Invention Grant
- Patent Title: Power supply sequencing distributed among multiple devices with linked operation
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Application No.: US12001766Application Date: 2007-12-12
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Publication No.: US08484500B2Publication Date: 2013-07-09
- Inventor: Thomas J O'brien
- Applicant: Thomas J O'brien
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Fountainhead Law Group P.C.
- Main IPC: G06F1/00
- IPC: G06F1/00

Abstract:
A system and method is provided to accomplish distributed power sequencing function of a large electronics system with minimum number of signals in the sequencing network without compromising the flexibility and expandability. In one embodiment of the invention, the power sequencing function is accomplished with two signals of the sequencing network: power_on/power_off signal and SEQ_LINK signal. The power_on/power_off signal controls whether the sequencing is in power_on mode for turning on power to multiple devices in a predetermined sequence or power_off mode for for turning off power to multiple devices in a reverse sequence. The SEQ_LINK signal controls when the sequence counters, located in each participating device, are allowed to count to the subsequent state. Each sequencing logic circuit of these participating devices responds to a predetermined sequence position to enable the power on or power off of the power supply it controls.
Public/Granted literature
- US20090070613A1 Power supply sequencing distributed among multiple devices with linked operation Public/Granted day:2009-03-12
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