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    • 7. 发明授权
    • FPGA with a plurality of input reference voltage levels grouped into sets
    • FPGA具有多个输入参考电压电平分组成组
    • US06204691B1
    • 2001-03-20
    • US09569745
    • 2000-05-11
    • F. Erich GoettingScott O. FrakeVenu M. KondapalliSteven P. Young
    • F. Erich GoettingScott O. FrakeVenu M. KondapalliSteven P. Young
    • H03K19094
    • H03K19/17744H03K19/00361H03K19/1778H03K19/17788
    • The invention comprises an FPGA having a plurality of input reference voltages and/or output voltage supplies. In one embodiment, two or more differential amplifiers in the same configurable input buffer use different input reference voltages. According to a second aspect of the invention, the I/O pad line is configurably connected to the input reference voltage line, so that any configurable Input/Output Block (IOB) can be used to supply the input reference voltage. According to a third aspect of the invention, the reference input of an I/O is configurably connected to any of two or more input reference voltage lines. According to another aspect of the invention, a single input reference voltage and/or a single output voltage supply is applied to each IOB, with the IOBs grouped into sets. Each set of IOBs has a separate input reference voltage and/or a separate output voltage supply.
    • 本发明包括具有多个输入参考电压和/或输出电压源的FPGA。 在一个实施例中,同一可配置输入缓冲器中的两个或多个差分放大器使用不同的输入参考电压。 根据本发明的第二方面,I / O焊盘线可配置地连接到输入参考电压线,使得可以使用任何可配置的输入/输出块(IOB)来提供输入参考电压。 根据本发明的第三方面,I / O的参考输入可配置地连接到两个或更多个输入参考电压线中的任一个。 根据本发明的另一方面,将单个输入参考电压和/或单个输出电压电源应用于每个IOB,其中IOB被分组成组。 每组IOB具有单独的输入参考电压和/或单独的输出电压电源。
    • 8. 发明授权
    • Digital phase shifter
    • 数字移相器
    • US06775342B1
    • 2004-08-10
    • US09684540
    • 2000-10-06
    • Steven P. YoungJohn D. LogueAndrew K. PerceyF. Erich GoettingAlvin Y. Ching
    • Steven P. YoungJohn D. LogueAndrew K. PerceyF. Erich GoettingAlvin Y. Ching
    • H04L2500
    • H03L7/0814G06F1/10H03L7/07
    • After a delay lock loop synchronizes a reference clock signal with a skewed clock signal, a digital phase shifter can be used to shift the skewed clock signal by a small amount with respect to the reference clock signal. The tap/trim settings of a delay line in the main path of the delay lock loop can be transmitted to the digital phase shifter, thereby informing the digital phase shifter of the period of the reference clock signal. In response, the digital phase shifter provides a phase control signal that introduces a delay, which is referenced to the period of the reference clock signal, to either the reference clock signal or the skew clock signal. The phase control signal is proportional to a predetermined fraction of the period of the reference clock signal. The digital phase shifter can be controlled to operate in several modes. In a first fixed mode, the digital phase shifter introduces delay to the skew clock signal. In a second fixed mode, the digital phase shifter introduces delay to the reference clock signal. In a first variable mode, the digital phase shifter can cause the reference clock signal to lead or lag the skew clock signal by controlling the delay of the reference clock signal. In a second variable mode, the digital phase shifter can cause the reference clock signal to lead or lag the skew clock signal by controlling the delay of the skew clock signal.
    • 在延迟锁定环路使参考时钟信号与偏斜时钟信号同步之后,数字移相器可用于相对于参考时钟信号将偏斜的时钟信号移位一小段量。 在延迟锁定环路的主路径上的延迟线的抽头/微调设置可被发送到数字移相器,由此通知数字移相器参考时钟信号的周期。 作为响应,数字移相器提供相位控制信号,其将参考时钟信号的周期的延迟引入参考时钟信号或偏斜时钟信号。 相位控制信号与参考时钟信号的周期的预定分数成比例。 数字移相器可以控制在多种模式下工作。 在第一固定模式中,数字移相器将延迟引入到偏斜时钟信号。 在第二固定模式中,数字移相器将延迟引入参考时钟信号。 在第一可变模式中,数字移相器可以通过控制参考时钟信号的延迟来引起参考时钟信号引导或延迟偏斜时钟信号。 在第二可变模式中,数字移相器可以通过控制偏斜时钟信号的延迟来引起参考时钟信号引导或延迟偏斜时钟信号。
    • 9. 发明授权
    • FPGA with a plurality of input reference voltage levels
    • FPGA具有多个输入参考电压电平
    • US06448809B2
    • 2002-09-10
    • US09924356
    • 2001-08-07
    • F. Erich GoettingScott O. FrakeVenu M. KondapalliSteven P. Young
    • F. Erich GoettingScott O. FrakeVenu M. KondapalliSteven P. Young
    • G06F738
    • H03K19/17744H03K19/00361H03K19/1778H03K19/17788
    • The invention comprises an FPGA having a plurality of input reference voltages and/or output voltage supplies. In one embodiment, two or more differential amplifiers in the same configurable input buffer use different input reference voltages. According to a second aspect of the invention, the I/O pad line is configurably connected to the input reference voltage line, so that any configurable Input/Output Block (IOB) can be used to supply the input reference voltage. According to a third aspect of the invention, the reference input of an I/O is configurably connected to any of two or more input reference voltage lines. According to another aspect of the invention, a single input reference voltage and/or a single output voltage supply is applied to each IOB, with the IOBs grouped into sets. Each set of IOBs has a separate input reference voltage and/or a separate output voltage supply.
    • 本发明包括具有多个输入参考电压和/或输出电压源的FPGA。 在一个实施例中,同一可配置输入缓冲器中的两个或多个差分放大器使用不同的输入参考电压。 根据本发明的第二方面,I / O焊盘线可配置地连接到输入参考电压线,使得可以使用任何可配置的输入/输出块(IOB)来提供输入参考电压。 根据本发明的第三方面,I / O的参考输入可配置地连接到两个或更多个输入参考电压线中的任一个。 根据本发明的另一方面,将单个输入参考电压和/或单个输出电压电源应用于每个IOB,其中IOB被分组成组。 每组IOB具有单独的输入参考电压和/或单独的输出电压电源。
    • 10. 发明授权
    • FPGA with a plurality of I/O voltage levels
    • 具有多个I / O电压电平的FPGA
    • US6049227A
    • 2000-04-11
    • US187666
    • 1998-11-05
    • F. Erich GoettingScott O. FrakeVenu M. KondapalliSteven P. Young
    • F. Erich GoettingScott O. FrakeVenu M. KondapalliSteven P. Young
    • G06F7/38H03K19/003H03K19/094H03K19/177H03K19/0175H03K19/082
    • H03K19/17744H03K19/00361H03K19/1778H03K19/17788
    • The invention comprises an FPGA having a plurality of input reference voltages and/or output voltage supplies. In one embodiment, two or more differential amplifiers in the same configurable input buffer use different input reference voltages. According to a second aspect of the invention, the I/O pad line is configurably connected to the input reference voltage line, so that any configurable Input/Output Block (IOB) can be used to supply the input reference voltage. According to a third aspect of the invention, the reference input of an I/O is configurably connected to any of two or more input reference voltage lines. According to another aspect of the invention, a single input reference voltage and/or a single output voltage supply is applied to each IOB, with the IOBs grouped into sets. Each set of IOBs has a separate input reference voltage and/or a separate output voltage supply.
    • 本发明包括具有多个输入参考电压和/或输出电压源的FPGA。 在一个实施例中,同一可配置输入缓冲器中的两个或多个差分放大器使用不同的输入参考电压。 根据本发明的第二方面,I / O焊盘线可配置地连接到输入参考电压线,使得可以使用任何可配置的输入/输出块(IOB)来提供输入参考电压。 根据本发明的第三方面,I / O的参考输入可配置地连接到两个或更多个输入参考电压线中的任一个。 根据本发明的另一方面,将单个输入参考电压和/或单个输出电压电源应用于每个IOB,其中IOB被分组成组。 每组IOB具有单独的输入参考电压和/或单独的输出电压电源。