公开(公告)号：US08063664B2

公开(公告)日：2011-11-22

申请号：US12642651

申请日：2009-12-18

申请人： Lew G Chua-Eoan ,  Matthew L Severson ,  Sorin A Dobre ,  Tsvetomir P Petrov ,  Rajat Goel

发明人： Lew G Chua-Eoan ,  Matthew L Severson ,  Sorin A Dobre ,  Tsvetomir P Petrov ,  Rajat Goel

IPC分类号： H03K19/0175 ,  H03K19/094

CPC分类号： G06F1/3203 ,  G06F1/3287 ,  Y02D10/171

摘要： An integrated circuit includes multiple power domains. Supply current switch circuits (SCSCs) are distributed across each power domain. When a signal is present on a control node within a SCSC, the SCSC couples a local supply bus of the power domain to a global supply bus. An enable signal path extends through the SCSCs so that an enable signal can be propagated down a chain of SCSCs from control node to control node, thereby turning the SCSCs on one by one. When the domain is to be powered up, a control circuit asserts an enable signal that propagates down a first chain of SCSCs. After a programmable amount of time, the control circuit asserts a second enable signal that propagates down a second chain. By spreading the turning on of SCSCs over time, large currents that would otherwise be associated with coupling the local and global buses together are avoided.

摘要翻译： 集成电路包括多个电源域。 电源电流开关电路（SCSC）分布在每个电源域上。 当SCSC中的控制节点上存在信号时，SCSC将电源域的本地电源总线耦合到全局电源总线。 使能信号路径延伸穿过SCSC，使得使能信号可以从SCSC链从传播控制节点传播到控制节点，从而逐个转换SCSC。 当域要加电时，控制电路断言使第一链SCSC向下传播的使能信号。 在可编程的时间量之后，控制电路断言向下传播第二链的第二使能信号。 通过随着时间推移SCSC的接通，避免了将局部和全局总线连接在一起的大电流。