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. 25, 2019
Filed:
Apr. 27, 2018
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
Cedric Andrieu, Edinburgh, GB;
Cirrus Logic, Inc., Austin, TX (US);
Abstract
A loudspeaker driver circuit, comprises: at least one input for receiving an input signal; a loudspeaker protection module coupled to the input for receiving the input signal and for generating a modified signal in response to the input signal; an amplifier coupled to receive the modified signal from the loudspeaker protection module and to generate an output signal; an output for outputting the output signal for driving a speaker; and an ultrasonic signal generator, for generating an ultrasonic signal, wherein the ultrasonic signal generator is coupled to the amplifier for applying the ultrasonic signal thereto.