US Patent Issued to SANDEN on Dec. 16 for "Active filter device and electric compressor comprising same" (Japanese Inventors)

ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,500,574, issued on Dec. 16, was assigned to SANDEN Corp. (Gunma, Japan).

"Active filter device and electric compressor comprising same" was invented by Hiroshi Yoshida (Isesaki, Japan), Koji Kobayashi (Isesaki, Japan) and Tatsuki Kashihara (Isesaki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an active filter device capable of effectively reducing common mode noise and differential mode noise and optimizing filter characteristics. The active filter device includes an inverting amplifier circuit 37 that inverts and amplifies a common mode voltage and a differential amplifier circuit 64 that differentially amplifies a differential mod...