a circuit system having a power supply terminal and a charge input terminal, comprising: coupling the power supply terminal to a battery and the charge input terminal to an adaptor; detecting a voltage of the battery; when the voltage of the battery is below a threshold, turning on a second switch such that the adaptor supplies the circuit system through the charge input terminal and the second switch to start the circuit system and charge the battery; when the voltage of the battery is above the threshold, turning off the second switch, and turning on a third switch, such that the charge input terminal is coupled to the battery through the third switch, and the circuit system is powered by the battery; and outputting a switch signal to control a first switch coupled between the adaptor and the charge input terminal for controlling charge capacity.

REFERENCES:
patent: 4163193 (1979-07-01), Kamiya
patent: 6744698 (2004-06-01), Koyama et al.
patent: 2001/0028571 (2001-10-01), Hanada et al.
patent: 2002/0171400 (2002-11-01), Koyama et al.
patent: 2004/0046528 (2004-03-01), Soyer
patent: 2000-139037 (2000-05-01), None
patent: 448600 (1999-12-01), None
patent: 448600 (2001-08-01), None

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