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:
Dec. 08, 2020
Filed:
Dec. 04, 2017
Applicant:
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
Inventors:
Assignee:
Cirrus Logic, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 23/00 (2006.01); H04B 1/04 (2006.01); H04B 11/00 (2006.01); H04R 3/04 (2006.01); H03G 3/20 (2006.01); H03G 3/00 (2006.01); G01S 7/52 (2006.01); G01S 7/524 (2006.01); G01S 15/10 (2006.01);
U.S. Cl.
CPC ...
H04R 23/00 (2013.01); G01S 7/52004 (2013.01); G01S 7/524 (2013.01); G01S 15/10 (2013.01); H03G 3/005 (2013.01); H03G 3/20 (2013.01); H04B 1/04 (2013.01); H04B 11/00 (2013.01); H04R 3/04 (2013.01); H04R 2420/01 (2013.01); H04R 2499/11 (2013.01);
Abstract
Driver circuitry is disclosed for driving an electroacoustic transducer to provide an output comprising both ultrasonic and audio signal components. The driver circuitry comprises an adjustment module configured to reduce the level of said ultrasonic component signal in response to an increase in an operational variable indicative of a level of said audio signal component, while also increasing the pulse duration, duty cycle, repetition frequency or frequency span or bandwidth of the ultrasonic component.