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公开(公告)号：US12047206B2
公开(公告)日：2024-07-23
申请号：US17868057
申请日：2022-07-19
Inventor： Shigeki Otsuka , Hyoungjun Na , Takasuke Ito , Yoshikazu Furuta , Tomohiro Nezuka
IPC: H04L25/02 , H03K17/687
CPC classification number: H04L25/0272 , H03K17/6872 , H04L25/028
Abstract: A differential transmission circuit for a communication device performs bidirectional communication via a differential transmission line. The differential transmission circuit include: output transistors that are turned on and off according to a drive signal during a transmission period; a signal generation unit that generates and outputs the drive signal; short-circuit transistors connected between gates and drains of the output transistors; and a cut off unit that cuts off a supply path of the drive signal between the signal generation unit and the gates of the output transistors. The cut off unit cuts off the supply path of the drive signal during a reception period in which a reception operation is performed by the communication device.
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公开(公告)号：US11946956B2
公开(公告)日：2024-04-02
申请号：US17545033
申请日：2021-12-08
Applicant: DENSO CORPORATION
Inventor： Takasuke Itou , Tomohiro Nezuka , Yasuaki Aoki , Yuuta Nakamura , Takashi Yoshiya
IPC: G01R19/165 , H03F3/04 , H03K5/24
CPC classification number: G01R19/165 , H03F3/04 , H03K5/24
Abstract: A signal detection circuit detects, as a detection target signal, a signal of a main terminal of a switching element by comparing the detection target signal with a reference signal. The signal detection circuit includes: a signal generation unit generating the reference signal; a first capacitor having a first terminal connected with the main terminal of the switching element; a second capacitor having a first terminal connected with an output terminal of the signal generation unit; and a detection circuit receiving, as input signals, a signal output from a second terminal of the first capacitor and a signal output from a second terminal of the second capacitor, and the detection circuit detecting the detection target signal based on the input signals.
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公开(公告)号：US11846656B2
公开(公告)日：2023-12-19
申请号：US17834061
申请日：2022-06-07
Inventor： Tomohiro Nezuka , Yoshikazu Furuta , Shotaro Wada
IPC: G01R15/14 , G01R19/252
CPC classification number: G01R15/146 , G01R19/252
Abstract: A current sensor for detecting a current based on a terminal voltage and a resistance value of a shunt resistor, includes: a resistance value correction circuit having: correction resistors; a signal application unit; a voltage detection unit that detects terminal voltages of the shunt resistor and a part of the correction resistors in a first period, and terminal voltages of all of the correction resistors in a second period; and a correction unit that corrects the resistance value for current detection based on a calculated resistance value of the shunt resistor. Resistance values and resistance accuracies of the correction resistors are higher as the plurality of correction resistors are disposed farther from the shunt resistor.
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公开(公告)号：US11784612B2
公开(公告)日：2023-10-10
申请号：US17545035
申请日：2021-12-08
Applicant: DENSO CORPORATION
Inventor： Takasuke Itou , Tomohiro Nezuka , Yasuaki Aoki , Yuuta Nakamura , Takashi Yoshiya
CPC classification number: H03F3/005 , G11C27/024 , H03F3/45
Abstract: A signal detection circuit includes: a first capacitor having a first terminal connected with a first main terminal of a switching element; a second capacitor having a first terminal connected with a second main terminal of the switching element; and a detection circuit having a differential circuit configuration. The detection circuit receives, as input signals, a signal from a second terminal of the first capacitor and a signal from a second terminal of the second capacitor, detects detection target signals based on the input signals. The detection target signals include a signal of the first main terminal of the switching element and a signal of the second main terminal of the switching element.
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公开(公告)号：US10156613B2
公开(公告)日：2018-12-18
申请号：US15278306
申请日：2016-09-28
Applicant: DENSO CORPORATION
Inventor： Kazutaka Honda , Tomohiro Nezuka
IPC: G01R31/36
Abstract: An A/D conversion device acquires an inter-terminal signal of one or more battery cells when detecting a voltage across the battery cells. The A/D conversion device acquires a failure diagnosis signal during a failure diagnosis. A control unit causes the A/D conversion device to perform A/D conversion processing in a ΔΣ mode or a hybrid mode, in which acquiring remaining bits of higher bits after subjecting the higher bits to a ΔΣ type A/D conversion processing, when detecting the inter-terminal signal of the battery cells. The control unit causes the A/D conversion device to perform the A/D conversion processing in a cyclic mode or a hybrid mode, when detecting the failure diagnosis signal during the failure diagnosis.
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Patent Agency Ranking
公开(公告)号：US10054502B2
公开(公告)日：2018-08-21
申请号：US15048014
申请日：2016-02-19
Applicant: DENSO CORPORATION
Inventor： Tomohiro Nezuka
CPC classification number: G01L1/2262 , G01K7/20 , G01L9/045
Abstract: A sensor driving device drives a sensor circuit formed of a Wheatstone bridge, which is connected between a main power supply for supplying a power supply potential and a reference power supply for supplying a reference potential lower than the power supply potential and includes at least one gauge resistor varying a resistance value thereof with deformation caused by external force. The sensor driving device includes a first resistor, which is connected in series with the sensor circuit between the main power supply and the sensor circuit, and a second resistor, which is connected between the sensor circuit and the reference power supply. The sensor driving device further includes a temperature output circuit connected in parallel to the sensor circuit relative to the main power supply. The temperature output circuit includes two output terminals, which output a potential difference smaller than a potential difference between one end of a main power supply side and one end of a reference power supply side.
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公开(公告)号：US09419641B1
公开(公告)日：2016-08-16
申请号：US14994564
申请日：2016-01-13
Applicant: DENSO CORPORATION
Inventor： Shogo Kawahara , Tomohiro Nezuka
IPC: H03M1/66
Abstract: A D/A converter is configured to output tri-level potentials from an output terminal. A high potential terminal and the output terminal are connected through a p-type MOS transistor. An intermediate potential terminal and the output terminal are connected through p-type and n-type MOS transistors, which are connected in series and have low threshold voltages. A low potential terminal and the output terminal are connected through an n-type MOS transistor. The p-type MOS transistor and the n-type MOS transistor connected to the Intermediate potential terminal have a positive voltage and a negative voltage between gate-source paths in off-states, respectively, and a substrate bias effect and hence remain in the off-state stably.
Abstract translation: D / A转换器被配置为从输出端子输出三电平电位。 高电位端子和输出端子通过p型MOS晶体管连接。 中间电位端子和输出端子通过串联连接并具有低阈值电压的p型和n型MOS晶体管连接。 低电位端子和输出端子通过n型MOS晶体管连接。 连接到中间电位端子的p型MOS晶体管和n型MOS晶体管分别具有在截止状态下的栅极 - 源极之间的正电压和负电压以及衬底偏置效应，因此保持在截止状态 状态稳定。
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公开(公告)号：US12270862B2
公开(公告)日：2025-04-08
申请号：US18153450
申请日：2023-01-12
Applicant: DENSO CORPORATION
Inventor： Yoshikazu Furuta , Soya Taniguchi , Tomohiro Nezuka , Kazutaka Honda
IPC: G01R31/396 , G01R31/367 , G01R31/3842 , G01R31/389
Abstract: A battery monitor system includes: a reference signal generation unit; an excitation signal generation unit; a current generation unit for an excitation current; a current measurement unit for the excitation current; a voltage measurement unit for a voltage of each battery cell; an impedance measurement unit for an impedance of each battery cell; a noise measurement unit for a noise voltage; and a control unit. The control unit selects one or more battery cells not a measurement target, and the noise measurement unit measures the noise voltage near a measurement frequency equal to a frequency of an orthogonal reference signal while operating the voltage measurement unit without operating the current generation unit.
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公开(公告)号：US12255753B2
公开(公告)日：2025-03-18
申请号：US18187123
申请日：2023-03-21
Inventor： Yoshikazu Furuta , Shigeki Otsuka , Takasuke Ito , Hyoungjun Na , Tomohiro Nezuka
IPC: H04L12/40 , G01R31/396
Abstract: An insulated communication system includes a communication controller that sets communication data to a communication symbol through a numeral system and executes insulated communication through an insulator by adopting the communication symbol. The numeral system includes multiple states having a positive state, a negative state and a zero state. The positive state is represented by at least one positive integer, and the negative state is represented by at least one negative integer. The zero state is represented by zero being a level without generating current consumption. An absolute value of the at least one positive integer and an absolute value of the at least one negative integer are identical to each other. The communication controller sets an initial section of the communication data in the communication symbol to the positive state or the negative state, and sets a following section of the communication data to one of the multiple states.
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公开(公告)号：US12149387B2
公开(公告)日：2024-11-19
申请号：US17705631
申请日：2022-03-28
Applicant: DENSO CORPORATION
Inventor： Takasuke Ito , Yoshikazu Furuta , Shigeki Otsuka , Tomohiro Nezuka
IPC: H04L25/02 , H03K19/0185 , H03K19/20 , H04B1/04
Abstract: A differential communication driver circuit includes a drive unit that drives differential signal lines connected via capacitors by a source current and a sink current. When a noise detection unit detects that in-phase noise is applied to the differential signal lines, a drive assisting unit maintains an amplitude of a differential signal output to the differential signal lines by increasing a current drive capability of the sink current.
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