公开(公告)号：US20240405772A1

公开(公告)日：2024-12-05

申请号：US18805727

申请日：2024-08-15

Applicant: ROHM CO., LTD.

Inventor： Yosuke YAMANAKA ,  Yuji SHIMADA ,  Koji SAITO

IPC: H03K17/691

Abstract: For example, a pulse transmission circuit includes: a constant current source configured to generate a constant current; a capacitor configured to be charged using the constant current (e.g., a charge current generated by mirroring the constant current); and a discharge switch configured to pass a discharge current from the capacitor to a transformer according to a pulse edge in an input pulse signal, thereby to pulse-drive the transformer.

公开(公告)号：US20240072031A1

公开(公告)日：2024-02-29

申请号：US18500796

申请日：2023-11-02

Applicant: ROHM CO., LTD.

Inventor： Koji SAITO

IPC: H01L25/18 ,  H01L23/495 ,  H01L27/01

CPC classification number: H01L25/18 ,  H01L23/49575 ,  H01L27/01 ,  H01L24/45

Abstract: A signal transmission device provided with an insulated chip. The insulated chip includes: an element insulating layer; and a first insulated element and a second insulated element which are provided in the element insulating layer. The first insulated element includes a first front-surface-side electrically conductive portion and a first back-surface-side electrically conductive portion. The second insulated element includes a second front-surface-side electrically conductive portion and a second back-surface-side electrically conductive portion. The first back-surface-side electrically conductive portion and the second back-surface-side electrically conductive portion are electrically connected to each other. The first front-surface-side electrically conductive portion is electrically connected to a primary-side circuit via the first pad. The second front-surface-side electrically conductive portion is electrically connected to a secondary-side circuit via the second pad.

公开(公告)号：US20240186997A1

公开(公告)日：2024-06-06

申请号：US18525125

申请日：2023-11-30

Applicant: ROHM CO., LTD.

Inventor： Koji SAITO ,  Ryoichi KUROKAWA

IPC: H03K17/687 ,  H03K5/01

CPC classification number: H03K17/6871 ,  H03K5/01

Abstract: A voltage generation circuit includes: a first MOSFET including a source, a back gate, and a gate connected to a first node, and a drain connected to a first potential end; a front-stage transistor circuit including one or more second MOSFETs and connected between the first node and a second potential end; a third MOSFET including a source and a back gate connected to a second node, a gate connected to the first node, and a drain connected to the first potential end; and a rear-stage transistor circuit including one or more fourth MOSFETs and connected between the second node and the second potential end, wherein the first and third MOSFETs each have characteristic of being in a conductive state when gate-source voltage is 0 V, and wherein the second and fourth MOSFETs each have characteristic of being in a cut-off state when gate-source voltage is 0 V.

公开(公告)号：US20230155603A1

公开(公告)日：2023-05-18

申请号：US17986362

申请日：2022-11-14

Applicant: Rohm Co., Ltd.

Inventor： Koji SAITO ,  Ryoichi KUROKAWA

IPC: H03M1/46 ,  H03M1/12

CPC classification number: H03M1/468 ,  H03M1/1255

Abstract: An AD converter includes: a DA converter; a comparator configured to be capable of resetting a comparison output signal to a first level after a comparison operation is performed based on an output of the DA converter and before a next comparison operation is performed; a level shifter configured to be capable of level-shifting and outputting the comparison output signal such that a change from the first level to a second level is faster than a change from the second level to the first level; a register configured to be capable of obtaining the output of the level shifter; and a logic circuit configured to be capable of controlling the DA converter.

公开(公告)号：US20190145826A1

公开(公告)日：2019-05-16

申请号：US16180403

申请日：2018-11-05

Applicant: ROHM CO., LTD.

Inventor： Koji SAITO ,  Takahiro KITAHARA ,  Yoshitsugu UEDAIRA

IPC: G01J3/51 ,  G01J1/44 ,  G01J1/04 ,  H01L27/146

Abstract: An optical sensor includes a light receiving unit and a calculating unit. The light receiving unit includes a plurality of light receiving elements and a plurality of color filters. The plurality of light receiving elements include a first light receiving element and a second light receiving element through which a photocurrent flows when receiving light. The plurality of color filters include a yellow filter that covers a light receiving surface of the first light receiving element and a red filter that covers a light receiving surface of the second light receiving element. The calculating unit calculates an intensity of a yellow wavelength band based on a difference between a first output signal obtained from the photocurrent of the first light receiving element and a second output signal obtained from the photocurrent of the second light receiving element.

公开(公告)号：US20170205447A1

公开(公告)日：2017-07-20

申请号：US15405372

申请日：2017-01-13

Applicant: ROHM CO., LTD.

Inventor： Koji SAITO

IPC: G01R15/20 ,  G01R19/00 ,  G01R1/30 ,  G01R33/06

CPC classification number: G01R15/20 ,  G01R1/30 ,  G01R19/0092 ,  G01R33/063

Abstract: A current sensor includes first to third magneto-impedance (MI) sensor parts, a first sample/hold part configured to receive a differential input between a first sensor signal generated by the first MI sensor part and a second sensor signal generated by the second MI sensor part to generate a first sample/hold signal, a second sample/hold part configured to receive a third sensor signal generated by the third MI sensor part to generate a second sample/hold signal, first and second amplifier parts configured to amplify the first and second sample/hold signals with first and second gains to generate first and second amplified signals, respectively, a subtraction part configured to subtract the second amplified signal from the first amplified signal to generate an output signal, and a gain adjusting part configured to adjust the first and second gains to correct a difference in sensitivity of the first and second MI sensor parts.