公开(公告)号：US11310072B2

公开(公告)日：2022-04-19

申请号：US17063450

申请日：2020-10-05

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Richard Sterling Broughton ,  Vijayalakshmi Devarajan ,  Wesley Ryan Ray ,  Dushmantha Bandara Rajapaksha

IPC: H04L12/40 ,  H04M3/02

Abstract: A transceiver includes a driver stage and a transient-triggered ring suppression circuit. The driver stage has a first transistor coupled between a supply voltage terminal and a first bus terminal and a second transistor coupled between a ground and a second bus terminal. The transient-triggered ring suppression circuit is coupled to the first and second transistors. The transient-triggered ring suppression circuit is configured to be enabled upon transition of the transceiver from a dominant state to a recessive state. Further, while the transceiver is in the recessive state, the transient-triggered ring suppression circuit is configured to attenuate ringing on at least one of the first or second bus terminals.

公开(公告)号：US10884069B2

公开(公告)日：2021-01-05

申请号：US16101213

申请日：2018-08-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Richard Edwin Hubbard ,  Abhijeeth Aarey Premanath ,  Terry Mayhugh ,  Mark Edward Wentroble ,  Wesley Ryan Ray

IPC: G01R31/02 ,  H04L12/24 ,  G01R19/25 ,  G01R31/50 ,  H04L12/40

Abstract: A CAN bus transceiver includes CAN bus fault detection circuitry that can provide detailed information to simplify the task of the service technician when there is a CAN bus fault. Voltage and current measurements of the CAN bus are made and from them a fault type is determined. A time-domain reflectometer monitors the CAN bus signals for transmitted and reflected signals and from them a distance to the fault is determined. Either or both values are provided to a service technician to allow error determination and correction.