公开(公告)号：US20190245498A1

公开(公告)日：2019-08-08

申请号：US16269289

申请日：2019-02-06

Applicant: STMicroelectronics S.r.l.

Inventor： Edoardo Botti ,  Tommaso Barbieri ,  Davide Luigi Brambilla ,  Cristiano Meroni

IPC: H03F3/217 ,  H03K17/687 ,  H03K3/017 ,  H04R3/00

Abstract: An integrated circuit includes a die that includes a circuit configured to generate a PWM signal in response to a first clock signal, and a first set of pads configured to provide amplified PWM signals to external filters. An amplifier stage is configured to provide the amplified PWM signals. The die includes two pads configured to be coupled to an external inductor, and a second set of pads configured to provide regulated voltages. An electronic converter circuit is configured to generate the regulated voltages to supply the amplifier stage. The electronic converter circuit includes a control circuit configured to drive electronic switches in response to a second clock signal to regulate the regulated voltages to a respective target value. The die includes a control block to synchronize the switching activity of the electronic switches with the switching activity of the amplifier stage.

公开(公告)号：US10050595B2

公开(公告)日：2018-08-14

申请号：US15723622

申请日：2017-10-03

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： XiangSheng Li ,  Cristiano Meroni ,  Mei Yang ,  Xian Feng Xiong

IPC: H03G11/00 ,  H04R3/00 ,  H03G3/34 ,  H03F1/52 ,  H03F3/183 ,  H03F3/21 ,  H04R1/00

Abstract: A circuit can be used in a speaker system. The circuit includes an amplifier with an output configured to be coupled to a speaker. An offset comparator has an input coupled the output of the amplifier and is configured to provide an offset control signal. A digital circuit has a first input coupled to an output of the offset comparator, a second input configured to receive an amplifier control signal, a third input configured to receive a play control signal, and an output configured to provide a forced mute signal that can be used to control the amplifier.

公开(公告)号：US09800221B2

公开(公告)日：2017-10-24

申请号：US15356269

申请日：2016-11-18

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd. ,  STMicroelectronics S.r.l.

Inventor： XiangSheng Li ,  Cristiano Meroni ,  Mei Yang ,  Xian Feng Xiong

IPC: H04R3/00 ,  H03G11/00 ,  H03G3/34 ,  H03F1/52 ,  H03F3/21 ,  H03F3/183 ,  H04R1/00

CPC classification number: H03G3/348 ,  H03F1/52 ,  H03F3/183 ,  H03F3/21 ,  H03F2200/321 ,  H03F2200/375 ,  H03F2200/471 ,  H03F2200/78 ,  H03G11/00 ,  H04R1/00 ,  H04R3/007 ,  H04R2201/028 ,  H04R2499/13

Abstract: A circuit can be used in a speaker system. The circuit includes an amplifier with an output configured to be coupled to a speaker. An offset comparator has an input coupled the output of the amplifier and is configured to provide an offset control signal. A digital circuit has a first input coupled to an output of the offset comparator, a second input configured to receive an amplifier control signal, a third input configured to receive a play control signal, and an output configured to provide a forced mute signal that can be used to control the amplifier.

公开(公告)号：US20170070201A1

公开(公告)日：2017-03-09

申请号：US15356269

申请日：2016-11-18

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd. ,  STMicroelectronics S.r.l.

Inventor： XiangSheng Li ,  Cristiano Meroni ,  Mei Yang ,  Xian Feng Xiong

IPC: H03G3/34 ,  H03F3/21 ,  H03F3/183 ,  H04R3/00

CPC classification number: H03G3/348 ,  H03F1/52 ,  H03F3/183 ,  H03F3/21 ,  H03F2200/321 ,  H03F2200/375 ,  H03F2200/471 ,  H03F2200/78 ,  H03G11/00 ,  H04R1/00 ,  H04R3/007 ,  H04R2201/028 ,  H04R2499/13

Abstract: A circuit can be used in a speaker system. The circuit includes an amplifier with an output configured to be coupled to a speaker. An offset comparator has an input coupled the output of the amplifier and is configured to provide an offset control signal. A digital circuit has a first input coupled to an output of the offset comparator, a second input configured to receive an amplifier control signal, a third input configured to receive a play control signal, and an output configured to provide a forced mute signal that can be used to control the amplifier.

Abstract translation: 电路可用于扬声器系统。 电路包括具有被配置为耦合到扬声器的输出的放大器。 偏移比较器具有耦合放大器的输出的输入，并被配置为提供偏移控制信号。 数字电路具有耦合到偏移比较器的输出的第一输入，被配置为接收放大器控制信号的第二输入，被配置为接收播放控制信号的第三输入和被配置为提供强制静音信号的输出， 用于控制放大器。

公开(公告)号：US09532142B2

公开(公告)日：2016-12-27

申请号：US15158854

申请日：2016-05-19

Applicant: STMicroelectronics (Shenzhen) R&D Co., Ltd. ,  STMicroelectronics S.r.l

Inventor： XiangSheng Li ,  Cristiano Meroni ,  Mei Yang ,  Xian Feng Xiong

IPC: H04R3/00 ,  H03G11/00 ,  H03F1/52 ,  H03G3/34 ,  H03F3/21 ,  H03F3/183 ,  H04R1/00

CPC classification number: H03G3/348 ,  H03F1/52 ,  H03F3/183 ,  H03F3/21 ,  H03F2200/321 ,  H03F2200/375 ,  H03F2200/471 ,  H03F2200/78 ,  H03G11/00 ,  H04R1/00 ,  H04R3/007 ,  H04R2201/028 ,  H04R2499/13

Abstract: A digital circuit can be used in a speaker system. An intermediate node provides a speaker protection control signal. A first latch for receives an offset control signal. A first logic gate receives a play control signal, the offset control signal, and the speaker protection control signal. A second logic gate is coupled to the first latch for receiving the play control signal and the speaker protection control signal. A second latch is coupled to the first logic gate for providing a forced mute signal. A third latch is coupled to the second logic gate and to the intermediate node.

Abstract translation: 数字电路可用于扬声器系统。 中间节点提供扬声器保护控制信号。 用于接收偏移控制信号的第一锁存器。 第一逻辑门接收播放控制信号，偏移控制信号和扬声器保护控制信号。 第二逻辑门耦合到第一锁存器，用于接收播放控制信号和扬声器保护控制信号。 第二锁存器耦合到第一逻辑门以提供强制静音信号。 第三锁存器耦合到第二逻辑门和中间节点。