Ultra low power wake-up circuit

Details Ultra low power wake-up circuit Ultra low power wake-up circuit

2009-05-19

2011-10-18

Cao, Chun (Department: 2116)

Electrical computers and digital processing systems: support

Computer power control

C713S310000, C713S320000, C713S323000, C713S324000, C713S330000, C713S340000

Reexamination Certificate

active

08041964

ABSTRACT:
An apparatus for selectively enabling power including a power supply, and a device having a controller and an input activated by a user. The controller is selectively powered by the power supply. While the device is in a sleep state, a sensing circuit senses activation of the input by the user and enables the power supply to provide power to the controller in response to the sensed activation of the input by the user. A latch circuit causes the power supply to continue to provide power to the controller. The controller is responsive to the sensed activation of the input by the user for enabling the latch circuit and for disabling the latch circuit, thereby reentering the device into a sleep state.

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