公开(公告)号：US11657856B2

公开(公告)日：2023-05-23

申请号：US17113346

申请日：2020-12-07

Applicant: Advanced Micro Devices, Inc.

Inventor： Milam Paraschou ,  Jeffrey Cooper

IPC: G11C7/00 ,  G11C7/06 ,  G11C15/04

CPC classification number: G11C7/065 ,  G11C15/04 ,  G11C2207/063

Abstract: Systems, apparatuses, and methods for implementing a sampling circuit with increased headroom are disclosed. A sampling circuit includes at least a pair of input signal transistors connected via their drains to a cross-coupled pair of state nodes. The cross-coupled pair of state nodes are coupled to a tail transistor device via the sources of N-type transistors. When clock goes low, the circuit precharges the cross-coupled pair of state nodes while simultaneously attempting to amplify the difference between the pair of input signals. The amplification is performed by a pair of transistors in series between a source of each input signal transistor and ground. Each gate of the pair of transistors is connected to an inverted clock signal. When clock goes high, the circuit stops precharging and a voltage difference between the pair of input signals is regenerated to create a resulting differential voltage on the pair of state nodes.

公开(公告)号：US20210111861A1

公开(公告)日：2021-04-15

申请号：US17128720

申请日：2020-12-21

Applicant: Advanced Micro Devices, Inc. ,  ATI Technologies ULC

Inventor： Varun Gupta ,  Milam Paraschou ,  Gerald R. Talbot ,  Gurunath Dollin ,  Damon Tohidi ,  Eric Ian Carpenter ,  Chad S. Gallun ,  Jeffrey Cooper ,  Hanwoo Cho ,  Thomas H. Likens, III ,  Scott F. Dow ,  Michael J. Tresidder

IPC: H04L7/04 ,  H04L7/00

Abstract: Systems, apparatuses, and methods for implementing a deskewing method for a physical layer interface on a multi-chip module are disclosed. A circuit connected to a plurality of communication lanes trains each lane to synchronize a local clock of the lane with a corresponding global clock at a beginning of a timing window. Next, the circuit symbol rotates each lane by a single step responsive to determining that all of the plurality of lanes have an incorrect symbol alignment. Responsive to determining that some but not all of the plurality of lanes have a correct symbol alignment, the circuit symbol rotates lanes which have an incorrect symbol alignment by a single step. When the end of the timing window has been reached, the circuit symbol rotates lanes which have a correct symbol alignment and adjusts a phase of a corresponding global clock to compensate for missed symbol rotations.

公开(公告)号：US10581587B1

公开(公告)日：2020-03-03

申请号：US16397848

申请日：2019-04-29

Applicant: Advanced Micro Devices, Inc. ,  ATI Technologies ULC

Inventor： Varun Gupta ,  Milam Paraschou ,  Gerald R. Talbot ,  Gurunath Dollin ,  Damon Tohidi ,  Eric Ian Carpenter ,  Chad S. Gallun ,  Jeffrey Cooper ,  Hanwoo Cho ,  Thomas H. Likens, III ,  Scott F. Dow ,  Michael J. Tresidder

IPC: H04B17/00 ,  H04L7/04 ,  H04L7/00

Abstract: Systems, apparatuses, and methods for implementing a deskewing method for a physical layer interface on a multi-chip module are disclosed. A circuit connected to a plurality of communication lanes trains each lane to synchronize a local clock of the lane with a corresponding global clock at a beginning of a timing window. Next, the circuit symbol rotates each lane by a single step responsive to determining that all of the plurality of lanes have an incorrect symbol alignment. Responsive to determining that some but not all of the plurality of lanes have a correct symbol alignment, the circuit symbol rotates lanes which have an incorrect symbol alignment by a single step. When the end of the timing window has been reached, the circuit symbol rotates lanes which have a correct symbol alignment and adjusts a phase of a corresponding global clock to compensate for missed symbol rotations.

公开(公告)号：US20210090615A1

公开(公告)日：2021-03-25

申请号：US17113346

申请日：2020-12-07

Applicant: Advanced Micro Devices, Inc.

Inventor： Milam Paraschou ,  Jeffrey Cooper

IPC: G11C7/06 ,  G11C15/04

Abstract: Systems, apparatuses, and methods for implementing a sampling circuit with increased headroom are disclosed. A sampling circuit includes at least a pair of input signal transistors connected via their drains to a cross-coupled pair of state nodes. The cross-coupled pair of state nodes are coupled to a tail transistor device via the sources of N-type transistors. When clock goes low, the circuit precharges the cross-coupled pair of state nodes while simultaneously attempting to amplify the difference between the pair of input signals. The amplification is performed by a pair of transistors in series between a source of each input signal transistor and ground. Each gate of the pair of transistors is connected to an inverted clock signal. When clock goes high, the circuit stops precharging and a voltage difference between the pair of input signals is regenerated to create a resulting differential voltage on the pair of state nodes.

公开(公告)号：US10861507B2

公开(公告)日：2020-12-08

申请号：US16368311

申请日：2019-03-28

Applicant: Advanced Micro Devices, Inc.

Inventor： Milam Paraschou ,  Jeffrey Cooper

IPC: G11C7/06 ,  G11C15/04

Abstract: Systems, apparatuses, and methods for implementing a sampling circuit with increased headroom are disclosed. A sampling circuit includes at least a pair of input signal transistors connected via their drains to a cross-coupled pair of state nodes. The cross-coupled pair of state nodes are coupled to a tail transistor device via the sources of N-type transistors. When clock goes low, the circuit precharges the cross-coupled pair of state nodes while simultaneously attempting to amplify the difference between the pair of input signals. The amplification is performed by a pair of transistors in series between a source of each input signal transistor and ground. Each gate of the pair of transistors is connected to an inverted clock signal. When clock goes high, the circuit stops precharging and a voltage difference between the pair of input signals is regenerated to create a resulting differential voltage on the pair of state nodes.

公开(公告)号：US20200344039A1

公开(公告)日：2020-10-29

申请号：US16709472

申请日：2019-12-10

Applicant: Advanced Micro Devices, Inc. ,  ATI Technologies ULC

Inventor： Varun Gupta ,  Milam Paraschou ,  Gerald R. Talbot ,  Gurunath Dollin ,  Damon Tohidi ,  Eric Ian Carpenter ,  Chad S. Gallun ,  Jeffrey Cooper ,  Hanwoo Cho ,  Thomas H. Likens, III ,  Scott F. Dow ,  Michael J. Tresidder

IPC: H04L7/04 ,  H04L7/00

Abstract: Systems, apparatuses, and methods for implementing a deskewing method for a physical layer interface on a multi-chip module are disclosed. A circuit connected to a plurality of communication lanes trains each lane to synchronize a local clock of the lane with a corresponding global clock at a beginning of a timing window. Next, the circuit symbol rotates each lane by a single step responsive to determining that all of the plurality of lanes have an incorrect symbol alignment. Responsive to determining that some but not all of the plurality of lanes have a correct symbol alignment, the circuit symbol rotates lanes which have an incorrect symbol alignment by a single step. When the end of the timing window has been reached, the circuit symbol rotates lanes which have a correct symbol alignment and adjusts a phase of a corresponding global clock to compensate for missed symbol rotations.