公开(公告)号：US07475374B1

公开(公告)日：2009-01-06

申请号：US11314698

申请日：2005-12-20

申请人： Scott C. Johnson ,  Don Walters ,  Ravinder Rachala ,  Jerry Moench

发明人： Scott C. Johnson ,  Don Walters ,  Ravinder Rachala ,  Jerry Moench

IPC分类号： G06F17/50 ,  G06F9/45

CPC分类号： G06F17/505 ,  G06F2217/62

摘要： Various embodiments of methods and systems for providing virtual leaf driver nodes in a clock tree to drive a clock grid of an integrated circuit are disclosed. An integrated circuit may include a large number of clocked elements such as registers, flip-flops, etc. whose operation is synchronized by one or more clocks. For example, an operation performed by circuitry on one side of the die may need to occur at precisely the same time as another operation performed by circuitry on the other side of the die. In order to assure synchronicity of these events, a clock grid may be provided in the IC that is driven by virtual leaf driver nodes. The clock tree driving the clock grid may include a tier of leaf buffers. The output of a leaf buffer may be split, and the branches of the output connected to separate points on the clock grid.

摘要翻译： 公开了用于在时钟树中提供虚拟叶驱动器节点以驱动集成电路的时钟网格的方法和系统的各种实施例。 集成电路可以包括大量的时钟元件，例如寄存器，触发器等，其操作通过一个或多个时钟同步。 例如，由芯片的一侧上的电路执行的操作可能需要在与芯片另一侧上的电路执行的另一操作完全相同的时间进行。 为了确保这些事件的同步性，可以在IC中提供由虚拟叶驱动器节点驱动的时钟网格。 驱动时钟网格的时钟树可以包括一层叶缓冲器。 叶片缓冲区的输出可能被分割，输出的分支连接到时钟网格上的分离点。