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公开(公告)号：US11342837B2
公开(公告)日：2022-05-24
申请号：US17091130
申请日：2020-11-06
Applicant: DENSO CORPORATION
Inventor： Shigeki Otsuka
Abstract: A short-circuit determination device is provided in a switching power supply device. The switching power supply device converts a power supply voltage applied between an upper power supply line and a lower power supply line and outputs the power supply voltage to a load through an intermediate node. The switching power supply device includes a plurality of upper switching elements and a lower switching element. Each of the plurality of upper switching elements has an electrical conduction terminal and a control terminal. The electrical conduction terminals are connected in series between the upper power supply line and the intermediate node. The control terminals are driven at a same level as each other. The lower switching element has an electrical conduction terminal connected between the lower power supply line and the intermediate node. The lower switching element and the plurality of upper switching elements are connected in series.
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公开(公告)号：US11182669B2
公开(公告)日：2021-11-23
申请号：US16550664
申请日：2019-08-26
Applicant: DENSO CORPORATION
Inventor： Shigeki Otsuka , Irina Kataeva
Abstract: A neural network circuit is provided. The neural network circuit includes a memory device including memristors connected in a matrix, a controller arranged to control a voltage application device to perform writing, deleting and reading data in the memory device, multiple current-to-voltage (I-V) conversion amplifier circuits arranged to convert currents flowing through the memory elements into voltages and outputting the voltages, and multiple current adjusters respectively corresponding to the I-V conversion amplification circuits, each current adjuster being arranged to adjust a total current value input to a corresponding I-/V conversion amplification circuit to zero.
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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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公开(公告)号：US11890949B2
公开(公告)日：2024-02-06
申请号：US17722444
申请日：2022-04-18
Inventor： Hyoungjun Na , Yoshikazu Furuta , Shigeki Otsuka , Takasuke Ito , Tomohiro Nezuka
CPC classification number: B60L3/0084 , B60L3/0092 , G06F13/4247 , H01M10/425 , H01M2010/4271
Abstract: In a communication system, a control unit and driver units are connected in a daisy chain; each unit includes a corresponding insulated communication circuit, respectively. The control unit measures a communication delay time between the control unit and each driver unit from a response time to transmission of a pulse signal performed to each driver unit during a measurement period. Then, based on each communication delay time, the control unit transmits a shift time to each driver unit for equalizing the timing of signals output by the driver units. When each driver unit receives, from the control unit, an instruction instructing each driver unit to output a signal, each driver unit outputs the signal when the shift time has elapsed.
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Patent Agency Ranking
公开(公告)号：US11736019B2
公开(公告)日：2023-08-22
申请号：US17472913
申请日：2021-09-13
Applicant: DENSO CORPORATION
Inventor： Shigeki Otsuka , Naoto Kikuchi
CPC classification number: H02M3/1588 , H02M1/0025 , H02M1/38 , H02M3/157
Abstract: A signal generation circuit includes: a capacitor charged and discharged by a current proportional to an input voltage; a switch controlling charging and discharging of the capacitor based on an output signal of a comparator that compares a feedback voltage according to an output voltage and a predetermined first reference voltage; a reference voltage generation unit generating a second reference voltage that is generated by adding an offset voltage proportional to the input voltage to an output proportional voltage proportional to the output voltage; and a comparator comparing a terminal voltage of the capacitor and the second reference voltage, and generates an ON-time signal based on an output signal of the comparator.
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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：US11562215B2
公开(公告)日：2023-01-24
申请号：US16589415
申请日：2019-10-01
Applicant: DENSO CORPORATION
Inventor： Irina Kataeva , Shigeki Otsuka
Abstract: An artificial neural network circuit includes a crossbar circuit, and a processing circuit. The crossbar circuit transmits a signal between layered neurons of an artificial neural network. The crossbar circuit includes input bars, output bars arranged intersecting the input bars, and memristors. The processing circuit calculates a sum of signals flowing into each of the output bars. The processing circuit calculates, as the sum of the signals, a sum of signals flowing into a plurality of separate output bars and conductance values of the corresponding memristors are set so as to cooperate to give a desired weight to the signal to be transmitted.
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公开(公告)号：US11487992B2
公开(公告)日：2022-11-01
申请号：US16561207
申请日：2019-09-05
Applicant: DENSO CORPORATION
Inventor： Shigeki Otsuka , Irina Kataeva
Abstract: A neural network circuit that uses a ramp function as an activation function includes a memory device in which memristors serving as memory elements are connected in a matrix. The neural network circuit further includes I-V conversion amplification circuits for converting currents flowing via the memory elements into voltages, a differential amplifier circuit for performing a differential operation on outputs of two I-V conversion amplification circuits, an A-D converter for performing an A-D conversion on a result of the differential operation, and an output determine that, by referring to input signals of the differential amplifier circuit, determines whether an output signal value of the differential amplifier circuit belongs to an active region or an inactive region. Based on a determination result, the input determiner switches over the differential amplifier circuit and the A-D converter between an operating state and a standby state.
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公开(公告)号：US11423294B2
公开(公告)日：2022-08-23
申请号：US16449932
申请日：2019-06-24
Applicant: DENSO CORPORATION
Inventor： Shigeki Otsuka
Abstract: A neural network circuit includes: multiple storage portions that include a memristor; multiple D/A converters that receive data, causing a signal voltage to be applied to multiple voltage input terminals of the storage portions; multiple drive amplifiers that are connected between to the D/A converters and the voltage input terminals; multiple I/V conversion amplifiers that are connected to at least one current output terminal of the storage portions; multiple A/D converters; and a series circuit of a first switch and a second switch that is disposed in a feedback loop of each of the drive amplifiers; and a series circuit of a third switch and a fourth switch that is disposed in a feedback loop of each of the I/V conversion amplifiers.
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