公开(公告)号：US20180041361A1

公开(公告)日：2018-02-08

申请号：US15662535

申请日：2017-07-28

Applicant: DENSO CORPORATION

Inventor： Tomohisa KISHIGAMI ,  Shuichi NAKAMURA

IPC: H04L12/46 ,  H04L25/02 ,  H04J3/22 ,  H03F3/24 ,  H04B3/54

CPC classification number: H04L12/4625 ,  H03F3/24 ,  H04B3/542 ,  H04B3/548 ,  H04B2203/5408 ,  H04B2203/547 ,  H04J3/22 ,  H04L12/40045 ,  H04L25/0272 ,  H04L2012/40215

Abstract: A transmission circuit includes a first transmitter and a second transmitter. The first transmitter turns OFF first transistors when a transmission data is in a high level, and turns ON the first transistors when the transmission data is in a low level. When a permission signal is in the high level, the second transmitter turns ON the second transistors when the transmission data is in the high level, and turns OFF the second transistors when the transmission data is in the low level. Diodes are set to suppress an amplitude of a differential signal in an ON time of the second transistors more than an amplitude of a differential signal in an ON time of the first transistors, to suppress ringing and radiation noise.

公开(公告)号：US20180041358A1

公开(公告)日：2018-02-08

申请号：US15498861

申请日：2017-04-27

Applicant: DENSO CORPORATION

Inventor： Tomohisa KISHIGAMI ,  Shuichi NAKAMURA

IPC: H04L12/40 ,  H04B1/40 ,  H04L1/24

CPC classification number: H04L12/40 ,  H04B1/40 ,  H04L1/248 ,  H04L12/40045 ,  H04L43/0823 ,  H04L2012/40215

Abstract: In a communication device, when an enabling signal is at a high level and a transmit data is at a high level, that is, in a recessive period, both transistors turn off and both transistors turn off. Thus, potentials of signal lines are determined by power supply from a second transmitting part to a communications network. When an error frame arises in this state, that is, transistors in the other ECU turn on, excessive currents flow the signal lines. When current monitoring circuits detect error currents, an error signal is changed to a high level.