公开(公告)号：US10211939B2

公开(公告)日：2019-02-19

申请号：US14900001

申请日：2014-06-27

Applicant: Napatech A/S

Inventor： Nicolai Asbjørn Smitt

IPC: H04J3/06 ,  H04L7/00 ,  G06F5/06

Abstract: Forwarding points in time of a clock over a clock boundary is performed by launching the points in time into a buffer, such as a FIFO, in the first clock domain. The oldest point in time is fed into a FIFO or delay line in the other clock domain, which FIFO or delay line comprises a plurality of received points in time, which are shifted through the FIFO or delay line over time. An estimate of a point in time in the second clock domain is derived from a plurality of the points in time in the delay line/FIFO, such as from a mean value thereof. This point in time may be compensated for a known delay in order for this determined point in time to be identical to or close to an actual point in time of the first clock in the first clock domain.

公开(公告)号：US20160142167A1

公开(公告)日：2016-05-19

申请号：US14900001

申请日：2014-06-27

Applicant: NAPATECH A/S

Inventor： Nicolai Asbjørn Smitt

IPC: H04J3/06 ,  G06F5/06

CPC classification number: H04J3/06 ,  G06F5/065 ,  G06F2205/067 ,  H04J3/0697 ,  H04L7/005

Abstract: Forwarding points in time of a clock over a clock boundary is performed by launching the points in time into a buffer, such as a FIFO, in the first clock domain. The oldest point in time is fed into a FIFO or delay line in the other clock domain, which FIFO or delay line comprises a plurality of received points in time, which are shifted through the FIFO or delay line over time. An estimate of a point in time in the second clock domain is derived from a plurality of the points in time in the delay line/FIFO, such as from a mean value thereof. This point in time may be compensated for a known delay in order for this determined point in time to be identical to or close to an actual point in time of the first clock in the first clock domain.

Abstract translation: 通过在时钟边界上的时钟上的转发时间点，通过在第一时钟域中将时间点发送到诸如FIFO的缓冲器中来执行。 最早的时间点被馈送到另一个时钟域中的FIFO或延迟线，该FIFO或延迟线包括多个接收的时间点，这些时间点经过FIFO或延迟线被移位。 第二时钟域中的时间点的估计从延迟线/ FIFO中的多个时间点导出，例如从其平均值。 这个时间点可以被补偿已知的延迟，以使该确定的时间点与第一时钟域中的第一时钟的实际时间点相同或接近。