公开(公告)号：WO2008024665A2

公开(公告)日：2008-02-28

申请号：PCT/US2007/076068

申请日：2007-08-16

Applicant: CIRRUS LOGIC, INC.

Inventor： TICKER, John, Christopher ,  ALLEN, Daniel, John ,  MELANSON, John, L. ,  PRASAD, Ammisetti

IPC: H03F99/00

CPC classification number: H03G3/004 ,  H02M3/07 ,  H03F1/0227 ,  H03F1/025 ,  H03F3/183 ,  H03F2200/03 ,  H03F2200/211 ,  H03F2200/507 ,  H03G3/20 ,  H03G3/3031

Abstract: An energy-efficient consumer device audio power output stage provides improved battery life and reduced power dissipation. A power supply having a selectable operating mode supplies the power supply rails to the power amplified output stage. The operating mode is controlled in conformity with the audio signal level, which may be determined from a volume control setting of the device and/or from a signal level detector that determines the amplitude of the signal being amplified. The power supply may be a charge pump in which the operating mode uses a capacitive divider to provide for selection of a power supply output voltage that is a rational fraction of the power supply output voltage in a full-voltage operating mode.

Abstract translation:

高能效消费类设备音频功率输出级可延长电池寿命并降低功耗。 具有可选工作模式的电源将电源轨道提供给功率放大输出级。 操作模式根据音频信号电平进行控制，音频信号电平可以根据设备的音量控制设置和/或根据确定被放大的信号的幅度的信号电平检测器来确定。 电源可以是电荷泵，其中操作模式使用电容分压器来提供电源输出电压的选择，该电源输出电压是全电压操作模式中的电源输出电压的有理分数。

公开(公告)号：WO2014028206A1

公开(公告)日：2014-02-20

申请号：PCT/US2013/052617

申请日：2013-07-30

Applicant: CIRRUS LOGIC, INC.

Inventor： ALLEN, Daniel, John ,  NGUYEN, Thuan, Luong ,  ILANGO, Anand, S. ,  TUCKER, John, Christopher

IPC: H04R3/00 ,  H04R29/00 ,  H04R5/033 ,  H04R5/04

CPC classification number: H04R3/00 ,  H04R5/033 ,  H04R5/04 ,  H04R29/00 ,  H04R2420/05

Abstract: A circuit including headset type detection provides compatibility with different transducer types, such as headphones provided by different manufacturers. An audio circuit that generates or receives an audio signal includes electrical terminals for coupling to a transducer device, at least one of which carries the audio signal. A transducer device type detection circuit is included and detects a type of a transducer device coupled to the audio device from characteristics measured at the multiple electrical terminals when the transducer is coupled to the audio device. The circuit also includes a configuration control circuit for altering a configuration of the audio device according to a detected type of the transducer device.

Abstract translation: 包括耳机类型检测的电路提供与不同传感器类型的兼容性，例如由不同制造商提供的耳机。 产生或接收音频信号的音频电路包括用于耦合到换能器装置的电端子，其中至少一个承载音频信号。 包括传感器装置类型检测电路，并且当换能器耦合到音频装置时，根据在多个电端子处测量的特性来检测耦合到音频装置的换能器装置的类型。 该电路还包括配置控制电路，用于根据检测到的换能器装置的类型改变音频装置的配置。

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。