公开(公告)号：US12026521B2

公开(公告)日：2024-07-02

申请号：US17521378

申请日：2021-11-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mark Edward Wentroble ,  Anant Shankar Kamath ,  Rakesh Hariharan ,  Prajwala P ,  Suzanne Mary Vining

IPC: G06F13/00 ,  G06F1/3215 ,  G06F9/4401 ,  G06F13/38 ,  G06F13/42

CPC classification number: G06F9/4411 ,  G06F1/3215 ,  G06F13/382 ,  G06F13/4282 ,  G06F2213/0042

Abstract: A serial bus repeater includes first and second ports adapted to be coupled to respective devices. A first termination resistor network couples to the first port. A second termination resistor network couples to the second port. A squelch detect circuit couples to the first bus port and is configured to detect activity on the first bus and to generate a squelch signal responsive to detection of activity on the first port. A first state machine is configured to: determine an elapsed time during which the squelch signal indicates activity on the first port; determine that the elapsed time exceeds a first threshold; and, responsive to the determination that the elapsed time exceeds the first threshold, assert configuration signals to reconfigure the first and second termination resistor networks.

公开(公告)号：US12216602B2

公开(公告)日：2025-02-04

申请号：US17581202

申请日：2022-01-21

Applicant: Texas Instruments Incorporated

Inventor： Anant Kamath ,  Suzanne M. Vining ,  Rakesh Hariharan ,  Mark Wentroble ,  Christopher Rodrigues ,  Prajwala P

IPC: G06F13/38 ,  G06F13/40

Abstract: An example apparatus includes: a pullup circuit coupled to a first USB terminal; a first pulldown circuit coupled to the first USB terminal; a second pulldown circuit coupled to a second USB terminal; a third pulldown circuit coupled to a third USB terminal; a fourth pulldown circuit coupled to a fourth USB terminal; a high-speed termination detection circuit including: a current source including a first supply terminal and a second supply terminal, the first supply terminal coupled to the first USB terminal, the second supply terminal coupled to the second USB terminal; a first comparator including a first comparator terminal and a second comparator terminal, the first comparator terminal coupled to the first USB terminal; and a second comparator including a third comparator terminal and a fourth comparator terminal, the third comparator terminal coupled to the second USB terminal; and a controller including a first control terminal and a second control terminal, the first control terminal coupled to the second comparator terminal, the second control terminal coupled to the fourth comparator terminal.

公开(公告)号：US20240320013A1

公开(公告)日：2024-09-26

申请号：US18731784

申请日：2024-06-03

Applicant: Texas Instruments Incorporated

Inventor： Mark Edward Wentroble ,  Anant Shankar Kamath ,  Rakesh Hariharan ,  Prajwala P ,  Suzanne Mary Vining

IPC: G06F9/4401 ,  G06F1/3215 ,  G06F13/38 ,  G06F13/42

CPC classification number: G06F9/4411 ,  G06F1/3215 ,  G06F13/382 ,  G06F13/4282 ,  G06F2213/0042

Abstract: A serial bus repeater includes first and second ports adapted to be coupled to respective devices. A first termination resistor network couples to the first port. A second termination resistor network couples to the second port. A squelch detect circuit couples to the first bus port and is configured to detect activity on the first bus and to generate a squelch signal responsive to detection of activity on the first port. A first state machine is configured to: determine an elapsed time during which the squelch signal indicates activity on the first port; determine that the elapsed time exceeds a first threshold; and, responsive to the determination that the elapsed time exceeds the first threshold, assert configuration signals to reconfigure the first and second termination resistor networks.

公开(公告)号：US20230237002A1

公开(公告)日：2023-07-27

申请号：US17581202

申请日：2022-01-21

Applicant: Texas Instruments Incorporated

Inventor： Anant Kamath ,  Suzanne M. Vining ,  Rakesh Hariharan ,  Mark Wentroble ,  Christopher Rodrigues ,  Prajwala P

IPC: G06F13/38 ,  G06F13/40

CPC classification number: G06F13/385 ,  G06F13/4068 ,  G06F2213/0042

Abstract: An example apparatus includes: a pullup circuit coupled to a first USB terminal; a first pulldown circuit coupled to the first USB terminal; a second pulldown circuit coupled to a second USB terminal; a third pulldown circuit coupled to a third USB terminal; a fourth pulldown circuit coupled to a fourth USB terminal; a high-speed termination detection circuit including: a current source including a first supply terminal and a second supply terminal, the first supply terminal coupled to the first USB terminal, the second supply terminal coupled to the second USB terminal; a first comparator including a first comparator terminal and a second comparator terminal, the first comparator terminal coupled to the first USB terminal; and a second comparator including a third comparator terminal and a fourth comparator terminal, the third comparator terminal coupled to the second USB terminal; and a controller including a first control terminal and a second control terminal, the first control terminal coupled to the second comparator terminal, the second control terminal coupled to the fourth comparator terminal.

公开(公告)号：US20220391217A1

公开(公告)日：2022-12-08

申请号：US17521378

申请日：2021-11-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mark Edward WENTROBLE ,  Anant Shankar KAMATH ,  Rakesh HARIHARAN ,  Prajwala P ,  Suzanne Mary VINING

IPC: G06F9/4401 ,  G06F13/42

Abstract: A serial bus repeater includes first and second ports adapted to be coupled to respective devices. A first termination resistor network couples to the first port. A second termination resistor network couples to the second port. A squelch detect circuit couples to the first bus port and is configured to detect activity on the first bus and to generate a squelch signal responsive to detection of activity on the first port. A first state machine is configured to: determine an elapsed time during which the squelch signal indicates activity on the first port; determine that the elapsed time exceeds a first threshold; and, responsive to the determination that the elapsed time exceeds the first threshold, assert configuration signals to reconfigure the first and second termination resistor networks.