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    • 1. 发明授权
    • Write-leveling implementation in programmable logic devices
    • 在可编程逻辑器件中编写调平实现
    • US08671303B2
    • 2014-03-11
    • US13349228
    • 2012-01-12
    • Yan ChongBonnie I. WangChiakang SungJoseph HuangMichael H. M. Chu
    • Yan ChongBonnie I. WangChiakang SungJoseph HuangMichael H. M. Chu
    • G11C8/00
    • G11C7/22G11C7/1066G11C7/222
    • Circuits, methods, and apparatus for memory interfaces that compensate for skew between a clock signal and DQ/DQS signals that may be caused by a fly-by routing topology. The skew is compensated by clocking the DQ/DQS signals with a phase delayed clock signal, where the phase delay has been calibrated. In one example calibration routine, a clock signal is provided to a receiving device. A DQ/DQS signal is also provided and the timing of their reception compared. A delay of the DQ/DQS signal is changed incrementally until the DQ/DQS signal is aligned with the clock signal at the receiving device. This delay is then used during device operation to delay a signal that clocks registers providing the DQ/DQS signals. Each DQ/DQS group can be aligned to the clock, or the DQS and DQ signals in a group may be independently aligned to the clock at the receiving device.
    • 用于存储器接口的电路,方法和装置,其补偿可能由飞越路由拓扑引起的时钟信号和DQ / DQS信号之间的偏差。 通过使用相位延迟时钟信号对DQ / DQS信号进行时钟补偿,其中相位延迟已校准。 在一个示例性校准例程中,向接收设备提供时钟信号。 还提供了DQ / DQS信号,并将其接收的定时进行比较。 DQ / DQS信号的延迟逐渐改变,直到DQ / DQS信号与接收设备的时钟信号对齐。 然后在器件操作期间使用该延迟来延迟提供DQ / DQS信号的寄存器的信号。 每个DQ / DQS组可以与时钟对齐,或者组中的DQS和DQ信号可以独立地对准接收器件上的时钟。
    • 2. 发明授权
    • Write-leveling implementation in programmable logic devices
    • 在可编程逻辑器件中编写调平实现
    • US08122275B2
    • 2012-02-21
    • US11843123
    • 2007-08-22
    • Yan ChongBonnie I. WangChiakang SungJoseph HuangMichael H. M. Chu
    • Yan ChongBonnie I. WangChiakang SungJoseph HuangMichael H. M. Chu
    • G11C8/00
    • G11C7/22G11C7/1066G11C7/222
    • Circuits, methods, and apparatus for memory interfaces that compensate for skew between a clock signal and DQ/DQS signals that may be caused by a fly-by routing topology. The skew is compensated by clocking the DQ/DQS signals with a phase delayed clock signal, where the phase delay has been calibrated. In one example calibration routine, a clock signal is provided to a receiving device. A DQ/DQS signal is also provided and the timing of their reception compared. A delay of the DQ/DQS signal is changed incrementally until the DQ/DQS signal is aligned with the clock signal at the receiving device. This delay is then used during device operation to delay a signal that clocks registers providing the DQ/DQS signals. Each DQ/DQS group can be aligned to the clock, or the DQS and DQ signals in a group may be independently aligned to the clock at the receiving device.
    • 用于存储器接口的电路,方法和装置,其补偿可能由飞越路由拓扑引起的时钟信号和DQ / DQS信号之间的偏差。 通过使用相位延迟时钟信号对DQ / DQS信号进行时钟补偿,其中相位延迟已校准。 在一个示例性校准例程中,向接收设备提供时钟信号。 还提供了DQ / DQS信号,并将其接收的定时进行比较。 DQ / DQS信号的延迟逐渐改变,直到DQ / DQS信号与接收设备的时钟信号对齐。 然后在器件操作期间使用该延迟来延迟提供DQ / DQS信号的寄存器的信号。 每个DQ / DQS组可以与时钟对齐,或者组中的DQS和DQ信号可以独立地对准接收器件上的时钟。
    • 3. 发明授权
    • DQS postamble filtering
    • DQS后同步码过滤
    • US07324405B1
    • 2008-01-29
    • US11368369
    • 2006-03-03
    • Sanjay K. CharagullaChiakang SungJoseph HuangBonnie I. WangYan Chong
    • Sanjay K. CharagullaChiakang SungJoseph HuangBonnie I. WangYan Chong
    • G11C8/00
    • H03K5/135G11C7/1051G11C7/1066G11C7/1078G11C7/1093G11C7/22H03M9/00
    • Circuits, methods, and apparatus for filtering signals at a high-speed data interface. One exemplary embodiment is particularly configured to filter a clock signal at the end of a data burst received by a double-data rate memory interface. A clock input port is either connected or disconnected to an input cell. When a data burst is to be received, the clock input port is connected to the input cell. When the data burst concludes, the clock input port is disconnected from the input cell. In a specific embodiment, a signal is received indicating that a data burst is about to begin and the clock input port is connected to the input cell. The signal later changes state indicating that the last data bit is being received. When the last clock edge corresponding to the last data bit is received, the clock input port is disconnected from the input cell.
    • 用于在高速数据接口处过滤信号的电路,方法和装置。 一个示例性实施例被特别地配置为在由双数据速率存储器接口接收的数据突发结束时对时钟信号进行滤波。 时钟输入端口与输入单元连接或断开。 当接收到数据脉冲串时,时钟输入端口连接到输入单元。 当数据突发结束时,时钟输入端口与输入单元断开连接。 在具体实施例中,接收到指示数据脉冲串即将开始并且时钟输入端口连接到输入单元的信号。 该信号随后改变指示正在接收最后一个数据位的状态。 当接收到与最后一个数据位相对应的最后一个时钟沿时,时钟输入端口与输入单元断开。
    • 6. 发明申请
    • WRITE-LEVELING IMPLEMENTATION IN PROGRAMMABLE LOGIC DEVICES
    • 可编程逻辑器件中的写层次实现
    • US20080201597A1
    • 2008-08-21
    • US11843123
    • 2007-08-22
    • Yan ChongBonnie I. WangChiakang SungJoseph HuangMichael H.M. Chu
    • Yan ChongBonnie I. WangChiakang SungJoseph HuangMichael H.M. Chu
    • G06F1/12H04L7/00
    • G11C7/22G11C7/1066G11C7/222
    • Circuits, methods, and apparatus for memory interfaces that compensate for skew between a clock signal and DQ/DQS signals that may be caused by a fly-by routing topology. The skew is compensated by clocking the DQ/DQS signals with a phase delayed clock signal, where the phase delay has been calibrated. In one example calibration routine, a clock signal is provided to a receiving device. A DQ/DQS signal is also provided and the timing of their reception compared. A delay of the DQ/DQS signal is changed incrementally until the DQ/DQS signal is aligned with the clock signal at the receiving device. This delay is then used during device operation to delay a signal that clocks registers providing the DQ/DQS signals. Each DQ/DQS group can be aligned to the clock, or the DQS and DQ signals in a group may be independently aligned to the clock at the receiving device.
    • 用于存储器接口的电路,方法和装置,其补偿可能由飞越路由拓扑引起的时钟信号和DQ / DQS信号之间的偏差。 通过使用相位延迟时钟信号对DQ / DQS信号进行时钟补偿,其中相位延迟已校准。 在一个示例性校准例程中,向接收设备提供时钟信号。 还提供了DQ / DQS信号,并将其接收的定时进行比较。 DQ / DQS信号的延迟逐渐改变,直到DQ / DQS信号与接收设备的时钟信号对齐。 然后在器件操作期间使用该延迟来延迟提供DQ / DQS信号的寄存器的信号。 每个DQ / DQS组可以与时钟对齐,或者组中的DQS和DQ信号可以独立地对准接收器件上的时钟。