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    Bus capability voting mechanism
    4.
    发明授权
    Bus capability voting mechanism 失效
    总线能力投票机制

    公开(公告)号：US06941483B2

    公开(公告)日：2005-09-06

    申请号：US10038798

    申请日：2001-12-31

    申请人： John M. Brown ,  James E. Holeman

    发明人： John M. Brown ,  James E. Holeman

    IPC分类号： G06F13/40 ,  G06F1/04

    CPC分类号： G06F13/409

    摘要： A computer system is disclosed having a bus capability determination mechanism. In a preferred embodiment, the computer system includes a backplane having sockets into which system and peripheral boards may be inserted. The sockets are coupled together by a backplane bus that includes a bus capability line. Each board preferably includes a voting circuit that, when enabled, limits the voltage on the capability signal line to no more than a predetermined voltage that is indicative of the capability of the board. The voltage on the capability signal line will thus be determined by the board having the lowest voltage limit. The clock source for the bus can then be set to the clock rate indicated by the voltage on the capability signal line. Zener devices are preferably used to carry out the voting operation, and may be disabled after the voting operation is complete.

    摘要翻译： 公开了一种具有总线能力确定机构的计算机系统。 在优选实施例中，计算机系统包括具有可插入系统和外围板的插座的背板。 插座通过包括总线能力线的背板总线耦合在一起。 每个板最好包括一个投票电路，当启动时，能够将能力信号线上的电压限制在不超过指示电路板能力的预定电压。 因此，能力信号线上的电压将由具有最低电压限制的电路板确定。 然后，总线的时钟源可以设置为由能力信号线上的电压指示的时钟速率。 齐纳装置优选地用于执行投票操作，并且可以在投票操作完成之后被禁用。

    System and method for accelerating the rendering of graphics in a multi-pass rendering environment
    5.
    发明授权
    System and method for accelerating the rendering of graphics in a multi-pass rendering environment 有权
    用于在多遍渲染环境中加速图形渲染的系统和方法

    公开(公告)号：US06259461B1

    公开(公告)日：2001-07-10

    申请号：US09172564

    申请日：1998-10-14

    申请人： John M. Brown

    发明人： John M. Brown

    IPC分类号： G09G536

    CPC分类号： G06T15/40 ,  G06T15/005

    摘要： The present invention is directed to a method and apparatus for accelerating the performance of a multi-pass rendering operation. The method operates in a computer graphics system having an application program that interfaces through an application program interface (API) to a graphics pipeline, including a rendering pipeline and a frame buffer. The method includes the step of providing a visibility flag that is in communication with the application program to relay rendering information to the application program. The method clears the visibility flag upon sending new data to the rendering pipeline, and sets the visibility flag if data sent to the rendering pipeline from the application program is further communicated to the frame buffer for display. Thereafter, the method evaluates the visibility flag from within the application program after a first pass of a first segment of graphics data has been rendered by the rendering pipeline. If the visibility flag was not set during the first pass, then the application program inhibits the rendering of subsequent passes of the first segment of graphics data. If, however, the visibility flag was set during the first pass, then the application program will send subsequent passes of the graphics data to the rendering pipeline for processing and display.

    摘要翻译： 本发明涉及用于加速多遍渲染操作的性能的方法和装置。 该方法在具有应用程序的计算机图形系统中操作，该应用程序通过应用程序接口（API）与包括渲染流水线和帧缓冲器的图形流水线进行接口。 该方法包括提供与应用程序通信的可见性标志以将呈现信息中继到应用程序的步骤。 该方法在将新数据发送到渲染流水线时清除可见性标志，并且如果从应用程序发送到渲染流水线的数据进一步传送到帧缓冲器以进行显示，则设置可见性标志。 此后，该方法在渲染管线呈现第一段图形数据的第一遍之后，从应用程序中评估可见性标志。 如果在第一次通过期间未设置可见性标志，则应用程序禁止第一段图形数据的后续遍历的呈现。 然而，如果在第一次通过期间设置了可见性标志，则应用程序将将图形数据的后续传递发送到渲染管线进行处理和显示。

    Signal conditioning circuit for resistive sensors
    7.
    发明授权
    Signal conditioning circuit for resistive sensors 有权
    用于电阻式传感器的信号调理电路

    公开(公告)号：US06768318B2

    公开(公告)日：2004-07-27

    申请号：US10211794

    申请日：2002-08-02

    申请人： Rodney T. Burt ,  Thomas L. Botker ,  John M. Brown

    发明人： Rodney T. Burt ,  Thomas L. Botker ,  John M. Brown

    IPC分类号： G01R2728

    CPC分类号： H03F3/347 ,  H03F3/45475 ,  H03F3/45991 ,  H03F2200/261

    摘要： A circuit is provided that can provide, in a single package, a circuit to monitor a sensing element which uses a variable resistor. The circuit (also known as a signal conditioning circuit) may contain resistor input terminals to which a reference set resistor and a resistive sensor can be attached. A reference voltage signal can be applied to both terminals. There are also a circuit for sensing the resulting current flowing through both the set resistor and the resistive sensor. The difference of the currents flowing through each element can then be monitored as being indicative of the difference in resistance between the set resistor and the resistive sensor. The current difference signal can be used to generate a voltage difference signal indicative of the difference in resistance between the set resistor and the resistive sensor. The signal conditioning circuit may be used to adjust the temperature of various devices.

    摘要翻译： 提供一种电路，其可以在单个封装中提供用于监测使用可变电阻器的感测元件的电路。 电路（也称为信号调理电路）可以包含电阻器输入端子，参考电阻器和电阻传感器可附接到该电阻器输入端子。 参考电压信号可以应用于两个端子。 还有一个电路用于感测流过设定电阻和电阻传感器的所得电流。 然后可以监测流过每个元件的电流的差异，以指示设定电阻器和电阻式传感器之间的电阻差。 电流差信号可用于产生指示设定电阻和电阻式传感器之间的电阻差的电压差信号。 信号调节电路可用于调节各种装置的温度。

    Method for cataloging graphics primitives by rendering state
    9.
    发明授权
    Method for cataloging graphics primitives by rendering state 失效
    通过渲染状态对图形图元进行编目的方法

    公开(公告)号：US5889994A

    公开(公告)日：1999-03-30

    申请号：US775272

    申请日：1997-03-27

    申请人： John M. Brown ,  Gautam Mehrotra

    发明人： John M. Brown ,  Gautam Mehrotra

    IPC分类号： G06F11/34 ,  G06F3/048 ,  G06T15/00 ,  G06F12/00

    CPC分类号： G06T15/00

    摘要： A method according to the invention analyzes the generation of graphical images by cataloging primitives by the states in which they are rendered. It permits, for example, for analysis of the execution of a computer instruction sequence, e.g., a computer program, of the type that generates a graphical image from a plurality of primitives. The method includes the steps of identifying primitives rendered by the instruction sequence, along with the composite graphical states in which those primitives are rendered. The method further includes generating an output signal characterizing the program, i.e., via cataloging the primitives by the states in which they were rendered.

    摘要翻译： 根据本发明的方法通过对它们呈现的状态对原图进行编目来分析图形图像的生成。 例如，它允许分析从多个基元生成图形图像的类型的计算机指令序列（例如，计算机程序）的执行。 该方法包括以下步骤：识别由指令序列呈现的原语，以及呈现这些基元的复合图形状态。 该方法还包括产生表征该程序的输出信号，即，通过它们被呈现的状态对原图进行编目。