CPC H05K 1/0216 (2013.01) [H05K 5/0026 (2013.01)] | 8 Claims |
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.
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