公开(公告)号：US20240258897A1

公开(公告)日：2024-08-01

申请号：US18429141

申请日：2024-01-31

Applicant: National University Corporation Tokai National Higher Education and Research System ,  KOA CORPORATION

Inventor： Yu YONEZAWA ,  Masayoshi YAMAMOTO ,  Atsushi HASENUMA ,  Koji SHIGESAWA ,  Keishi NAKAMURA ,  Susumu TOYODA

IPC: H02M1/00 ,  H02M7/5387 ,  H03F3/45

CPC classification number: H02M1/0009 ,  H02M7/53873 ,  H03F3/45475 ,  H03F2200/261 ,  H03F2200/462

Abstract: A current detection circuit, including: an output circuit to output a signal indicating a voltage drop between a pair of detection terminals; an amplifier circuit to amplify the signal from the output circuit; an AD conversion circuit to generate a digital signal by sampling, at a predetermined cycle, an amplified signal amplified by the amplifier circuit; a filter circuit configured to extract, from the amplified signal amplified by the amplifier circuit, a noise component having a frequency higher than a sampling frequency of the AD conversion circuit; a comparing unit to output a comparison signal indicating a noise detection timing at which an output signal of the filter circuit exceeds a predetermined reference value for detecting the noise component; and an arithmetic circuit to delay a timing at which the amplified signal is sampled by the AD conversion circuit for a predetermined time based on the comparison signal.

公开(公告)号：US20230140922A1

公开(公告)日：2023-05-11

申请号：US17916641

申请日：2021-04-01

Applicant: KOA CORPORATION

Inventor： Susumu TOYODA ,  Keishi NAKAMURA ,  Shuhei MATSUBARA

IPC: G01R1/20 ,  H01C17/00 ,  H01C1/142

CPC classification number: G01R1/203 ,  H01C17/006 ,  H01C1/142

Abstract: The mounting area for an electronic component and a resistor for current detection is reduced. A current detection resistor for detecting current includes a plate-like resistive body, and a first electrode and an opposite second electrode which are stacked in a thickness direction of the resistive body and are disposed so as to sandwich the resistive body. The first electrode has a groove portion.

公开(公告)号：US20200233015A1

公开(公告)日：2020-07-23

申请号：US16635256

申请日：2018-07-10

Applicant: KOA CORPORATION

Inventor： Takanori KIKUCHI ,  Keishi NAKAMURA ,  Susumu TOYODA

IPC: G01R1/20 ,  G01R19/00

Abstract: Provided is a current measuring apparatus including a current measuring resistor that includes a resistive element and first and second electrodes fixed to the resistive element, the current measuring resistor being adapted to measure a current, and an electronic circuit component including a plurality of terminals. One of the first electrode or the second electrode is used to short at least two of the terminals of the electronic circuit component.

公开(公告)号：US20200051717A1

公开(公告)日：2020-02-13

申请号：US16497220

申请日：2018-02-28

Applicant: KOA CORPORATION

Inventor： KEISHI NAKAMURA ,  Kenichi IGUCH! ,  Susumu TOYODA ,  Sonho TODO

IPC: H01C1/14 ,  H01L25/16 ,  H01L23/495 ,  H01L23/64 ,  H01C1/01 ,  G01R1/20

Abstract: A current sensing resistor including: a first terminal and a second terminal which are made from an electrically conductive metal material; and a resistive element disposed between the first terminal and the second terminal. The resistive element, the first terminal, and the second terminal constitute a laminate in a thickness direction. The laminate has a size less than or equal to 5 mm.

公开(公告)号：US20240328870A1

公开(公告)日：2024-10-03

申请号：US18573823

申请日：2022-05-30

Applicant: KOA CORPORATION

Inventor： Susumu TOYODA ,  Keishi NAKAMURA

IPC: G01K7/18 ,  H01C7/02 ,  H01C7/22

CPC classification number: G01K7/183 ,  H01C7/02 ,  H01C7/22

Abstract: Provided is a temperature sensor which can enhance strength more easily. The temperature sensor comprises a resin film and a titanium metal foil laminated on the resin film. The titanium metal foil constitutes a conductive pattern. In an example, the titanium metal foil is subjected to a surface modification on a surface facing the resin film. In an example, a thickness of the titanium metal foil is within a range of 3-10 μm. In an example, the resin film contains a thermoplastic resin, and a thickness of the resin film is within a range of 20-80 μm.

公开(公告)号：US20190227104A1

公开(公告)日：2019-07-25

申请号：US16313381

申请日：2017-05-25

Applicant: KOA CORPORATION

Inventor： Keishi NAKAMURA ,  Susumu TOYODA

IPC: G01R19/00

Abstract: A shunt resistor mounting structure comprising: a resistor including a pair of terminal portions and adapted to perform current sensing; and a mounting board. The mounting board includes: a mounting portion including a pair of a first land and a second land to which the pair of terminal portions are respectively connected, and which allow a current to be measured to flow through the resistor; a substrate having the pair of lands formed thereon; a first voltage terminal formed on the substrate and including a line pattern led out from the first land; and a second voltage terminal including a wire connected to the terminal portion corresponding to the second land.