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:
Jun. 18, 2019
Filed:
Sep. 23, 2015
Stmicroelectronics S.r.l., Agrate Brianza, IT;
Stmicroelectronics (Shenzhen) R&d Co. Ltd, Shenzhen, CN;
Luca Molinari, Piacenza, IT;
Xi Chun Ma, Shenzhen, CN;
Sandro Dalle Feste, Novaro, IT;
Martino Zerbini, Abbiategrasso, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
STMicroelectronics (Shenzhen) R&D Co. Ltd, Shenzhen, CN;
Abstract
An active noise cancelling device including a sensor configured to convert acoustic signals into first audio signals and a speaker acoustically coupled to the sensor A control stage is configured to control the speaker based on the first audio signals to cause the speaker to produce cancelling acoustic waves that tend to suppress acoustic noise components in the acoustic signals. The control stage includes sigma-delta modulator digital filters.