Invention Grant
- Patent Title: Analogue signal paths
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Application No.: US15992847Application Date: 2018-05-30
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Publication No.: US10554189B2Publication Date: 2020-02-04
- Inventor: John Paul Lesso , Seyed Hamed Sadati , Yu Tamura
- Applicant: Cirrus Logic International Semiconductor Ltd.
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agency: Jackson Walker L.L.P.
- Priority: GB1711162.6 20170711; GB1721539.3 20171221
- Main IPC: H03G3/30
- IPC: H03G3/30 ; H03G3/32 ; H04R3/00

Abstract:
This application relates to audio circuits, such as audio driving circuits, with improved audio performance. An audio arrangement (200) has an audio circuit (201) with a forward signal path between an input (102) for an input digital audio signal (DIN) and an output (103) for an output analogue audio signal (AOUT). The circuit also has a feedback path comprising an analogue-to-digital conversion module (202) for receiving an analogue feedback signal (VFB) derived from the output analogue audio signal and outputting a corresponding digital feedback signal (DFB). The analogue-to-digital conversion module (202) has an ADC (108), an analogue gain element (203) configured to apply analogue gain (GA) to the analogue feedback signal before the ADC and a digital gain element (204) for applying digital gain (GD) to a signal output from the ADC. A gain controller (205) controls the analogue gain and the digital gain applied based on the input digital audio signal (DIN).
Public/Granted literature
- US20180351523A1 ANALOGUE SIGNAL PATHS Public/Granted day:2018-12-06
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