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:
Feb. 07, 2023
Filed:
Sep. 08, 2021
City University of Hong Kong, Hong Kong, HK;
Kun Zhang, Hong Kong, HK;
Shu Hung Henry Chung, Hong Kong, HK;
City University of Hong Kong, Hong Kong, HK;
Abstract
An active common mode filter is configured to be positioned between a power supply and a switching converter-device/load for reducing common mode noise. The active common mode filter includes an active capacitor that has a sensing stage including one or more sensing capacitors, an amplifying stage including a common collector amplifier for mitigating an input voltage divider effect coupled to a common emitter amplifier for providing high gain, and an injection stage including one or more injection capacitors. Depending on the required attenuation in different applications, a multistage active common mode filter may be formed with a necessary number of stages, each stage including an active capacitor and an inductor.