The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2019
Filed:
Apr. 11, 2017
Nxp B.v., Eindhoven, NL;
Marcel Wilhelm Rudolf Martin van Roosmalen, Wijchen, NL;
Petrus Cornelis Theodorus Laro, Wijchen, NL;
Humphrey de Groot, Vlijmen, NL;
Bobby Jacob Daniel, Eindhoven, NL;
Arjan van den Berg, Helmond, NL;
Dirk Wouter Johannes Groeneveld, Elst, NL;
NXP B.V., Eindhoven, NL;
Abstract
A switch mode power supply is described including a primary side for coupling to a mains supply and a secondary side for coupling to a device, an isolation transformer comprising a primary coil and a secondary coil and arranged to isolate the primary side from the secondary side, and a noise filter coupled between a primary ground at the primary side and a secondary ground at the secondary side, the noise filter having a conductance value that varies with frequency. The noise filter conductance comprises a peak conductance in a peak conductance frequency region. The noise filter is operable to reduce the common-mode noise of the switch mode power supply at frequencies occurring in the peak conductance frequency region.