公开(公告)号：US11469753B1

公开(公告)日：2022-10-11

申请号：US17365201

申请日：2021-07-01

Applicant: Cirrus Logic international Semiconductor Ltd.

Inventor： Hamed Sadati ,  Yu Tamura

IPC: H03K17/10 ,  H03F3/185 ,  G11C5/14 ,  H02M3/07 ,  H03K19/00 ,  G05F3/20 ,  G10K11/34

Abstract: A switching driver circuit may have an output stage having an output switch connected between a switching voltage node and an output node. A switch network may control a switching voltage at the switching voltage node so that in one mode the switching voltage node is coupled to a positive voltage and in another mode the switching voltage node is coupled to ground voltage via a first switching path of the switch network. The circuit may also include an n-well switching block operable to, when the first switching voltage node is coupled to a positive voltage, connect the n-well of the first output switch to the switching voltage node, and, when the first switching voltage node is coupled to the ground voltage, connect the n-well of the first output switch to a first ground which is separate to the first switching voltage node and independent of the first switching path.

公开(公告)号：US10554189B2

公开(公告)日：2020-02-04

申请号：US15992847

申请日：2018-05-30

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John Paul Lesso ,  Seyed Hamed Sadati ,  Yu Tamura

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).