Patent ID: 9490766
Filing Date: 2016-11-08
CPC Classification: H03H,H05K

Claim Text:
1. An electromagnetic interference noise filter, comprising: a first stage filter circuit; a second stage filter circuit connected to an output of the first stage filter circuit; a conductive base plate, wherein both a circuit board of the first stage filter circuit and a circuit board of the second stage filter circuit are mounted on the conductive base plate, and wherein a thickness of the conductive base plate is selected to distribute heat within the electromagnetic interference noise filter and to limit thermal gradients in the conductive base plate; one or more conductive partitions separating the circuit board of the first stage filter circuit from the circuit board of the second stage filter circuit, wherein the output of the first stage filter circuit passes through the one or more conductive partitions to the second stage filter circuit; and an outer signal exclusion enclosure containing the first stage filter circuit, the second stage filter circuit, the conductive base plate, and the one or more conductive partitions, wherein a first signal exclusion enclosure containing the first stage filter circuit and a second signal exclusion enclosure containing the second stage filter circuit are formed by the outer signal exclusion enclosure, the one or more conductive partitions, and the conductive baseplate.