公开(公告)号：US11646724B2

公开(公告)日：2023-05-09

申请号：US17668584

申请日：2022-02-10

Applicant: Rambus Inc.

Inventor： Charles Walter Boecker ,  Roxanne Vu ,  Eric Douglas Groen

IPC: H03K5/13 ,  H03K3/356 ,  H03K5/135 ,  H03K5/00

CPC classification number: H03K5/13 ,  H03K3/356104 ,  H03K5/135 ,  H03K2005/00019

Abstract: Disclosed is a system where indicators of the relative phase differences between combinations of clocks in a multi-phase clock system are developed and/or measured. These indicators convey information regarding which phase difference between a given pair of the clocks is greater than (or less than) the phase difference between another pair of the clocks. This information is used to sort/rank/order phase differences between the various combinations of pairs of clocks according to their phase differences. This ranking is used to select the pair of clocks to be adjusted.

公开(公告)号：US11283435B2

公开(公告)日：2022-03-22

申请号：US16721116

申请日：2019-12-19

Applicant: Rambus Inc.

Inventor： Charles Walter Boecker ,  Roxanne Vu ,  Eric Douglas Groen

IPC: H03K5/13 ,  H03K5/135 ,  H03K3/356 ,  H03K5/00

Abstract: Disclosed is a system where indicators of the relative phase differences between combinations of clocks in a multi-phase clock system are developed and/or measured. These indicators convey information regarding which phase difference between a given pair of the clocks is greater than (or less than) the phase difference between another pair of the clocks. This information is used to sort/rank/order phase differences between the various combinations of pairs of clocks according to their phase differences. This ranking is used to select the pair of clocks to be adjusted.

公开(公告)号：US20210305956A1

公开(公告)日：2021-09-30

申请号：US17270223

申请日：2019-07-22

Applicant: Rambus Inc.

Inventor： Eric Douglas Groen ,  Charles Walter Boecker

IPC: H03F3/45 ,  H03F3/26 ,  H04L25/49

Abstract: A current-mode transmitter amplifies a differential input signal to a differential, current-mode output signal. A split-input, current-mode-logic stage produces small, analog signals to limit switching currents and thus power consumption and power-supply noise. These small, analog signals are driven through a source-follower stage to reduce loading and shift the common-mode voltage to a desired level. A switched-current-source H-bridge driver combines differential outputs from the source-follower stage to provide an amplified differential output current. The output swing from the H-bridge driver is controlled by the voltage level from the source follower and derived from a replica-bias structure.