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公开(公告)号：US12245384B2
公开(公告)日：2025-03-04
申请号：US17622174
申请日：2020-05-13
Applicant: HITACHI ASTEMO, LTD.
Inventor： Yuki Nakamura , Masahiro Toyama , Isao Hoda , Hiroki Funato , Umberto Paoletti , Hideyuki Sakamoto , Yutaka Uematsu
Abstract: A signal transmission circuit includes: a circuit board stored in a housing; a connector which is mounted on the circuit board and includes a first signal terminal and a first ground terminal; and an integrated circuit which is mounted on the circuit board and includes a second signal terminal and a second ground terminal. The first signal terminal and the second signal terminal are connected to each other by a signal wiring arranged on the circuit board. The first around terminal and the second ground terminal are connected to each other by a ground wiring arranged in a predetermined range including a portion immediately above or immediately below the signal wiring in the circuit board. At least a part of the ground wiring immediately above or immediately below the signal wiring has a high impedance structure formed to be wider than the signal wiring and narrower than a combined width of the first signal terminal and the first ground terminal.
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公开(公告)号：US12088211B2
公开(公告)日：2024-09-10
申请号：US17622565
申请日：2020-04-20
Applicant: HITACHI ASTEMO, LTD.
Inventor： Isao Houda , Hiroki Funato , Yuta Numakura , Yoichiro Furuta
CPC classification number: H02M7/003 , H05K7/1427 , H02M7/48
Abstract: A power conversion device including: a circuit board including a first ground constituting a ground of a first circuit and a second ground formed to be electrically separated from the first ground; a second circuit in which a joining portion is formed; a metal base plate provided between the second circuit and the circuit board and provided with an opening portion corresponding to the joining portion; and a housing that stores the circuit board, the second circuit, and the metal base plate and is electrically connected to the second ground of the circuit board and the metal base plate, in which the joining portion of the second circuit is disposed corresponding to the second ground via the opening portion of the metal base plate.
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公开(公告)号：US12058822B2
公开(公告)日：2024-08-06
申请号：US17787852
申请日：2020-11-24
Applicant: HITACHI ASTEMO, LTD.
Inventor： Yuki Nakamura , Masahiro Toyama , Hiroki Funato , Hideyuki Sakamoto , Shinya Kawakita
CPC classification number: H05K5/0047 , H01L23/66 , H05K1/025 , H05K5/0073 , H05K9/0009
Abstract: An electronic control device including a circuit substrate having a signal wiring and a ground wiring; at least one connector having a signal conductor and a ground conductor respectively connected to the signal wiring and the ground wiring of the circuit substrate on one end side and extending on the other end side; a housing including an accommodating portion that accommodates the circuit substrate and the at least one connector, in which a radio wave path through which a leakage electromagnetic wave propagates from one end on the circuit substrate side toward the other end on the side opposite to the circuit substrate side of the at least one connector is formed in an internal space at the periphery of the at least one connector; and a leakage electromagnetic wave attenuating structure provided between the housing and the at least one connector; where the leakage electromagnetic wave attenuating structure includes a plurality of conductors that are arrayed along a direction in which the leakage electromagnetic wave propagates from the one end of the at least one connector, and attenuate the leakage electromagnetic wave propagating through the radio wave path.
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