Invention Grant
- Patent Title: Power switch acceleration scheme for fast wakeup
- Patent Title (中): 电源开关加速方案快速唤醒
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Application No.: US13285269Application Date: 2011-10-31
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Publication No.: US08542054B2Publication Date: 2013-09-24
- Inventor: Toshinari Takayanagi , Shingo Suzuki
- Applicant: Toshinari Takayanagi , Shingo Suzuki
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- Agent Lawrence J. Merkel; Erik A. Heter
- Main IPC: H03K17/296
- IPC: H03K17/296

Abstract:
A method an apparatus for a power switch acceleration scheme during wakeup is disclosed. In one embodiment, an integrated circuit includes at least one power gated circuit block. The power gated circuit block includes a virtual voltage node from which a voltage is provided to the circuitry of the block when active. Power switches are coupled between the virtual voltage node and a corresponding global voltage node. When the power gated circuit block is powered on, power switches are activated sequentially. The rate at which power switches are activated is increased as the voltage on the virtual voltage node increases. Sequentially activating the power switches may prevent an excess of current inrush into the power gated circuit block. The increase in the rate at which power switches are activated when the voltage on the virtual voltage node is at least at a certain level may allow for a faster wakeup.
Public/Granted literature
- US20130106494A1 Power Switch Acceleration Scheme for Fast Wakeup Public/Granted day:2013-05-02
Information query
IPC分类: