公开(公告)号：WO2015039002A2

公开(公告)日：2015-03-19

申请号：PCT/US2014/055576

申请日：2014-09-15

Applicant: CIRRUS LOGIC, INC.

Inventor： ILANGO, Anand ,  ALLEN, Daniel John ,  JINDAL, Vivek ,  SATOSKAR, Aniruddha ,  THANDRI, Bharath Kumar

IPC: H03F1/02

CPC classification number: H03F1/52 ,  H03F1/0211 ,  H03F1/0227 ,  H03F3/181 ,  H03F3/183 ,  H04R5/04 ,  H04R2420/05

Abstract: In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal. The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal.

Abstract translation: 根据本公开的系统和方法，音频设备可以包括电端子，音频电路和换能器负载检测电路。 电端子可以将换能器装置耦合到音频装置。 音频电路可以生成模拟音频信号，其中模拟音频信号被耦合到电端子。 换能器负载检测电路可以在换能器装置从电端子处测量的特性耦合到音频装置时检测换能器装置的负载阻抗。

公开(公告)号：WO2015038257A2

公开(公告)日：2015-03-19

申请号：PCT/US2014/049760

申请日：2014-08-05

Applicant: CIRRUS LOGIC, INC.

Inventor： ILANGO, Anand ,  ALLEN, Daniel John ,  SATOSKAR, Aniruddha

IPC: H03F1/02

CPC classification number: H04R3/007 ,  G10K11/17854 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/30232 ,  G10K2210/3045 ,  G10K2210/3049 ,  H03F1/0211 ,  H03F1/0227 ,  H03F1/52 ,  H03F3/181 ,  H03F3/183 ,  H03F3/185 ,  H03F3/52 ,  H03F2200/03 ,  H03F2200/462 ,  H03F2200/471 ,  H04R5/04 ,  H04R29/001 ,  H04R2420/05

Abstract: In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal. The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal.

公开(公告)号：WO2014186296A1

公开(公告)日：2014-11-20

申请号：PCT/US2014/037725

申请日：2014-05-12

Applicant: CIRRUS LOGIC, INC.

Inventor： THANDRI, Bharath, Kumar ,  NGUYEN, Thuan, L. ,  ALLEN, Daniel, John ,  ZHANG, Lingli ,  SATOSKAR, Aniruddha ,  BRENNAN, Aaron ,  SHEN, Dan

IPC: G05F1/10

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。