EMI energy absorber
AssigneeHitachi America, Ltd.
InventorsGeorge Saikalis, Shigeru Oho
Life of this patent
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Abstract
An EMI energy absorber for use with an electrical circuit, such as a hot wire air flow sensor, which has at least one electrical element which exhibits antenna characteristics at a predetermined frequency range for the EMI. The energy absorber includes a component, such as a ferrite bead, which is electrically connected in series with the element of the electrical circuit. This component exhibits a resistance which varies as a function of frequency and has a maximum resistance within the predetermined frequency range. Thus, the component functions to absorb the EMI and dissipate the EMI as heat.
Claims8
An EMI energy absorber for use with an electrical circuit and at least one electrical element which exhibits antenna characteristics at a predetermined frequency range for the EMI comprising:
- a component electrically connected in series between said at least one electrical element and the electrical circuit, said component exhibiting a resistance which varies as a function of frequency, said component having a maximum resistance at an intermediate frequency within said predetermined frequency range.
An EMI energy absorber for use with an air flow sensor circuit and at least one electrical element which exhibits antenna characteristics at a predetermined frequency range for the EMI comprising:
- a component electrically connected in series between said at least one electrical element and the air flow sensor circuit, said component exhibiting a resistance which varies as a function of frequency, said component having a maximum resistance within said predetermined frequency range.
Dependencies are inferred from the claim text.