公开(公告)号：US20210044293A1

公开(公告)日：2021-02-11

申请号：US16977940

申请日：2018-12-26

Applicant: Hitachi High-Tech Corporation

Inventor： Yuki Nakamura ,  Takuma Nishimoto ,  Hiroshi Touda ,  Isao Furuya ,  Suguru Kondo

IPC: H03K17/687 ,  H01J49/02

Abstract: A positive high voltage, a first terminal of a semiconductor element, and a first terminal of a first resistance element are connected to a first terminal of a first current controller. A current input terminal of a first active element is connected to a second terminal of the first current controller, and a second terminal of the semiconductor element and a second terminal of the first resistance element are connected to a control terminal of the first active element. A second resistance element is connected between a current output terminal and a control terminal of the first active element. The first current controller allows a drive current corresponding to an input signal to flow in the first active element and allows the drive current output from the first active element to flow into a load, thereby generating an output voltage.

公开(公告)号：US12066582B2

公开(公告)日：2024-08-20

申请号：US18290019

申请日：2022-06-20

Applicant: HITACHI HIGH-TECH CORPORATION

Inventor： Takuma Nishimoto ,  Isao Furuya ,  Suguru Kondo

IPC: G01T1/20 ,  G01T1/208 ,  H01J49/02 ,  H01J49/26

CPC classification number: G01T1/208 ,  H01J49/025 ,  H01J49/26

Abstract: A signal detection device including: detection equipment including a photoelectric conversion element configured to convert a photon as a detection target into a current signal, and a current-voltage converter configured to convert the current signal into a voltage signal; a transmission unit configured to transmit the voltage signal; and a data collection unit configured to detect and collect the transmitted voltage signal. Here, the detection equipment is disposed inside a first shield case connected to a frame ground. The current-voltage converter includes a differential amplifier having first and second input terminals, the first input terminal is connected to a first output terminal of the photoelectric conversion element via a first input resistor, the second input terminal is connected to a second output terminal of the photoelectric conversion element and a ground via a second input resistor having a resistance value larger than that of the first input resistor.

公开(公告)号：US20240105436A1

公开(公告)日：2024-03-28

申请号：US17768934

申请日：2020-09-04

Applicant: Hitachi High-Tech Corporation

Inventor： Zihao Ong ,  Takuma Nishimoto ,  Isao Furuya ,  Hiroshi Touda

IPC: H01J49/02

CPC classification number: H01J49/022 ,  H02M3/24

Abstract: The performance of a power supply module is to be improved. The occurrence of discharge in the power supply module is to be prevented, and the size of the power supply module is to be reduced. In a power supply module, substrates are provided being stacked in a planar view. A low voltage circuit and a high voltage circuit are formed on a first substrate such that a distance is kept for preventing surface discharge, and a low voltage circuit is formed on a second substrate. A distance between a component of a high voltage alternating current circuit on the high voltage circuit and a component of the low voltage circuit is three times a shortest distance, at which space discharge does not occurs, between a component that constitutes a high voltage direct current circuit on the high voltage circuit and a component that constitutes the low voltage circuit.

公开(公告)号：US11349476B2

公开(公告)日：2022-05-31

申请号：US16977940

申请日：2018-12-26

Applicant: Hitachi High-Tech Corporation

Inventor： Yuki Nakamura ,  Takuma Nishimoto ,  Hiroshi Touda ,  Isao Furuya ,  Suguru Kondo

IPC: H03K17/687 ,  H01J49/02

Abstract: A positive high voltage, a first terminal of a semiconductor element, and a first terminal of a first resistance element are connected to a first terminal of a first current controller. A current input terminal of a first active element is connected to a second terminal of the first current controller, and a second terminal of the semiconductor element and a second terminal of the first resistance element are connected to a control terminal of the first active element. A second resistance element is connected between a current output terminal and a control terminal of the first active element. The first current controller allows a drive current corresponding to an input signal to flow in the first active element and allows the drive current output from the first active element to flow into a load, thereby generating an output voltage.

公开(公告)号：US12224168B2

公开(公告)日：2025-02-11

申请号：US17795355

申请日：2020-12-02

Applicant: Hitachi High-Tech Corporation

Inventor： Takuma Nishimoto ,  Zihao Ong ,  Isao Furuya ,  Hiroshi Touda ,  Yuichiro Hashimoto ,  Masuyuki Sugiyama

IPC: H01J49/00

Abstract: In a mass spectrometer, due to impurities accumulated inside a frame, a withstand voltage may decrease, and electric discharge may occur in an ion source, thereby making it impossible to perform normal measurement. Since a result of abnormality measurement due to the electric discharge cannot be distinguished from measurement abnormality caused by clogging of a tube between a pretreatment unit and a needle, there is a problem in that time is required to identify abnormal portions, and a maintenance property is lowered. As a unit for solving the problem, a return current detection unit connected in series between the frame and an ion source power supply that applies a voltage to the needle and a return current detection unit connected in series between the frame and a counter electrode power supply that applies a voltage to a counter electrode are provided.

公开(公告)号：US12051581B2

公开(公告)日：2024-07-30

申请号：US17768934

申请日：2020-09-04

Applicant: Hitachi High-Tech Corporation

Inventor： Zihao Ong ,  Takuma Nishimoto ,  Isao Furuya ,  Hiroshi Touda

IPC: H01J49/02 ,  H02M3/24

CPC classification number: H01J49/022 ,  H02M3/24

Abstract: The performance of a power supply module is to be improved. The occurrence of discharge in the power supply module is to be prevented, and the size of the power supply module is to be reduced. In a power supply module, substrates are provided being stacked in a planar view. A low voltage circuit and a high voltage circuit are formed on a first substrate such that a distance is kept for preventing surface discharge, and a low voltage circuit is formed on a second substrate. A distance between a component of a high voltage alternating current circuit on the high voltage circuit and a component of the low voltage circuit is three times a shortest distance, at which space discharge does not occurs, between a component that constitutes a high voltage direct current circuit on the high voltage circuit and a component that constitutes the low voltage circuit.