公开(公告)号：US10164620B1

公开(公告)日：2018-12-25

申请号：US15748749

申请日：2016-08-25

Applicant: DENSO CORPORATION ,  SOKEN, INC.

Inventor： Takuya Honda ,  Hirofumi Isomura ,  Tomohisa Kishigami ,  Hiroyuki Mori ,  Yasuhiro Mori ,  Yuki Horii

IPC: H03K5/08 ,  H03K5/1252 ,  H03K3/037 ,  H04B3/20 ,  H03K5/24 ,  H03K5/00

Abstract: A ringing suppression circuit, which is connected to a transmission line for transmitting a differential signal changeable between a high level and a low level in a binary level through a pair of a high potential side signal line and a low potential side signal line, and suppresses ringing that occurs in association with transmission of the differential signal, includes: an inter-line switching element that is connected to the pair of the high potential side signal line and the low potential side signal line; and a control unit that turns on the inter-line switching element and fixes an on state when detecting that the differential signal changes from the high level to the low level, and releases the on state after a predetermined time is measured and elapsed.

公开(公告)号：US10027364B2

公开(公告)日：2018-07-17

申请号：US15663888

申请日：2017-07-31

Applicant: DENSO CORPORATION

Inventor： Naoya Tsuchiya ,  Tomohisa Kishigami

IPC: H04B1/40

Abstract: A differential communication circuit includes: a first switch in between a signal line and a power source, a second switch in between a signal line and a ground, a third switch in between the signal line and the ground, a fourth switch in between the signal line and the power source, first and second drivers respectively driving the first and second switches, and third and fourth drivers respectively driving the third and fourth switches OFF to ON at an ON to OFF timing of the first and second switches, for setting an ON period of the third and fourth switches to be shorter than a one-bit width in a communication signal and enabling a stable signal level determination while reducing power consumption of the differential communication circuit.

公开(公告)号：US09800319B2

公开(公告)日：2017-10-24

申请号：US14821879

申请日：2015-08-10

Applicant: DENSO CORPORATION

Inventor： Tetsuo Nakagawa ,  Tomohisa Kishigami

IPC: H04L12/28 ,  H04B7/155 ,  H04B1/3822

CPC classification number: H04B7/15528 ,  H04B1/3822 ,  H04B7/15542

Abstract: A relay apparatus provided to a vehicle, performing first data communication with a first communication apparatus arranged outside the vehicle, and performing at least second data communication with multiple second communication apparatuses provided to the vehicle is provided. The relay apparatus includes a permission determination portion and an initiation switch portion. The permission determination portion determines whether first data communication between the first communication apparatus and a target second communication apparatus is permitted. The permission determination portion receives the first communication frame from the first communication apparatus through a connection switch portion determining a connection destination according to a control signal. The initiation switch portion outputs to the connection switch portion, the control signal designating the target second communication apparatus as the connection destination of the first communication apparatus.

公开(公告)号：US09497177B2

公开(公告)日：2016-11-15

申请号：US13740512

申请日：2013-01-14

Applicant: DENSO CORPORATION

Inventor： Kouji Fujiki ,  Tomohisa Kishigami ,  Yoshinori Takai ,  Yasumasa Imai

IPC: H04L29/06 ,  H04L12/40 ,  H04L12/46

CPC classification number: H04L63/08 ,  H04L12/40006 ,  H04L12/4625 ,  H04L2012/40273

Abstract: A communications relay apparatus for relaying communications between an electronic control unit (ECU) connected to the apparatus via an in-vehicle local area network (LAN) and an external device connected to the apparatus via a communication path different from the in-vehicle LAN. In the apparatus, a data transfer unit forwards relay data received from the ECU to the communication path and forwards relay data received from the external device to the in-vehicle LAN. But the data transfer unit is inhibited from forwarding reprogramming data for reprogramming the ECU received from the external device to the in-vehicle LAN. An authentication unit authenticates a vehicle user, and when the vehicle user is successfully authenticated, then permits the data transfer unit to forward the reprogramming data to the in-vehicle LAN.

Abstract translation: 一种用于经由车载局域网（LAN）连接到装置的电子控制单元（ECU）和经由与车载LAN不同的通信路径连接到装置的外部设备之间的通信中继通信中继装置。 在该装置中，数据传送单元将从ECU接收的中继数据转发到通信路径，并将从外部设备接收的中继数据转发到车载LAN。 但是禁止数据传送单元转发重新编程数据，以便将从外部设备接收的ECU重新编程到车载LAN。 验证单元认证车辆用户，并且当车辆用户被成功认证时，允许数据传送单元将重新编程数据转发到车载LAN。

公开(公告)号：US09270505B2

公开(公告)日：2016-02-23

申请号：US14669093

申请日：2015-03-26

Applicant: DENSO CORPORATION ,  NIPPON SOKEN, INC.

Inventor： Hiroyuki Mori ,  Keiji Shigeoka ,  Hideki Kashima ,  Tomohisa Kishigami

IPC: H02K7/08 ,  H04L25/49 ,  H04B3/54

CPC classification number: H04L25/4902 ,  H04B3/54

Abstract: Each of nodes in a communication system includes a pull-up circuit connected between a power source and a transmission line and a switching portion connecting and disconnecting the transmission line and a ground line. One of the nodes is a master node, and the others of the nodes are slave nodes. The driver circuits are driven so that the master node constantly outputs the transmission code of logic 1 and the slave node outputting the transmission code of logic 0 extends the width of the low level of the transmission code of logic 1 on the transmission line. The master node further includes a current limiting section limiting an electric current that flows to the transmission line via the pull-up circuit based on at least a signal level of the transmission line.

Abstract translation: 通信系统中的每个节点包括连接在电源和传输线之间的上拉电路以及连接和断开传输线和接地线的切换部分。 其中一个节点是主节点，其他节点是从节点。 驱动电路被驱动，使得主节点不断输出逻辑1的发送代码，并且输出逻辑0的发送代码的从节点在传输线上扩展逻辑1的发送代码的低电平的宽度。 主节点还包括电流限制部分，其基于至少传输线的信号电平，限制经由上拉电路流到传输线的电流。

公开(公告)号：US09154175B2

公开(公告)日：2015-10-06

申请号：US14134338

申请日：2013-12-19

Applicant: DENSO CORPORATION ,  ANDEN CO., LTD.

Inventor： Hideki Kashima ,  Tomohisa Kishigami ,  Naoji Kaneko ,  Nobutomo Takagi

IPC: H04B1/40 ,  B60R16/03 ,  H04L25/49 ,  H04L12/403 ,  H04J3/06 ,  H04L12/40

CPC classification number: H04B1/40 ,  B60R16/03 ,  H04J3/0697 ,  H04L7/033 ,  H04L12/4035 ,  H04L25/03834 ,  H04L25/4902 ,  H04L2012/40215 ,  H04L2012/40273

Abstract: A transceiver that transmits and receives data used in a communication system, in which the data is encoded by a transmission line code and a signal level of the transmission code changes at a predetermined transition timing in a bit-duration. The transceiver includes: a clock generator that generates an internal clock used for internal circuits; a timing generator that generates, by using the internal clock generated by the clock generator, a timing signal synchronized to a reference clock supplied externally; an encoding circuit that encodes, by using the timing signal generated by the timing generator, a transmission data which is synchronized to the reference clock to be the transmission line code; and a waveform shaping unit that performs a waveform shaping of a waveform at the predetermined transition timing of the transmission data to be based on the reference clock.

Abstract translation: 发送和接收在通信系统中使用的数据的收发器，其中数据由传输线码编码，并且传输码的信号电平在比特持续时间内在预定的转换定时改变。 收发器包括：产生用于内部电路的内部时钟的时钟发生器; 定时发生器，其通过使用由时钟发生器产生的内部时钟产生与外部提供的参考时钟同步的定时信号; 编码电路，通过使用由定时发生器产生的定时信号，将与基准时钟同步的发送数据编码为传输线路码; 以及波形整形单元，其基于所述参考时钟在所述发送数据的所述预定转换定时处执行波形的波形整形。

公开(公告)号：US20130185766A1

公开(公告)日：2013-07-18

申请号：US13740512

申请日：2013-01-14

Applicant: Denso Corporation

Inventor： Kouji Fujiki ,  Tomohisa Kishigami ,  Yoshinori Takai ,  Yasumasa Imai

IPC: H04L29/06

CPC classification number: H04L63/08 ,  H04L12/40006 ,  H04L12/4625 ,  H04L2012/40273

Abstract: A communications relay apparatus for relaying communications between an electronic control unit (ECU) connected to the apparatus via an in-vehicle local area network (LAN) and an external device connected to the apparatus via a communication path different from the in-vehicle LAN. In the apparatus, a data transfer unit forwards relay data received from the ECU to the communication path and forwards relay data received from the external device to the in-vehicle LAN. But the data transfer unit is inhibited from forwarding reprogramming data for reprogramming the ECU received from the external device to the in-vehicle LAN. An authentication unit authenticates a vehicle user, and when the vehicle user is successfully authenticated, then permits the data transfer unit to forward the reprogramming data to the in-vehicle LAN.

Abstract translation: 一种用于经由车载局域网（LAN）连接到装置的电子控制单元（ECU）和经由与车载LAN不同的通信路径连接到装置的外部设备之间的通信中继通信中继装置。 在该装置中，数据传送单元将从ECU接收的中继数据转发到通信路径，并将从外部设备接收的中继数据转发到车载LAN。 但是禁止数据传送单元转发重新编程数据，以便将从外部设备接收的ECU重新编程到车载LAN。 验证单元认证车辆用户，并且当车辆用户被成功认证时，允许数据传送单元将重新编程数据转发到车载LAN。

公开(公告)号：US11582062B2

公开(公告)日：2023-02-14

申请号：US17510491

申请日：2021-10-26

Applicant: DENSO CORPORATION

Inventor： Hisashi Miyoshi ,  Tomohisa Kishigami

IPC: H04L12/40 ,  H04B3/36 ,  H04L12/46

Abstract: A relay device relays a management frame between nodes connected to mutually different communication buses. The relay device includes (i) communicator units provided respectively to correspond to the communication buses, and (ii) communication controller units provided respectively to correspond to the communicator units. The communication controller unit respectively includes a corresponding transmission buffer configured to store the management frame, which is to be transmitted from the communicator unit corresponding to the communication controller unit. In response to determining that the management frame is retained in the transmission buffer corresponding to the communication controller unit, the communication controller unit transmits the management frame, which is received at a present time and stored in the transmission buffer, from the communicator unit corresponding to the communication controller unit.

公开(公告)号：US10355876B2

公开(公告)日：2019-07-16

申请号：US15498861

申请日：2017-04-27

Applicant: DENSO CORPORATION

Inventor： Tomohisa Kishigami ,  Shuichi Nakamura

IPC: H04B1/40 ,  H04L1/24 ,  H04L12/26 ,  H04L12/40

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. 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.

公开(公告)号：US10313152B2

公开(公告)日：2019-06-04

申请号：US15662535

申请日：2017-07-28

Applicant: DENSO CORPORATION

Inventor： Tomohisa Kishigami ,  Shuichi Nakamura

IPC: H04L12/46 ,  H03F3/24 ,  H04B3/54 ,  H04J3/22 ,  H04L25/02 ,  H04L12/40

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.