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1. 发明授权

US10164620B1 Ringing suppression circuit 有权
公开(公告)号：US10164620B1
公开(公告)日：2018-12-25
申请号：US15748749
申请日：2016-08-25
申请人： DENSO CORPORATION , SOKEN, INC.
发明人： Takuya Honda , Hirofumi Isomura , Tomohisa Kishigami , Hiroyuki Mori , Yasuhiro Mori , Yuki Horii
IPC分类号： H03K5/08 , H03K5/1252 , H03K3/037 , H04B3/20 , H03K5/24 , H03K5/00
摘要： 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.

2. 发明授权

US10027364B2 Differential communication circuit 有权
公开(公告)号：US10027364B2
公开(公告)日：2018-07-17
申请号：US15663888
申请日：2017-07-31
申请人： DENSO CORPORATION
发明人： Naoya Tsuchiya , Tomohisa Kishigami
IPC分类号： H04B1/40
摘要： 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.

3. 发明授权

US09800319B2 Relay apparatus 有权
公开(公告)号：US09800319B2
公开(公告)日：2017-10-24
申请号：US14821879
申请日：2015-08-10
申请人： DENSO CORPORATION
发明人： Tetsuo Nakagawa , Tomohisa Kishigami
IPC分类号： H04L12/28 , H04B7/155 , H04B1/3822
CPC分类号： H04B7/15528 , H04B1/3822 , H04B7/15542
摘要： 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.

4. 发明授权

US09497177B2 Communications relay apparatus 有权
标题翻译：通信中继装置
公开(公告)号：US09497177B2
公开(公告)日：2016-11-15
申请号：US13740512
申请日：2013-01-14
申请人： DENSO CORPORATION
发明人： Kouji Fujiki , Tomohisa Kishigami , Yoshinori Takai , Yasumasa Imai
IPC分类号： H04L29/06 , H04L12/40 , H04L12/46
CPC分类号： H04L63/08 , H04L12/40006 , H04L12/4625 , H04L2012/40273
摘要： 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.
摘要翻译：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。

5. 发明授权

US09270505B2 Communication system 有权
标题翻译：通讯系统
公开(公告)号：US09270505B2
公开(公告)日：2016-02-23
申请号：US14669093
申请日：2015-03-26
申请人： DENSO CORPORATION , NIPPON SOKEN, INC.
发明人： Hiroyuki Mori , Keiji Shigeoka , Hideki Kashima , Tomohisa Kishigami
IPC分类号： H02K7/08 , H04L25/49 , H04B3/54
CPC分类号： H04L25/4902 , H04B3/54
摘要： 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.
摘要翻译：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。

6. 发明授权

US09154175B2 Transceiver and communication apparatus transmitting and receiving data encoded by transmission code 有权
标题翻译：收发器和通信装置发送和接收由传输码编码的数据
公开(公告)号：US09154175B2
公开(公告)日：2015-10-06
申请号：US14134338
申请日：2013-12-19
申请人： DENSO CORPORATION , ANDEN CO., LTD.
发明人： Hideki Kashima , Tomohisa Kishigami , Naoji Kaneko , Nobutomo Takagi
IPC分类号： H04B1/40 , B60R16/03 , H04L25/49 , H04L12/403 , H04J3/06 , H04L12/40
CPC分类号： H04B1/40 , B60R16/03 , H04J3/0697 , H04L7/033 , H04L12/4035 , H04L25/03834 , H04L25/4902 , H04L2012/40215 , H04L2012/40273
摘要： 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.
摘要翻译：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。

7. 发明申请

US20130185766A1 COMMUNICATIONS RELAY APPARATUS 有权
标题翻译：通讯继电器
公开(公告)号：US20130185766A1
公开(公告)日：2013-07-18
申请号：US13740512
申请日：2013-01-14
申请人： Denso Corporation
发明人： Kouji Fujiki , Tomohisa Kishigami , Yoshinori Takai , Yasumasa Imai
IPC分类号： H04L29/06
CPC分类号： H04L63/08 , H04L12/40006 , H04L12/4625 , H04L2012/40273
摘要： 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.
摘要翻译：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。

8. 发明授权

US10666320B2 Ringing suppression circuit 有权
公开(公告)号：US10666320B2
公开(公告)日：2020-05-26
申请号：US16201216
申请日：2018-11-27
申请人： DENSO CORPORATION
发明人： Takuya Honda , Hirofumi Isomura , Tomohisa Kishigami
IPC分类号： H04B3/42 , H04L25/02 , H03K19/0175 , H03K5/1252
摘要： A ringing suppression circuit is provided at one or more nodes each having a communication circuit executing communication with another node by transmitting a differential signal through a pair of communication lines connected to the nodes. The circuit includes a suppression circuit and an operation mode controller: The suppression circuit is configured to execute a suppression operation for suppressing ringing in the differential signal. The operation mode controller is configured to set an operation mode of the suppression circuit to one of: a normal operation mode, which enables the suppression circuit to execute the suppression operation in response to detecting a change in a level of the differential signal, and a permanent off mode, which disables the suppression circuit to execute the suppression operation on a steady basis.

9. 发明授权

US10445493B2 Information processing system 有权
公开(公告)号：US10445493B2
公开(公告)日：2019-10-15
申请号：US15459444
申请日：2017-03-15
申请人： DENSO CORPORATION
发明人： Hiroki Suzuki , Tomohisa Kishigami
IPC分类号： G06F21/51 , B60Q9/00
摘要： An information processing system made up of a plurality of controllers in a vehicle has a tamperproof configuration by including, in a specific controller among the plurality of controllers: a starter putting the specific controller among the plurality of controllers in a executable state which enables the specific controller among the plurality of controllers to execute a preset program; a determiner determining, before the specific controller among the plurality of controllers is put in the executable state, whether software that is memorized in a preset memory area and at least includes the preset program is tampered; and an outputter outputting, to one of processing devices outside the vehicle. In such manner, the tampering of the software is quickly detectable while preventing an increase of communication load of a communication network and/or the information processing system.

10. 发明授权

US10432188B2 Ringing suppression circuit and ringing suppression method 有权
公开(公告)号：US10432188B2
公开(公告)日：2019-10-01
申请号：US16099711
申请日：2017-08-04
申请人： DENSO CORPORATION , SOKEN, INC.
发明人： Hiroyuki Mori , Takuya Honda , Tomohisa Kishigami , Hirofumi Isomura
IPC分类号： H03K17/16 , H04L25/02
摘要： A ringing suppression circuit connected to a transmission line to suppress ringing caused by the transmission line transmitting a differential signal using a pair of signal lines, the differential signal varying between a high level and a low level, the pair of signal lines including a high potential signal line and a low potential signal line, the ringing suppression circuit including: an inter-line switching element that is connected between the pair of signal lines; a control portion that performs a ringing suppression operation in response to detecting a level change in the differential signal, wherein the ringing suppression operation turns on the inter-line switching element to decrease an impedance between the pair of signal lines; and a suppression operation prohibiting portion that prohibits the control portion from performing the ringing suppression operation in response to detecting a signal caused by a signal on the transmission line.

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