Electromagnetic interference (EMI) diverter
AssigneeHoneywell International Inc.
InventorJohn Kenneth Tillotson
Life of this patent
Estimating the term…
Abstract
An external EMI diverting structure to electrically shield an electronic device from EMI is presented. The electronic device is physically isolated from the case ground which interrupts the EMI or lightning fault path. This shield provides a return path to ground for the EMI away from the electronic device and replaces conventional EMI filter capacitors, which are not connected to case ground. The external EMI diverter comprises a first conducting enclosure enclosing the electrical circuit and is electrically coupled to the electric circuit and a second conducting enclosure enclosing the first conducting enclosure and being electrically isolated from the first conducting enclosure and the electric circuit. The diverter is physically and electrically connected to the case ground at an attachment point.
Claims14
An external electromagnetic interference (EMI) diverter to protect an electric circuit, comprising:
- a first conducting enclosure enclosing the electrical circuit and being electrically coupled to a circuit board including the electric circuit, the first conducting enclosure having an inside surface and an outside surface;
- a second conducting enclosure enclosing the first conducting enclosure and being electrically isolated from the first conducting enclosure and the electric circuit, wherein the first conducting enclosure is capacitatively coupled to the second conducting enclosure;
- and
- an attachment point configured for connecting the second conducting enclosure to ground.
An external electromagnetic interference (EMI) diverter to protect an electric circuit, comprising:
- means for enclosing the electrical circuit;
- means for enclosing the means for enclosing the electrical circuit, the means for enclosing the means for enclosing the electrical circuit being electrically isolated from the electric circuit and from the means for enclosing the electrical circuit, wherein the means for enclosing the means for enclosing the electrical circuit is capacitatively coupled to the means for enclosing the electrical circuit;
- and
- means for connecting the means for enclosing the means for enclosing the electrical circuit to ground.
Dependencies are inferred from the claim text.