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. 30, 2020
Filed:
Jul. 25, 2019
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
John L. Melanson, Austin, TX (US);
Xiaofan Fei, Austin, TX (US);
Lei Zhu, Austin, TX (US);
Xin Zhao, Austin, TX (US);
Wei-Shun Shum, Austin, TX (US);
Leyi Yin, Austin, TX (US);
Ku He, Austin, TX (US);
Johann G. Gaboriau, Austin, TX (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
A system may include a filter configured to receive a digital audio input signal quantized at between two and 257 quantization levels and sampled at at least 500 kilohertz, the filter further configured to perform filtering on the digital audio input signal to generate a filtered digital audio input signal, the filter having a selectable variable group delay, a digital-to-analog converter configured to receive the filtered digital audio input signal and convert the filtered digital audio input signal into an equivalent analog audio input signal, and a driver configured to receive the equivalent analog audio input signal and drive an analog audio output signal to a transducer.