公开(公告)号：US20200049754A1

公开(公告)日：2020-02-13

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

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.

公开(公告)号：US20200264643A1

公开(公告)日：2020-08-20

申请号：US16459107

申请日：2019-07-01

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Deep BANERJEE ,  Lokesh Kumar GUPTA ,  Abhijeeth AAREY PREMANATH ,  Richard Sterling BROUGHTON

IPC: G05F1/56 ,  H04L12/40 ,  H04B1/40

Abstract: A bus transceiver circuit including a current source device, a current mirror coupled to the current source device, and a first transistor having a first control input and first and second current terminals. The bus transceiver circuit also includes a second transistor having a second control input and third and fourth current terminals. The third current terminal is coupled to the first control input at a first node. The fourth current terminal is coupled to the current mirror. A resistor is coupled between the first current terminal and the first node.