公开(公告)号：US06191608B1

公开(公告)日：2001-02-20

申请号：US08851250

申请日：1997-05-05

申请人： Richard G. Cliff ,  Srinivas T. Reddy ,  Kerry Veenstra ,  Andreas Papaliolios ,  Chiakang Sung ,  Richard Shaw Terrill ,  Rina Raman ,  Robert Richard Noel Bielby

发明人： Richard G. Cliff ,  Srinivas T. Reddy ,  Kerry Veenstra ,  Andreas Papaliolios ,  Chiakang Sung ,  Richard Shaw Terrill ,  Rina Raman ,  Robert Richard Noel Bielby

IPC分类号： H03K19177

CPC分类号： H03K19/17776 ,  G06F17/5054 ,  H03K19/1774 ,  H03K19/17748

摘要： Programmable logic array devices are programmed from programming devices in networks that facilitate programming any number of such logic devices with programs of any size or complexity. The source of programming data and control may be a microprocessor or one or more serial EPROMs, one EPROM being equipped with a clock circuit. Several parallel data streams may be used to speed up the programming operation. A clock circuit with a programmably variable speed may be provided to facilitate programming logic devices with different speed characteristics. The programming protocol may include an acknowledgment from the logic device(s) to the programming data source after each programming data transmission so that the source can automatically transmit programming data at the speed at which the logic device is able to accept that data.

摘要翻译： 可编程逻辑阵列器件由网络中的编程设备编程，这些器件可以利用任何大小或复杂度的程序来编程任何数量的这种逻辑器件。 编程数据和控制的源可以是微处理器或一个或多个串行EPROM，一个EPROM配备有时钟电路。 可以使用几个并行数据流来加速编程操作。 可以提供具有可编程可变速度的时钟电路以便于具有不同速度特性的编程逻辑器件。 编程协议可以包括在每个编程数据传输之后从逻辑设备到编程数据源的确认，使得源可以以逻辑设备能够接受该数据的速度自动发送编程数据。

公开(公告)号：US06469553B1

公开(公告)日：2002-10-22

申请号：US09811946

申请日：2001-03-19

申请人： Chiakang Sung ,  Robert R. N. Bielby ,  Richard G. Cliff ,  Edward Aung

发明人： Chiakang Sung ,  Robert R. N. Bielby ,  Richard G. Cliff ,  Edward Aung

IPC分类号： H03L700

CPC分类号： H03K19/1774 ,  G06F1/04 ,  G06F1/08 ,  H03K19/17732 ,  H03L7/0891 ,  H03L7/23

摘要： A programmable logic device is provided with phase-locked loop (“PLL”) circuitry that includes two serially connected PLL circuits. An input clock signal is processed by a first of the PLL circuits to produce an intermediate clock signal having a frequency different from the input clock signal frequency. The intermediate clock signal is processed by the second PLL circuit to produce a final modified clock signal having a frequency different from both the input clock signal frequency and the intermediate clock signal frequency. By providing two serially connected PLL circuits, each PLL circuit can be required to operate with frequencies in a narrower range than might otherwise be required in a single PLL circuit required to produce a given input-to-final frequency change. Other circuitry on the programmable logic device (e.g., input/output registers and programmable logic circuitry for processing data signals) is responsive to the input and final modified clock signals. The two PLL circuits may alternatively be used separately or partly separately.

摘要翻译： 可编程逻辑器件提供有锁相环（“PLL”）电路，其包括两个串联的PLL电路。 输入时钟信号由第一PLL电路处理以产生具有与输入时钟信号频率不同的频率的中间时钟信号。 中间时钟信号由第二PLL电路处理以产生具有与输入时钟信号频率和中间时钟信号频率两者不同的频率的最终修改的时钟信号。 通过提供两个串联连接的PLL电路，可以要求每个PLL电路以比在产生给定的输入到最终频率变化所需的单个PLL电路中可能需要的更窄的范围内工作。 可编程逻辑器件上的其他电路（例如，用于处理数据信号的输入/输出寄存器和可编程逻辑电路）响应于输入和最终修改的时钟信号。 两个PLL电路可以单独使用或部分单独使用。

公开(公告)号：US06218876B1

公开(公告)日：2001-04-17

申请号：US09392095

申请日：1999-09-08

申请人： Chiakang Sung ,  Robert R. N. Bielby ,  Richard G. Cliff ,  Edward Aung

发明人： Chiakang Sung ,  Robert R. N. Bielby ,  Richard G. Cliff ,  Edward Aung

IPC分类号： H03L706

CPC分类号： H03K19/1774 ,  G06F1/04 ,  G06F1/08 ,  H03K19/17732 ,  H03L7/0891 ,  H03L7/23

摘要： A programmable logic device is provided with phase-locked loop (“PLL”) circuitry that includes two serially connected PLL circuits. An input clock signal is processed by a first of the PLL circuits to produce an intermediate clock signal having a frequency different from the input clock signal frequency. The intermediate clock signal is processed by the second PLL circuit to produce a final modified clock signal having a frequency different from both the input clock signal frequency and the intermediate clock signal frequency. By providing two serially connected PLL circuits, each PLL circuit can be required to operate with frequencies in a narrower range than might otherwise be required in a single PLL circuit required to produce a given input-to-final frequency change. Other circuitry on the programmable logic device (e.g., input/output registers and programmable logic circuitry for processing data signals) is responsive to the input and final modified clock signals. The two PLL circuits may alternatively be used separately or partly separately.

摘要翻译： 可编程逻辑器件提供有锁相环（“PLL”）电路，其包括两个串联的PLL电路。 输入时钟信号由第一PLL电路处理以产生具有与输入时钟信号频率不同的频率的中间时钟信号。 中间时钟信号由第二PLL电路处理以产生具有与输入时钟信号频率和中间时钟信号频率两者不同的频率的最终修改的时钟信号。 通过提供两个串联连接的PLL电路，可以要求每个PLL电路以比在产生给定的输入到最终频率变化所需的单个PLL电路中可能需要的更窄的范围内工作。 可编程逻辑器件上的其他电路（例如，用于处理数据信号的输入/输出寄存器和可编程逻辑电路）响应于输入和最终修改的时钟信号。 两个PLL电路可以单独使用或部分单独使用。

公开(公告)号：US06384630B2

公开(公告)日：2002-05-07

申请号：US09760231

申请日：2001-01-12

申请人： Richard G. Cliff ,  Srinivas T. Reddy ,  Kerry Veenstra ,  Andreas Papaliolios ,  Chiakang Sung ,  Richard Shaw Terrill ,  Rina Raman ,  Robert Richard Noel Bielby

发明人： Richard G. Cliff ,  Srinivas T. Reddy ,  Kerry Veenstra ,  Andreas Papaliolios ,  Chiakang Sung ,  Richard Shaw Terrill ,  Rina Raman ,  Robert Richard Noel Bielby

IPC分类号： H03K19177

CPC分类号： H03K19/17776 ,  G06F17/5054 ,  H03K19/1774 ,  H03K19/17744 ,  H03K19/17748

摘要： Programmable logic array devices are programmed from programming devices in networks that facilitate programming any number of such logic devices with programs of any size or complexity. The source of programming data and control may be a microprocessor or one or more serial EPROMs, one EPROM being equipped with a clock circuit. Several parallel data streams may be used to speed up the programming operation. A clock circuit with a programmably variable speed may be provided to facilitate programming logic devices with different speed characteristics. The programming protocol may include an acknowledgment from the logic device(s) to the programming data source after each programming data transmission so that the source can automatically transmit programming data at the speed at which the logic device is able to accept that data.

摘要翻译： 可编程逻辑阵列器件由网络中的编程设备编程，这些器件可以利用任何大小或复杂度的程序来编程任何数量的这种逻辑器件。 编程数据和控制的源可以是微处理器或一个或多个串行EPROM，一个EPROM配备有时钟电路。 可以使用几个并行数据流来加速编程操作。 可以提供具有可编程可变速度的时钟电路以便于具有不同速度特性的编程逻辑器件。 编程协议可以包括在每个编程数据传输之后从逻辑设备到编程数据源的确认，使得源可以以逻辑设备能够接受该数据的速度自动发送编程数据。

公开(公告)号：US5543730A

公开(公告)日：1996-08-06

申请号：US442801

申请日：1995-05-17

申请人： Richard G. Cliff ,  Srinivas T. Reddy ,  Kerry Veenstra ,  Andreas Papaliolios ,  Chiakang Sung ,  Richard S. Terrill ,  Rina Raman ,  Robert R. N. Bielby

发明人： Richard G. Cliff ,  Srinivas T. Reddy ,  Kerry Veenstra ,  Andreas Papaliolios ,  Chiakang Sung ,  Richard S. Terrill ,  Rina Raman ,  Robert R. N. Bielby

IPC分类号： G06F17/50 ,  H03K19/177

CPC分类号： H03K19/17776 ,  G06F17/5054 ,  H03K19/1774 ,  H03K19/17748

摘要： Programmable logic array devices are programmed from programming devices in networks that facilitate programming any number of such logic devices with programs of any size or complexity. The source of programming data and control may be a microprocessor or one or more serial EPROMs, one EPROM being equipped with a clock circuit. Several parallel data streams may be used to speed up the programming operation. A clock circuit with a programmably variable speed may be provided to facilitate programming logic devices with different speed characteristics. The programming protocol may include an acknowledgement from the logic device(s) to the programming data source after each programming data transmission so that the source can automatically transmit programming data at the speed at which the logic device is able to accept that data.

摘要翻译： 可编程逻辑阵列器件由网络中的编程设备编程，这些器件可以利用任何大小或复杂度的程序来编程任何数量的这种逻辑器件。 编程数据和控制的源可以是微处理器或一个或多个串行EPROM，一个EPROM配备有时钟电路。 可以使用几个并行数据流来加速编程操作。 可以提供具有可编程可变速度的时钟电路以便于具有不同速度特性的编程逻辑器件。 编程协议可以包括在每个编程数据传输之后从逻辑设备到编程数据源的确认，使得源可以以逻辑设备能够接受该数据的速度自动发送编程数据。

公开(公告)号：US08593195B1

公开(公告)日：2013-11-26

申请号：US13614526

申请日：2012-09-13

申请人： Joseph Huang ,  Chiakang Sung ,  Philip Pan ,  Yan Chong ,  Andy L. Lee ,  Brian D. Johnson

发明人： Joseph Huang ,  Chiakang Sung ,  Philip Pan ,  Yan Chong ,  Andy L. Lee ,  Brian D. Johnson

IPC分类号： H03H11/16

CPC分类号： H03L7/0812 ,  G11C7/22 ,  G11C7/222 ,  H03L7/0805

摘要： A programmable memory interface circuit includes a programmable DLL delay chain, a phase offset control circuit and a programmable DQS delay chain. The DLL delay chain uses a set of serially connected delay cells, a programmable switch, a phase detector and a digital counter to generate a coarse phase shift control setting. The coarse phase shift control setting is then used to pre-compute a static residual phase shift control setting or generate a dynamic residual phase shift control setting, one of which is chosen by the phase offset control circuit to be added to or subtracted from the coarse phase shift control setting to generate a fine phase shift control setting. The coarse and fine phase shift control settings work in concert to generate a phase-delayed DQS signal that is center-aligned to its associated DQ signals.

摘要翻译： 可编程存储器接口电路包括可编程DLL延迟链，相位偏移控制电路和可编程DQS延迟链。 DLL延迟链使用一组串行连接的延迟单元，可编程开关，相位检测器和数字计数器来产生粗略的相移控制设置。 然后，粗略的相移控制设置用于预先计算静态残留相移控制设置或生成动态残留相移控制设置，其中一个由相位偏移控制电路选择以被加到或从粗略 相移控制设置，以产生精细的相移控制设置。 粗调和精细相移控制设置一致地产生相位延迟的DQS信号，其中心对准其相关联的DQ信号。

公开(公告)号：US08237475B1

公开(公告)日：2012-08-07

申请号：US12248031

申请日：2008-10-08

申请人： Pradeep Nagarajan ,  Sean Shau-Tu Lu ,  Chiakang Sung ,  Joseph Huang ,  Yan Chong

发明人： Pradeep Nagarajan ,  Sean Shau-Tu Lu ,  Chiakang Sung ,  Joseph Huang ,  Yan Chong

IPC分类号： H03L7/06

CPC分类号： H03L7/0805 ,  H03L7/0814 ,  H03L7/0816

摘要： A circuit includes a locked loop and a phase offset circuit. The locked loop generates first control signals for controlling a first delay in the locked loop. The phase offset circuit delays an input signal by a second delay that is controlled by second control signals to generate a delayed signal. The phase offset circuit generates the second control signals by adjusting the first control signals to increase the accuracy of the delayed signal with respect to a target phase. The second control signals compensate for at least a portion of a change in the second delay that is caused by a variation in at least one of a process, a supply voltage, and a temperature of the circuit.

摘要翻译： 电路包括锁定环和相位偏移电路。 锁定环产生用于控制锁定环路中的第一延迟的第一控制信号。 相位偏移电路延迟由第二控制信号控制的第二延迟的输入信号以产生延迟的信号。 相位偏移电路通过调整第一控制信号来产生第二控制信号，以提高相对于目标相位的延迟信号的精度。 第二控制信号补偿由电路的过程，电源电压和温度中的至少一个的变化引起的第二延迟的变化的至少一部分。

公开(公告)号：US08130016B2

公开(公告)日：2012-03-06

申请号：US12642502

申请日：2009-12-18

申请人： Pradeep Nagarajan ,  Yan Chong ,  Chiakang Sung ,  Joseph Huang

发明人： Pradeep Nagarajan ,  Yan Chong ,  Chiakang Sung ,  Joseph Huang

IPC分类号： H03L7/06

CPC分类号： H03L7/0814 ,  H03K5/134 ,  H03K5/1565 ,  H03K2005/00065

摘要： A feedback loop circuit includes a phase detector and delay circuits. The phase detector generates an output signal based on a delayed periodic signal. The delay circuits are coupled in a delay chain that delays the delayed periodic signal. Each of the delay circuits comprises variable delay blocks and fixed delay blocks that are coupled to form at least two delay paths for an input signal through the delay circuit to generate a delayed output signal. Delays of the variable delay blocks in the delay circuits vary based on the output signal of the phase detector. Each of the delay circuits reroutes the input signal through a different one of the delay paths to generate the delayed output signal based on the output signal of the phase detector during operation of the feedback loop circuit. Each of the variable delay blocks and the fixed delay blocks is inverting.

摘要翻译： 反馈回路包括相位检测器和延迟电路。 相位检测器基于延迟周期信号产生输出信号。 延迟电路在延迟链中耦合，延迟链延迟了延迟的周期信号。 每个延迟电路包括可变延迟块和固定延迟块，其被耦合以形成用于通过延迟电路的输入信号的至少两个延迟路径以产生延迟的输出信号。 延迟电路中的可变延迟块的延迟基于相位检测器的输出信号而变化。 每个延迟电路通过不同的延迟路径重新路由输入信号，以在反馈回路电路的操作期间基于相位检测器的输出信号产生延迟的输出信号。 每个可变延迟块和固定延迟块都是反相的。

公开(公告)号：US20110175657A1

公开(公告)日：2011-07-21

申请号：US12690064

申请日：2010-01-19

申请人： Yan Chong ,  Joseph Huang ,  Pradeep Nagarajan ,  Chiakang Sung

发明人： Yan Chong ,  Joseph Huang ,  Pradeep Nagarajan ,  Chiakang Sung

IPC分类号： H03K3/017

CPC分类号： H03K5/1565 ,  H03K5/151 ,  H03K5/1534 ,  H03K2005/00019

摘要： Circuits and a method for correcting duty cycle distortions in an integrated circuit (IC) are disclosed. The IC includes a splitter circuit that is coupled to receive a clock signal. The clock signal is split into two different clock signals. One of the clock signals is an inverted version of the other. A delay circuit is coupled to each of the clock signals. Each of the delay circuits generates a delayed version of the corresponding clock signal. A corrector circuit is coupled to receive both the delayed versions of the clock signals. The corrector circuit generates a clock output signal with a corrected duty cycle.

摘要翻译： 公开了用于校正集成电路（IC）中的占空比失真的电路和方法。 IC包括被耦合以接收时钟信号的分离器电路。 时钟信号分为两个不同的时钟信号。 其中一个时钟信号是另一个的反转版本。 延迟电路耦合到每个时钟信号。 每个延迟电路产生相应时钟信号的延迟版本。 耦合校正器电路以接收时钟信号的延迟版本。 校正器电路产生具有校正占空比的时钟输出信号。

公开(公告)号：US07710149B1

公开(公告)日：2010-05-04

申请号：US12190530

申请日：2008-08-12

申请人： Jonathan Chung ,  In Whan Kim ,  Philip Pan ,  Chiakang Sung ,  Bonnie Wang ,  Xiabao Wang ,  Yan Chong ,  Gopinath Rangan ,  Khai Nguyen ,  Tzung-Chin Chang ,  Joseph Huang

发明人： Jonathan Chung ,  In Whan Kim ,  Philip Pan ,  Chiakang Sung ,  Bonnie Wang ,  Xiabao Wang ,  Yan Chong ,  Gopinath Rangan ,  Khai Nguyen ,  Tzung-Chin Chang ,  Joseph Huang

IPC分类号： H03K19/094 ,  H03K19/0948

CPC分类号： H03K19/018585

摘要： An input buffer circuit has a plurality of selectively enabled differential amplifier circuits, where each differential amplifier is configured for compatibility with a particular differential I/O standard and its corresponding input operating range. For example, the input buffer may have two differential amplifiers suitable for receiving LVDS differential input signals over a wide input operating range, and another differential amplifier suitable for receiving the PCML differential input signals. One or more control signals are provided to the input buffer, e.g., programmably, to selectively enable the required differential amplifier(s) for a given I/O standard.

摘要翻译： 输入缓冲器电路具有多个选择性启用的差分放大器电路，其中每个差分放大器被配置为与特定差分I / O标准及其对应的输入工作范围兼容。 例如，输入缓冲器可以具有适合于在宽输入工作范围内接收LVDS差分输入信号的两个差分放大器，以及适合于接收PCML差分输入信号的另一差分放大器。 一个或多个控制信号例如可编程地提供给输入缓冲器，以选择性地启用给定的I / O标准所需的差分放大器。