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. 27, 2022
Filed:
Jun. 16, 2021
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
Amar Vellanki, Cedar Park, TX (US);
Xin Zhao, Austin, TX (US);
Jing Bai, Austin, TX (US);
John L. Melanson, Austin, TX (US);
Ku He, Austin, TX (US);
Wai-Shun Shum, Austin, TX (US);
Xiaofan Fei, Austin, TX (US);
Alan M. Morton, Austin, TX (US);
CIRRUS LOGIC, INC., Austin, TX (US);
Abstract
An amplification system with an output driver stage for providing an output signal to acoustic output transducers such as speakers or haptic output devices removes signal distortion caused by output stage non-linearities by pre-distorting an input signal. The system includes the output driver stage, an input stage for receiving the input signal, and a processing block that receives the input signal and provides an output signal to the output driver stage. The processing block includes a pre-distortion circuit that applies a pre-distortion function to the input signal to generate the output signal if a signal level of the input signal is greater than a threshold amplitude, and if the signal level is less than or equal to the threshold amplitude, generates the output signal from the input signal by bypassing the pre-distortion circuit.