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. 13, 2023
Filed:
Nov. 08, 2021
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
Leyi Yin, Austin, TX (US);
John L. Melanson, Austin, TX (US);
Eric Lindemann, Boulder, CO (US);
Amar Vellanki, Cedar Park, TX (US);
Jianhao Chen, Austin, TX (US);
Venugopal Choukinishi, Austin, TX (US);
Wai-Shun Shum, Austin, TX (US);
Xiaofan Fei, Austin, TX (US);
CIRRUS LOGIC, INC., Austin, TX (US);
Abstract
A multi-path audio amplification system that provides an output drive signal to electromechanical output transducers provides improved undistorted headroom, reduced path switching noise, and/or improved frequency response performance. Multiple signal amplification paths receive an audio input signal and have corresponding multiple output stages that have differing output impedances. A mode selector selects an active one of the multiple signal amplification paths is selected to supply the output drive signal. Outputs of the multiple output stages are coupled to the electromechanical transducer to provide the output drive signal and at least one of the multiple signal amplification paths includes an equalization filter for filtering the audio input signal to compensate for phase or gain differences referenced from the input to the outputs of the multiple output stages due to interaction between the differing output impedances and an impedance of the electromechanical transducer.