公开(公告)号：US09609416B2

公开(公告)日：2017-03-28

申请号：US14299836

申请日：2014-06-09

Applicant: Cirrus Logic, Inc.

Inventor： Roy Scott Kaller ,  Aaron Brennan

IPC: H04R1/10 ,  G08G1/0967

CPC classification number: H04R1/1041 ,  G08G1/096791 ,  H04R1/1083

Abstract: An optical sensor may be integrated into headphones and feedback from the sensor used to adjust an audio output from the headphones. For example, an emergency vehicle traffic preemption signal may be detected by the optical sensor. Optical signals may be processed in a pattern discriminator, which may be integrated with an audio controller integrated circuit (IC). When the signal is detected, the playback of music through the headphones may be muted and/or a noise cancellation function turned off. The optical sensor may be integrated in a music player, a smart phone, a tablet, a cord-mounted module, or the earpieces of the headphones.

公开(公告)号：US20150358718A1

公开(公告)日：2015-12-10

申请号：US14299836

申请日：2014-06-09

Applicant: Cirrus Logic, Inc.

Inventor： Roy Scott Kaller ,  Aaron Brennan

IPC: H04R1/10

CPC classification number: H04R1/1041 ,  G08G1/096791 ,  H04R1/1083

Abstract: An optical sensor may be integrated into headphones and feedback from the sensor used to adjust an audio output from the headphones. For example, an emergency vehicle traffic preemption signal may be detected by the optical sensor. Optical signals may be processed in a pattern discriminator, which may be integrated with an audio controller integrated circuit (IC). When the signal is detected, the playback of music through the headphones may be muted and/or a noise cancellation function turned off. The optical sensor may be integrated in a music player, a smart phone, a tablet, a cord-mounted module, or the earpieces of the headphones.

Abstract translation: 光学传感器可以集成到耳机中，并且来自用于调节耳机的音频输出的传感器的反馈。 例如，可以由光学传感器检测紧急车辆交通抢占信号。 光信号可以在图案鉴别器中进行处理，其可与音频控制器集成电路（IC）集成。 当检测到信号时，通过耳机播放音乐可能被静音和/或噪声消除功能关闭。 光学传感器可以集成在音乐播放器，智能电话，平板电脑，电线安装模块或耳机的耳机中。

公开(公告)号：US09941848B1

公开(公告)日：2018-04-10

申请号：US14520060

申请日：2014-10-21

Applicant: Cirrus Logic, Inc.

Inventor： Ramin Zanbaghi ,  Aaron Brennan ,  Johann Gaboriau ,  Prashanth Drakshapalli ,  Vamsikrishna Parupalli

IPC: H03F1/34 ,  H03F3/187 ,  H03F1/02

CPC classification number: H03F3/187 ,  H03F1/02 ,  H03F1/14 ,  H03F2200/03 ,  H03F2200/135 ,  H03F2200/408 ,  H03F2200/54

Abstract: In accordance with embodiments of the present disclosure, a transconductance with capacitances feedback compensation amplifier may include a capacitor in parallel with an inner feedback loop of the amplifier for providing cascade compensation to the amplifier.

公开(公告)号：US09722620B1

公开(公告)日：2017-08-01

申请号：US15338818

申请日：2016-10-31

Applicant: Cirrus Logic, Inc.

Inventor： Ramin Zanbaghi ,  Yousof Mortazavi ,  John L. Melanson ,  Aaron Brennan

IPC: H03M1/06 ,  G10L19/00

CPC classification number: H03M1/0602 ,  G10L19/00 ,  H03M1/1004 ,  H03M1/1038 ,  H03M1/1042 ,  H03M1/188 ,  H03M1/60

Abstract: The overall performance of a dual-path ADC system may be improved by using a VCO-based ADC for small-amplitude signals and employing non-linear cancelation to remove nonlinearities in signals output by the VCO-based ADC. In particular, VCO-based dual-path ADC systems of this disclosure may be configured to receive a first digital signal from a first ADC and a second digital signal from a second ADC, wherein the second digital signal is more non-linear than the first digital signal. The dual-path systems may also be configured to determine one or more non-linear coefficients of the second digital signal based, at least in part, on processing of the first and second digital signals. The dual-path systems may be further configured to modify the second digital signal based, at least in part, on the determined one or more non-linear coefficients to generate a more linear second digital signal.

公开(公告)号：US09293986B2

公开(公告)日：2016-03-22

申请号：US14108101

申请日：2013-12-16

Applicant: Cirrus Logic, Inc.

Inventor： Bharath Kumar Thandri ,  Thuan L. Nguyen ,  Daniel John Allen ,  Lingli Zhang ,  Aniruddha Satoskar ,  Aaron Brennan ,  Dan Shen

IPC: H03F1/30 ,  H02M3/07 ,  H03F1/02

CPC classification number: H02M3/07 ,  H03F1/025 ,  H03F3/005 ,  H03F3/187 ,  H03F2200/03 ,  H03F2200/555 ,  H03F2200/78

Abstract: Kickback current from a charge pump to a power management integrated circuit (PMIC) may be reduced by dissipating charge from fly and hold capacitors during mode transitions. A switch may be placed in series between the charge pump and the PMIC to disconnect the charge pump and prevent kickback current from reaching the PMIC. Further, additional loads, as switches, may be coupled to the charge pump outputs to dissipate charge from the fly and hold capacitors. Additionally, a closed feedback loop may be used to monitor and discharge excess charge from the fly and hold capacitors during mode transitions. Furthermore, charge may be redistributed between the fly and hold capacitors during mode transitions to reduce the time period of the transition.

Abstract translation: 可以通过在模式转换期间通过耗散来自飞行和保持电容器的电荷来减少从电荷泵到功率管理集成电路（PMIC）的启动电流。 开关可以串联放置在电荷泵和PMIC之间以断开电荷泵，并防止反冲电流到达PMIC。 此外，作为开关的附加负载可以耦合到电荷泵输出以从飞行和保持电容器消散电荷。 另外，在模式转换期间，可以使用闭合反馈回路来监测和排出来自飞行和保持电容器的过量电荷。 此外，在模式转换期间，可以在飞行和保持电容器之间重新分配电荷以减少转换的时间段。

公开(公告)号：US20140340158A1

公开(公告)日：2014-11-20

申请号：US14108101

申请日：2013-12-16

Applicant: Cirrus Logic, Inc.

Inventor： Bharath Kumar Thandri ,  Thuan L. Nguyen ,  Daniel John Allen ,  Lingli Zhang ,  Aniruddha Satoskar ,  Aaron Brennan ,  Dan Shen

IPC: H02M3/07 ,  H03F1/02

CPC classification number: H02M3/07 ,  H03F1/025 ,  H03F3/005 ,  H03F3/187 ,  H03F2200/03 ,  H03F2200/555 ,  H03F2200/78

Abstract: Kickback current from a charge pump to a power management integrated circuit (PMIC) may be reduced by dissipating charge from fly and hold capacitors during mode transitions. A switch may be placed in series between the charge pump and the PMIC to disconnect the charge pump and prevent kickback current from reaching the PMIC. Further, additional loads, as switches, may be coupled to the charge pump outputs to dissipate charge from the fly and hold capacitors. Additionally, a closed feedback loop may be used to monitor and discharge excess charge from the fly and hold capacitors during mode transitions. Furthermore, charge may be redistributed between the fly and hold capacitors during mode transitions to reduce the time period of the transition.

Abstract translation: 可以通过在模式转换期间通过耗散来自飞行和保持电容器的电荷来减少从电荷泵到功率管理集成电路（PMIC）的启动电流。 开关可以串联放置在电荷泵和PMIC之间以断开电荷泵，并防止反冲电流到达PMIC。 此外，作为开关的附加负载可以耦合到电荷泵输出以从飞行和保持电容器消散电荷。 另外，在模式转换期间，可以使用闭合反馈回路来监测和排出来自飞行和保持电容器的过量电荷。 此外，在模式转换期间，可以在飞行和保持电容器之间重新分配电荷以减少转换的时间段。