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公开(公告)号：US10419071B2
公开(公告)日：2019-09-17
申请号：US16252793
申请日：2019-01-21
Applicant: DENSO CORPORATION
Inventor： Takuya Honda , Hirofumi Isomura , Tomohisa Kishigami
IPC: H04B3/00 , H04B3/42 , H03K19/0175 , H03K19/0185 , H04B3/02 , H04L25/02 , H03K5/1252 , H03K17/687
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.
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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
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.
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公开(公告)号：US10224925B2
公开(公告)日：2019-03-05
申请号：US15741075
申请日：2016-06-08
Applicant: DENSO CORPORATION , SOKEN, INC.
Inventor： Hiroyuki Mori , Takuya Honda , Tomohisa Kishigami , Hirofumi Isomura
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.
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Patent Agency Ranking
公开(公告)号：US09660651B2
公开(公告)日：2017-05-23
申请号：US15140841
申请日：2016-04-28
Applicant: DENSO CORPORATION
Inventor： Takuya Honda , Hirofumi Isomura
IPC: H03K19/0185 , H03K19/0175
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.
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公开(公告)号：US10666320B2
公开(公告)日：2020-05-26
申请号：US16201216
申请日：2018-11-27
Applicant: DENSO CORPORATION
Inventor： Takuya Honda , Hirofumi Isomura , Tomohisa Kishigami
IPC: H04B3/42 , H04L25/02 , H03K19/0175 , H03K5/1252
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.
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公开(公告)号：US10432188B2
公开(公告)日：2019-10-01
申请号：US16099711
申请日：2017-08-04
Applicant: DENSO CORPORATION , SOKEN, INC.
Inventor： Hiroyuki Mori , Takuya Honda , Tomohisa Kishigami , Hirofumi Isomura
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.
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公开(公告)号：US10128825B2
公开(公告)日：2018-11-13
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: H03K5/08 , H03K5/1252 , H04B3/42 , H03K17/687
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.
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公开(公告)号：US08841954B2
公开(公告)日：2014-09-23
申请号：US13913655
申请日：2013-06-10
Applicant: DENSO CORPORATION
Inventor： Takuya Honda , Takuya Harada
IPC: H03K3/013 , H03K3/012 , H03K5/1252
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。
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