公开(公告)号：US20190190516A1

公开(公告)日：2019-06-20

申请号：US16099711

申请日：2017-08-04

Applicant: DENSO CORPORATION ,  SOKEN, INC.

Inventor： Hiroyuki MORI ,  Takuya HONDA ,  Tomohisa KISHIGAMI ,  Hirofumi ISOMURA

IPC: H03K17/16 ,  H04L25/02

CPC classification number: H03K17/16 ,  H04L25/026 ,  H04L25/028 ,  H04L25/0288

Abstract: 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.

公开(公告)号：US20200287579A1

公开(公告)日：2020-09-10

申请号：US16878673

申请日：2020-05-20

Applicant: DENSO CORPORATION

Inventor： Takuya HONDA ,  Tomohisa KISHIGAMI

IPC: H04B1/04 ,  H03K17/16

Abstract: A control unit of a suppression circuit turns on an inter-line switching element and maintains an ON state upon detection of a change in the level of a differential signal from high level to low level, and cancels the ON state after a predetermined period of time is measured. A continuous activation prevention unit sets a predetermined mask time period from the time of turning on the inter-line switching element, and masking is performed to prevent the control unit from detecting a change in the level of the differential signal from the high level to the low during the mask time period.

公开(公告)号：US20180367127A1

公开(公告)日：2018-12-20

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: H03K5/1252 ,  H03K3/037 ,  H04B3/20

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：US20190158143A1

公开(公告)日：2019-05-23

申请号：US16252793

申请日：2019-01-21

Applicant: DENSO CORPORATION

Inventor： Takuya HONDA ,  Hirofumi ISOMURA ,  Tomohisa KISHIGAMI

IPC: H04B3/42 ,  H03K5/1252

CPC classification number: H04B3/42 ,  H03K5/1252 ,  H03K17/687 ,  H03K19/0175 ,  H03K19/0185 ,  H04B3/30 ,  H04L25/02

Abstract: A ringing suppression circuit is provided at a node having a communication circuit executing communication with another node by transmitting a differential signal through a pair of communication lines. The ringing suppression circuit includes: a suppressor configured to perform a suppression operation to suppress ringing occurred with a transmission of the differential signal by connecting a resistive component between the pair of communication lines; and a reference potential provider configured to provide a reference potential, which corresponds to a midpoint potential of the pair of communication lines during a steady state, to an intermediate point of the resistive component.

公开(公告)号：US20170019090A1

公开(公告)日：2017-01-19

申请号：US15140841

申请日：2016-04-28

Applicant: DENSO CORPORATION

Inventor： Takuya HONDA ,  Hirofumi ISOMURA

IPC: H03K3/356 ,  H03K19/0185

CPC classification number: H03K19/018521 ,  H03K3/356034 ,  H03K19/017509

Abstract: An input part is supplied with a low voltage from a low voltage power supply line. A level shift part and an output part are supplied with a high voltage from a high voltage power supply line. An input terminal is pulled up by a resistor and connected to the level shift part through a buffer circuit and an inverter circuit. The level shift part is connected in series with an NMOS and turned on when the input terminal changes to a low level. The output terminal is pulled up by a resistor through the buffer circuit. Even when the level shift part operates unstably because of long delay time from rising of a potential of the high voltage power supply line to rising of a potential of the low voltage power supply line, the output voltage is maintained at a high level.

Abstract translation: 输入部分由低电压电源线提供低电压。 电平移位部分和输出部分由高压电源线提供高电压。 输入端子由电阻器上拉并通过缓冲电路和反相器电路连接到电平移位部分。 电平移位部分与NMOS串联连接，当输入端子变为低电平时导通。 输出端由电阻通过缓冲电路上拉。 即使由于高电压电源线的电位升高到低电压电源线的电位上升的延迟时间长，电平偏移部也不稳定，所以输出电压保持在高电平。

公开(公告)号：US20190158144A1

公开(公告)日：2019-05-23

申请号：US16252805

申请日：2019-01-21

Applicant: DENSO CORPORATION

Inventor： Takuya HONDA ,  Hirofumi ISOMURA ,  Tomohisa KISHIGAMI

IPC: H04B3/42 ,  H03K5/1252

Abstract: A ringing suppression circuit is provided at a node having a communication circuit executing communication with another node by transmitting a differential signal through a pair of communication lines. The ringing suppression circuit includes a suppressor configured to perform a suppression operation to suppress ringing occurred with a transmission of the differential signal by connecting an adjustment circuit between the pair of communication lines. The adjustment circuit includes a resistive component and a capacitive component connected in series.

公开(公告)号：US20190097681A1

公开(公告)日：2019-03-28

申请号：US16201216

申请日：2018-11-27

Applicant: DENSO CORPORATION

Inventor： Takuya HONDA ,  Hirofumi ISOMURA ,  Tommohisa KISHIGAMI

IPC: H04B3/42

Abstract: 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.

公开(公告)号：US20180248542A1

公开(公告)日：2018-08-30

申请号：US15753596

申请日：2016-08-25

Applicant: DENSO CORPORATION ,  SOKEN, INC.

Inventor： Hiroyuki MORI ,  Takuya HONDA ,  Tomohisa KISHIGAMI ,  Hirofumi ISOMURA

IPC: H03K5/1252 ,  H03K17/687 ,  H04B3/42

CPC classification number: H03K5/1252 ,  H03K5/08 ,  H03K17/163 ,  H03K17/687 ,  H03K19/00346 ,  H04B3/42

Abstract: A ringing suppression circuit includes: a single line switching element, which is driven by a voltage, that is connected between a pair of signal lines; a controller that detects a change in a level of the differential signal and turns on the single line switching element to lower an impedance between the pair of signal lines; a period detector that detects a length of a suppressing period indicated by a setting signal, which is an input; and a suppressing period storage that stores the length of the suppressing period which is detected by the period detector. In addition, the pair of signal lines includes a high potential signal line and a low potential signal line. Moreover, the controller turns on the single line switching element for only the suppressing period having the length, which is stored in the suppressing period storage.

公开(公告)号：US20180198443A1

公开(公告)日：2018-07-12

申请号：US15741075

申请日：2016-06-08

Applicant: DENSO CORPORATION ,  SOKEN, INC.

Inventor： Hiroyuki MORI ,  Takuya HONDA ,  Tomohisa KISHIGAMI ,  Hirofumi ISOMURA

IPC: H03K17/16 ,  H04L25/02 ,  H04L25/12

CPC classification number: H03K17/164 ,  H01L2924/13091 ,  H04L25/02 ,  H04L25/026 ,  H04L25/12

Abstract: A communication node is connected to a transmission line which transmits a differential signal changeable between a high level and a low level and has a high potential signal line and a low potential signal line as a pair of signal lines. The communication node includes: an inter-line potential detector that detects an intermediate potential between the pair of signal lines; a node potential detector that detects an intermediate potential of an operation power source voltage which is supplied to the communication node; and a voltage adjuster that detects a difference between the intermediate potential detected by the inter-line potential detector and the intermediate potential detected by the node potential detector, and adjusts the operation power source voltage in accordance with the difference.

公开(公告)号：US20130335125A1

公开(公告)日：2013-12-19

申请号：US13913655

申请日：2013-06-10

Applicant: DENSO CORPORATION

Inventor： Takuya HONDA ,  Takuya HARADA

IPC: H03K3/012

CPC classification number: H03K3/012 ,  H03K5/1252

Abstract: An input signal processing device includes an oscillator circuit, a signal processing circuit, and a control circuit. The oscillator circuit performs an oscillation operation to output a clock signal. The signal processing circuit operates based on the clock signal outputted from the oscillator circuit. The signal processing circuit performs a predetermined process to an input signal when a level of the input signal changes and outputs a signal after the predetermined process. The control circuit instructs the oscillator circuit to start the oscillation operation based on a level change of the input signal. The control circuit instructs the oscillator circuit to stop the oscillation operation when the signal processing circuit finishes the predetermined process.

Abstract translation: 输入信号处理装置包括振荡电路，信号处理电路和控制电路。 振荡器电路执行振荡操作以输出时钟信号。 信号处理电路根据从振荡电路输出的时钟信号进行工作。 当输入信号的电平改变时，信号处理电路对输入信号执行预定处理，并在预定处理之后输出信号。 控制电路根据输入信号的电平变化指示振荡电路开始振荡动作。 当信号处理电路完成预定的处理时，控制电路指令振荡器电路停止振荡操作。