公开(公告)号：US20210041508A1

公开(公告)日：2021-02-11

申请号：US17079653

申请日：2020-10-26

Applicant: DENSO CORPORATION

Inventor： Hirokazu SADAMATSU ,  Shinichiro NAKATA ,  Makoto OISHI

IPC: G01R31/52 ,  H03F3/45 ,  H03M1/64

Abstract: A resolver signal processing circuit for amplifying two phase signals output from a resolver includes first and second amplifier circuits configured to adjust an input in-phase voltage range to output an intended voltage even when a short-circuit arises in the resolver. The resolver signal processing circuit further includes first and second short-circuit detection circuits configured to detect the short-circuit arising in the resolver and short-circuits in first and second signal input paths from the resolver to the first and the second amplifier circuits, respectively, and first and second voltage adjusting units configured to adjust input in-phase voltage ranges of the first and second amplifier circuits when the first and second short-circuit detection circuits detect short-circuits, respectively. The first and second amplifier circuits are configured to adjust the input in-phase voltage ranges, respectively.

公开(公告)号：US20160233800A1

公开(公告)日：2016-08-11

申请号：US15016923

申请日：2016-02-05

Applicant: DENSO CORPORATION

Inventor： Junichi FUKUTA ,  Koichi NISHIBATA ,  Hiroya TSUJI ,  Yusuke SHINDO ,  Shinichiro NAKATA ,  Yasutaka SENDA

IPC: H02P6/12 ,  H02P6/14

CPC classification number: H02P6/16 ,  H02P29/028 ,  H02P29/032

Abstract: In an integrated circuit formed into a single chip, a drive signal generating unit generates drive signals for switching elements of a power conversion circuit. A monitoring unit monitors a microcomputer that calculates generation information that is information used to generate the drive signals, and determines whether or not an abnormality has occurred in the microcomputer. An angle converting unit converts an output signal of an angle sensor to rotation angle information of a rotating electric machine. A drive signal generating unit generates the drive signals for controlling driving of the rotating electric machine based on the generation information and the rotation angle information when the monitoring unit determines that an abnormality has not occurred in the microcomputer, and generates the drive signals based on the rotation angle information, without using the generation information, when the monitoring unit determines that an abnormality has occurred in the microcomputer.

Abstract translation: 在形成为单个芯片的集成电路中，驱动信号生成部生成用于电力转换电路的开关元件的驱动信号。 监视单元监视计算生成信息的微计算机，该生成信息是用于生成驱动信号的信息，并且确定微计算机中是否发生异常。 角度转换单元将角度传感器的输出信号转换为旋转电机的旋转角度信息。 驱动信号发生单元，当监视单元判断为在微型计算机中没有发生异常时，基于生成信息和旋转角度信息，生成用于控制旋转电机的驱动的驱动信号，并且基于 旋转角度信息，而不使用生成信息，当监视单元确定微计算机中已经发生异常时。

公开(公告)号：US20210028786A1

公开(公告)日：2021-01-28

申请号：US17070172

申请日：2020-10-14

Applicant: DENSO CORPORATION

Inventor： Shinichiro NAKATA

IPC: H03K19/0185 ,  H03K19/003

Abstract: A semiconductor integrated circuit device includes digital output terminals and output circuits. Each output circuit includes a switch, and applies a potential, which corresponds to either one of binary logic levels, to corresponding one of the digital output terminals through the switch. An indefinite range is interposed between one of the binary logic levels and the other one of the binary logic levels. The output circuits respectively include potential fixers. Each potential fixer has an identical circuit arrangement, and the potential fixer fixes a potential applied to the digital output terminals through the switch to a potential corresponding to either one of the binary logic levels apart from the indefinite range, in response to that a short circuit occurs between the digital output terminals.

公开(公告)号：US20190146547A1

公开(公告)日：2019-05-16

申请号：US16244174

申请日：2019-01-10

Applicant: DENSO CORPORATION

Inventor： Shinichiro NAKATA

IPC: G06F1/06 ,  H03K5/133 ,  G06F1/26 ,  G06F11/30 ,  G06F11/34

Abstract: A semiconductor integrated circuit device comprises a first oscillation circuit which is supplied with an external DC power and generates a first clock, a power supply circuit which is supplied with the external DC power and outputs a DC voltage by a switching operation based on the first clock, a second oscillation circuit which generates a second clock, a load circuit which is supplied with the output DC voltage and operates based on the second clock, a monitor which monitors an operation of the first oscillation circuit based on the second clock under a state that the first and second oscillation circuits are in operation, and a switch circuit which switches to supply the power supply circuit with the second clock in place of the first clock when the monitor circuit detects a failure of the first oscillation circuit.

公开(公告)号：US20170207699A1

公开(公告)日：2017-07-20

申请号：US15289287

申请日：2016-10-10

Applicant: DENSO CORPORATION

Inventor： Shinichiro NAKATA

IPC: H02M3/156 ,  H02M1/32 ,  H02M1/08

CPC classification number: H02M3/156 ,  H02M1/08 ,  H02M1/32 ,  H02M3/158 ,  H02M2001/0009

Abstract: A switching power supply device includes a switching element and a diode and generates an output voltage by supplying current to a coil by controlling the switching element to turn on and off. A current detection circuit detects a current flowing in the switching element. A voltage detection circuit monitors a voltage at an output terminal OUT. A control circuit controls the switching element to turn on and off by a current control mode based on a current detection signal and a feedback voltage. The control circuit drives a bleeder circuit to supply a load current to the output terminal when a level of the current detection signal is lower than a predetermined level.