Power-off circuit

Details Power-off circuit Power-off circuit

2006-12-11

2010-02-23

Du, Thuan N (Department: 2116)

Electrical computers and digital processing systems: support

Computer power control

C327S100000, C327S365000

Reexamination Certificate

active

07669065

ABSTRACT:
A power-off circuit includes a power unit (10), a power management unit (20), an integrated circuit chip (IC chip,40), a switching apparatus (30), and a clamp circuit (70). The switching apparatus produces and transmits a power-off instruction to the power management unit. The power management unit produces and transmits a power-off notice to the IC chip in accordance with the power-off instruction. And the IC chip feeds back a power-off affirmation in accordance with the power-off notice to the clamp circuit. The clamp circuit receives the power-off affirmation and produces and transmits interrupted power-off signals to the power management unit, till the power management unit completely cuts off power supplied from the power unit to the IC chip.

REFERENCES:
patent: 3810130 (1974-05-01), Schneider
patent: 5500546 (1996-03-01), Marum et al.
patent: 6359490 (2002-03-01), Oyamada
patent: 6794921 (2004-09-01), Abe et al.
patent: 6879193 (2005-04-01), Okamoto et al.

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