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. 16, 2021
Filed:
Aug. 13, 2019
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
Viral Parikh, Austin, TX (US);
Jon D. Hendrix, Wimberley, TX (US);
Jeffrey D. Alderson, Austin, TX (US);
Vitaliy Sapozhnykov, Victoria, AU;
Nafiseh Erfanian Saeedi, Victoria, AU;
Thomas I. Harvey, Victoria, AU;
Robert Luke, Victoria, AU;
Cirrus Logic, Inc., Austin, TX (US);
Abstract
An integrated circuit for implementing at least a portion of a personal audio device may include an output for providing an output signal to a transducer, wherein the output signal includes a pilot signal, a microphone input for receiving a microphone signal from a microphone indicative of an output of the transducer, and a processing circuit. The processing circuit may be configured to implement a pilot signal control to apply an adjustment to the pilot signal as necessary to maintain the pilot signal at a substantially constant magnitude regardless of proximity of the transducer to a pinna and implement a proximity determination block configured to determine proximity of the transducer to the pinna based on the adjustment.