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    Programmable logic device having an embedded differential clock tree
    31.
    发明授权
    Programmable logic device having an embedded differential clock tree 有权
    具有嵌入式差分时钟树的可编程逻辑器件

    公开(公告)号：US07126406B2

    公开(公告)日：2006-10-24

    申请号：US10837009

    申请日：2004-04-30

    申请人： Vasisht Mantra Vadi ,  Steven P. Young ,  Atul V. Ghia ,  Adebabay M. Bekele ,  Suresh M. Menon

    发明人： Vasisht Mantra Vadi ,  Steven P. Young ,  Atul V. Ghia ,  Adebabay M. Bekele ,  Suresh M. Menon

    IPC分类号： G06F1/04 ,  H03K3/00

    CPC分类号： G06F1/10 ,  H03K5/15013 ,  H03K19/1774 ,  H03K19/17784 ,  H03K19/17796

    摘要： A clock distribution network having: a backbone clock signal line configured to provide a differential clock signal; multiple branches coupled to the backbone clock signal line for distributing the differential clock signal to multiple programmable function elements; a first leaf node coupled to a first branch, where the first leaf node is configured to provide the differential clock signal to a first programmable function element; and a second leaf node coupled to a second branch, where the second leaf node is configured to provide a single ended clock signal derived from the differential clock signal to a second programmable function element.

    摘要翻译： 一种时钟分配网络，具有：骨干时钟信号线，被配置为提供差分时钟信号; 多个分支耦合到主干时钟信号线，用于将差分时钟信号分配给多个可编程功能元件; 耦合到第一分支的第一叶节点，其中所述第一叶节点被配置为将所述差分时钟信号提供给第一可编程功能元件; 以及耦合到第二分支的第二叶节点，其中所述第二叶节点被配置为将从所述差分时钟信号导出的单端时钟信号提供给第二可编程功能元件。

    Variable data width operation in multi-gigabit transceivers on a programmable logic device
    33.
    发明授权
    Variable data width operation in multi-gigabit transceivers on a programmable logic device 有权
    可编程逻辑器件上的千兆位收发器中的可变数据宽度操作

    公开(公告)号：US06960933B1

    公开(公告)日：2005-11-01

    申请号：US10618146

    申请日：2003-07-11

    申请人： Warren E. Cory ,  Hare K. Verma ,  Atul V. Ghia ,  Paul T. Sasaki ,  Suresh M. Menon

    发明人： Warren E. Cory ,  Hare K. Verma ,  Atul V. Ghia ,  Paul T. Sasaki ,  Suresh M. Menon

    IPC分类号： H03K19/177 ,  H04L25/45

    CPC分类号： H03K19/1774 ,  H03K19/17744 ,  H04L25/45

    摘要： A transmit variable-width interface can be programmed to convert an electronic digital data path that is either 1N, 2N, 4N, or 8N bits wide into a data path that is 2N bits wide, either by serializing bits (4N- or 8N-bit cases), re-clocking bits (2N-bit case), or grouping bits (1N-bit case). A receive variable-width interface can be programmed to convert a data path 2N bits wide into a data path that is 1N, 2N, 4N, or 8N bits wide. The widths of the two variable-width data paths are controlled independently. The variable-width interfaces are coupled between a multi-gigabit transceiver and core logic of a programmable logic device. The incoming and outgoing data paths of the variable-width interfaces have separate clocks signals that are synchronized such that small amounts of skew in these clock signals do not disrupt the operation of the variable-width interfaces.

    摘要翻译： 传输可变宽度接口可编程为将1N，2N，4N或8N位宽的电子数字数据路径转换为2N位宽的数据通道，通过将位（4N或8N位） 情况），重新计时位（2N位情况）或分组位（1N位情况）。 接收可变宽度接口可以被编程为将2N位宽的数据路径转换成1N，2N，4N或8N位宽的数据路径。 两个可变宽度数据路径的宽度被独立地控制。 可变宽度接口耦合在可编程逻辑器件的千兆位收发器和核心逻辑之间。 可变宽度接口的输入和输出数据路径具有同步的分离时钟信号，使得这些时钟信号中的少量偏移不会中断可变宽度接口的操作。

    Variable data width operation in multi-gigabit transceivers on a programmable logic device
    34.
    发明授权
    Variable data width operation in multi-gigabit transceivers on a programmable logic device 有权
    可编程逻辑器件上的千兆位收发器中的可变数据宽度操作

    公开(公告)号：US06617877B1

    公开(公告)日：2003-09-09

    申请号：US10090286

    申请日：2002-03-01

    申请人： Warren E. Cory ,  Hare K. Verma ,  Atul V. Ghia ,  Paul T. Sasaki ,  Suresh M. Menon

    发明人： Warren E. Cory ,  Hare K. Verma ,  Atul V. Ghia ,  Paul T. Sasaki ,  Suresh M. Menon

    IPC分类号： H03K19177

    CPC分类号： H03K19/1774 ,  H03K19/17744 ,  H04L25/45

    摘要： A transmit variable-width interface can be programmed to convert an electronic digital data path that is either 1N, 2N, 4N, or 8N bits wide into a data path that is 2N bits wide, either by serializing bits (4N- or 8N-bit cases), re-clocking bits (2N-bit case), or grouping bits (1N-bit case). A receive variable-width interface can be programmed to convert a data path 2N bits wide into a data path that is 1N, 2N, 4N, or 8N bits wide. The widths of the two variable-width data paths are controlled independently. The variable-width interfaces are coupled between a multi-gigabit transceiver and core logic of a programmable logic device. The incoming and outgoing data paths of the variable-width interfaces have separate clocks signals that are synchronized such that small amounts of skew in these clock signals do not disrupt the operation of the variable-width interfaces.

    摘要翻译： 传输可变宽度接口可编程为将1N，2N，4N或8N位宽的电子数字数据路径转换为2N位宽的数据通道，通过将位（4N或8N位） 情况），重新计时位（2N位情况）或分组位（1N位情况）。 接收可变宽度接口可以被编程为将2N位宽的数据路径转换成1N，2N，4N或8N位宽的数据路径。 两个可变宽度数据路径的宽度被独立地控制。 可变宽度接口耦合在可编程逻辑器件的千兆位收发器和核心逻辑之间。 可变宽度接口的输入和输出数据路径具有同步的分离时钟信号，使得这些时钟信号中的少量偏移不会中断可变宽度接口的操作。

    BICMOS repeater circuit for a programmable logic device
    35.
    发明授权
    BICMOS repeater circuit for a programmable logic device 失效
    用于可编程逻辑器件的BICMOS中继器电路

    公开(公告)号：US5497108A

    公开(公告)日：1996-03-05

    申请号：US352402

    申请日：1994-12-08

    申请人： Suresh M. Menon ,  Stanley Wilson ,  Tsung C. Whang

    发明人： Suresh M. Menon ,  Stanley Wilson ,  Tsung C. Whang

    IPC分类号： H03K17/567 ,  H03K19/173 ,  H03K19/0175

    CPC分类号： H03K17/567 ,  H03K19/1736

    摘要： A programmable logic device includes a plurality of logic cells in which logic functions are performed, a plurality of input lines for supplying signals to be processed by the logic cells, a plurality of output lines for receiving signals that have been processed by the logic cells, and a plurality of repeater circuits combining bipolar and CMOS transistor technologies for transferring data from one point in the PLD to another point. Unidirectional repeater circuits transfer data from a first data bus in the PLD to a second data bus in the PLD. Bidirectional repeater circuits maintain signal integrity by transferring data along the length of a single PLD data bus. The bipolar technology in the repeater circuits provides superior speed in data transfer, while the CMOS technology limits power consumption of the repeater circuits.

    摘要翻译： 可编程逻辑器件包括执行逻辑功能的多个逻辑单元，用于提供由逻辑单元处理的信号的多条输入线，用于接收由逻辑单元处理的信号的多条输出线， 以及组合用于将数据从PLD中的一个点传送到另一个点的双极和CMOS晶体管技术的多个中继器电路。 单向中继器电路将数据从PLD中的第一数据总线传送到PLD中的第二数据总线。 双向中继器电路通过沿单个PLD数据总线的长度传输数据来保持信号完整性。 中继器电路中的双极技术在数据传输方面提供卓越的速度，而CMOS技术限制了中继器电路的功耗。

    Bandgap voltage reference circuit with an npn current bypass circuit
    36.
    发明授权
    Bandgap voltage reference circuit with an npn current bypass circuit 失效
    带隙电压参考电路，带npn电流旁路电路

    公开(公告)号：US4795918A

    公开(公告)日：1989-01-03

    申请号：US045950

    申请日：1987-05-01

    申请人： Suresh M. Menon ,  Jay L. Cohan

    发明人： Suresh M. Menon ,  Jay L. Cohan

    IPC分类号： G05F3/30 ,  G05F3/20

    CPC分类号： G05F3/30 ,  Y10S323/907

    摘要： A temperature compensated bandgap voltage reference circuit employs an npn transistor based bypass circuit to maintain a constant collector current within the reference circuit. This bypass circuit draws a nominal current from the bandgap voltage reference circuit. The value of this current is set by a bias circuit responsive to changes in the supply voltage. As the supply voltage changes, the bias circuit varies the conductance of a bypass transistor to draw more or less current and thereby maintain the collector current within the reference circuit constant.