公开(公告)号：US06874047B1

公开(公告)日：2005-03-29

申请号：US09591044

申请日：2000-06-09

申请人： Christopher J. Duguay ,  Robert Reissfelder ,  Robert F. Turnbull ,  Michael K. Brown

发明人： Christopher J. Duguay ,  Robert Reissfelder ,  Robert F. Turnbull ,  Michael K. Brown

IPC分类号： G06F13/00 ,  G06F13/42

CPC分类号： G06F13/4291

摘要： A system and method for implementing an SMBus/I2C interface in a computer connectable to a network. The system includes a plurality of devices communicably coupled to an SMBus. The system operates at a first clock rate when the system is awake, and at a second clock rate less than the first clock rate when the system is sleeping. At least when the system is sleeping, a first device stores data transferred via the SMBus in a register, and a second device drives the clock line of the SMBus to a low logic level while the data is stored in the register of the first device. Upon completion of the data transfer operation, the first device clears the data from the register, and the second device releases the clock line to allow it to be pulled-up by pull-up circuitry connected to the SMBus.

摘要翻译： 一种用于在可连接到网络的计算机中实现SMBus / I 2 C接口的系统和方法。 该系统包括可通信地耦合到SMBus的多个设备。 当系统清醒时，系统以第一时钟速率工作，并且在系统正在休眠时以第一时钟速率小于第一时钟速率。 至少当系统正在休眠时，第一设备将经由SMBus传送的数据存储在寄存器中，并且第二设备将SMBus的时钟线驱动到低逻辑电平，同时将数据存储在第一设备的寄存器中。 完成数据传输操作后，第一个设备从寄存器中清除数据，第二个设备释放时钟线，以允许其通过与SMBus相连的上拉电路进行上拉。

公开(公告)号：US5455492A

公开(公告)日：1995-10-03

申请号：US107488

申请日：1993-08-17

申请人： Robert F. Turnbull

发明人： Robert F. Turnbull

IPC分类号： H04N3/26 ,  G09G1/04 ,  H01J29/58

CPC分类号： H04N3/26

摘要： Dynamic focus circuits for generating a dynamic focus signal for focusing an electron beam on a CRT, the signal being proportional to a function of the vertical deflection Y and horizontal deflection X of the beam according to X.sup.2 +Y.sup.2 +X.sup.2 f(Y) or X.sup.2 +Y.sup.2 +Y.sup.2 f(X), where f(Y) or f(X) is a positive symmetric function. The resultant dynamic focus signal has increased magnitude as the beam moves away from the center of the screen, thus providing proper focusing at the corners of the screen as well as at the center and sides of the screen.

摘要翻译： 用于产生用于将电子束聚焦在CRT上的动态聚焦信号的动态聚焦电路，该信号与根据X2 + Y2 + X2f（Y）或X2 +（X）的垂直偏转Y和光束的水平偏转X的函数成比例， Y2 + Y2f（X），其中f（Y）或f（X）是正对称函数。 所得的动态聚焦信号随着光束远离屏幕中心而增加幅度，从而在屏幕的角部以及屏幕的中心和侧面提供适当的聚焦。