公开(公告)号：US09444442B2

公开(公告)日：2016-09-13

申请号：US14165370

申请日：2014-01-27

Applicant: RAMBUS INC.

Inventor： Srinivasaraman Chandrasekaran ,  Gundlapalli Shanmukha Srinivas

IPC: H03K3/017 ,  H03K5/156

CPC classification number: H03K5/1565

Abstract: A Phase Interpolator (PI) may be employed as a precisely-controlled delay element in a transmit path, for example in clock forwarded serial links. Methods and circuits are disclosed for estimating a delay needed to correct duty-cycle/and or phase errors of the received clock. These corrections or delta values may be transmitted back to the transmitter side, preferably expressed directly in terms of PI phase codes, for convenient adjustment in the transmitter clock circuitry. Various techniques also are disclosed for measuring and mitigating the effects on PI integral non-linearity.

Abstract translation: 相位插值器（PI）可以用作发送路径中的精确控制的延迟元件，例如在时钟转发的串行链路中。 公开了用于估计校正所接收时钟的占空比和/或相位误差所需的延迟的方法和电路。 这些校正或增量值可以被发送回发射机侧，优选地以PI相位代码直接表示，以便在发射机时钟电路中进行便利的调整。 公开了用于测量和减轻对PI积分非线性的影响的各种技术。

公开(公告)号：US20140253195A1

公开(公告)日：2014-09-11

申请号：US14165370

申请日：2014-01-27

Applicant: RAMBUS INC.

Inventor： Srinivasaraman Chandrasekaran ,  Gundlapalli Shanmukha Srinivas

IPC: H03K5/156

CPC classification number: H03K5/1565

Abstract: A Phase Interpolator (PI) may be employed as a precisely-controlled delay element in a transmit path, for example in clock forwarded serial links. Methods and circuits are disclosed for estimating a delay needed to correct duty-cycle/and or phase errors of the received clock. These corrections or delta values may be transmitted back to the transmitter side, preferably expressed directly in terms of PI phase codes, for convenient adjustment in the transmitter clock circuitry. Various techniques also are disclosed for measuring and mitigating the effects on PI integral non-linearity.

Abstract translation: 相位插值器（PI）可以用作发送路径中的精确控制的延迟元件，例如在时钟转发的串行链路中。 公开了用于估计校正所接收时钟的占空比和/或相位误差所需的延迟的方法和电路。 这些校正或增量值可以被发送回发射机侧，优选地以PI相位代码直接表示，以便在发射机时钟电路中进行便利的调整。 公开了用于测量和减轻对PI积分非线性的影响的各种技术。