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:
Feb. 04, 2020
Filed:
May. 30, 2018
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
Cirrus Logic, Inc., Austin, TX (US);
Abstract
This application relates to audio circuits, such as audio driving circuits, with improved audio performance. An audio arrangement () has an audio circuit () with a forward signal path between an input () for an input digital audio signal (D) and an output () for an output analogue audio signal (A). The circuit also has a feedback path comprising an analogue-to-digital conversion module () for receiving an analogue feedback signal (V) derived from the output analogue audio signal and outputting a corresponding digital feedback signal (D). The analogue-to-digital conversion module () has an ADC (), an analogue gain element () configured to apply analogue gain (G) to the analogue feedback signal before the ADC and a digital gain element () for applying digital gain (G) to a signal output from the ADC. A gain controller () controls the analogue gain and the digital gain applied based on the input digital audio signal (D).