US Patent No. 10,219,394

RADIATED IMMUNITY USING EMC CLIPS CONNECTED TO A BOTTOM HOUSING


Patent No. 10,219,394
Issue Date February 26, 2019
Title Radiated Immunity Using Emc Clips Connected To A Bottom Housing
Inventorship Sergio Bantiles, Tuam (IE)
Amit Gupta, Tuam (IE)
Fintan McMorrow, Tuam (IE)
John Grimes, Tuam (IE)
Joseph Estremera, Tuam (IE)
Assignee Connaught Electronics Ltd., Tuam, County Galway (IE)

Claim of US Patent No. 10,219,394

1. An apparatus for a motor vehicle comprising:an engine control unit (ECU) of the motor vehicle; and
an electronic device that comprises:
an electronically conductive housing that comprises a bottom portion of the housing;
a printed circuit board (PCB) that comprises a top layer having circuitry, and a ground layer, wherein the PCB is located in the housing;
an electronic ground component that is electronically connected to the bottom portion of the housing;
at least one leg that extends through the PCB and fixes the PCB to the bottom portion of the housing; and
a plurality of electromagnetic compatibility connectors that directly electronically connect the circuitry on the top layer to the bottom portion of the housing,
wherein, at a noise frequency, when there is a noise current at a given location of the circuitry, a first noise impedance from the given location to the bottom portion of the housing through the plurality of electromagnetic compatibility connectors is less than a second noise impedance from the given location to other locations of the circuitry, and is less than a third noise impedance from the given location to the bottom portion of the housing through the at least one leg,
wherein the electronic ground component is connected to the ECU.