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:
Aug. 19, 2025
Filed:
Dec. 12, 2022
Hamilton Sundstrand Corporation, Charlotte, NC (US);
Jaspreet Kaur Mann, Birmingham, GB;
Mark A. Thomas, Solihull, GB;
HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US);
Abstract
A damping filter network includes a damping filter having a damping filter resistor and a damping filter capacitor connected in series and a tone decoder having an input arranged to be connected to a system input and an output connected to a damping switch. The tone decoder has a pass-band between a lower frequency threshold and an upper frequency threshold, the damping filter resistor and the damping filter capacitor selected to perform damping at frequencies within the pass-band; wherein the tone decoder is configured to detect the frequency of the system input voltage and to close the switch so as to connect the damping filter to ground when the frequency is within the tone decoder pass-band and to open the switch to disconnect the damping filter from ground when the frequency is outside the pass-band.