US 12,127,330 B2
Electronic control device
Kiyoharu Ozaki, Hitachinaka (JP); and Toshiaki Takai, Hitachinaka (JP)
Assigned to HITACHI ASTEMO, LTD., Hitachinaka (JP)
Appl. No. 17/783,204
Filed by HITACHI ASTEMO, LTD., Hitachinaka (JP)
PCT Filed Dec. 4, 2020, PCT No. PCT/JP2020/045178
§ 371(c)(1), (2) Date Jun. 7, 2022,
PCT Pub. No. WO2021/131599, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-238070 (JP), filed on Dec. 27, 2019.
Prior Publication US 2023/0017402 A1, Jan. 19, 2023
Int. Cl. H05K 5/00 (2006.01); H05K 1/02 (2006.01)
CPC H05K 1/0216 (2013.01) [H05K 5/0026 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electronic control device which includes a circuit board having signal grounds and frame grounds, a housing accommodating the circuit board, and a connector mounted on the circuit board, the electronic control device comprising:
a first coupling portion which AC-couples the signal ground with the frame ground; and
a second coupling portion which electrically couples the frame ground with the housing, wherein:
the first coupling portion and the second coupling portion are provided between the connector and a noise source on the circuit board;
a protrusion portion protruding toward an inside of the housing is provided in the housing,
a part of the signal grounds and a part of the frame grounds are disposed in a projection region of the protrusion portion in the circuit board with a gap to be separated from the protrusion portion, and
the first coupling portion and the second coupling portion are formed by a single capacitive coupling member provided at least at a part of the gap.