公开(公告)号：US20140266310A1

公开(公告)日：2014-09-18

申请号：US13829831

申请日：2013-03-14

Applicant: CIRRUS LOGIC, INC.

Inventor： Dan Shen ,  Lingli Zhang ,  Johann Gaboriau

IPC: H03K5/1534

CPC classification number: H03K17/133 ,  H02M2001/0009 ,  H03F3/2171

Abstract: In accordance with these and other embodiments of the present disclosure, an apparatus and a method may include receiving a first input configured to indicate an output voltage of an output node of a switched output stage comprising a pull-down driver device coupled at its non-gate terminals between a ground voltage and the output node and a pull-up driver device coupled at its non-gate terminals between a supply voltage and the output node. The method may also include receiving a second input configured to indicate a gate voltage of a gate terminal of a first one of the pull-up driver device and the pull-down driver device. The method may further include detecting direction of an output current flowing into or out of the output node based on the first input and the second input.

Abstract translation: 根据本公开的这些和其他实施例，装置和方法可以包括接收被配置为指示切换输出级的输出节点的输出电压的第一输入，包括在其非易失性存储器处耦合的下拉驱动器器件， 接地电压和输出节点之间的栅极端子和在其非栅极端子处在电源电压和输出节点之间耦合的上拉驱动器器件。 该方法还可以包括接收被配置为指示上拉驱动器器件和下拉驱动器器件中的第一个的栅极端子的栅极电压的第二输入。 该方法还可以包括基于第一输入和第二输入来检测流入或流出输出节点的输出电流的方向。

公开(公告)号：US20160118949A1

公开(公告)日：2016-04-28

申请号：US14920698

申请日：2015-10-22

Applicant: Cirrus Logic, Inc.

Inventor： Lingli Zhang ,  Huan Wang ,  Yongjie Cheng ,  Christian Larsen

IPC: H03F3/185 ,  H03F3/217 ,  H03F1/02

CPC classification number: H03F3/185 ,  H03F1/0205 ,  H03F1/305 ,  H03F3/2171 ,  H03F2200/03 ,  H03F2200/351 ,  H03F2200/375

Abstract: A variable ramp up/down gain in a pre-power stage block of an audio amplifier may be used to reduce audible pops and clicks output by the audio amplifier. A controller may adjust the variable ramp up/down gain during operation of the audio amplifier. The variable ramp up/down gain may be implemented as a pulse width modulation (PWM) modulator/generator with a ramp-up and ramp-down gain under control of the controller. The variable ramp up/down gain smooths transitions of the offset between a pre-power stage block and a feedback loop and thus can reduce audible pops and clicks by reducing the offset that is amplified in the power stage block of the audio amplifier.

Abstract translation: 可以使用音频放大器的功率前级块中的可变斜坡上升/下降增益来减少由音频放大器输出的声音弹出和喀哒声。 控制器可以在音频放大器的操作期间调节可变斜坡上升/下降增益。 可变斜坡上升/下降增益可以实现为在控制器的控制下具有斜升和斜降增益的脉宽调制（PWM）调制器/发生器。 可变斜坡上升/下降增益平滑了功率前级块和反馈回路之间的偏移的转换，并且因此可以通过减小在音频放大器的功率级块中放大的偏移来减少可听见的声音和咔嗒声。

公开(公告)号：US20140266126A1

公开(公告)日：2014-09-18

申请号：US13830047

申请日：2013-03-14

Applicant: CIRRUS LOGIC, INC.

Inventor： Dan Shen ,  Johann Gaboriau ,  Lingli Zhang ,  Christian Larsen

IPC: H02M1/08

CPC classification number: H02M1/08

Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a switch coupled at its gate terminal to an input signal voltage, the input signal voltage for controlling a gate voltage of a gate terminal of a driver device coupled at its non-gate terminals between a rail voltage and an output node. The systems and methods may also include a diode having a first terminal and a second terminal, the diode coupled to a non-gate terminal of the switch such that when the switch is enabled, the first terminal is electrically coupled to the gate terminal of the driver device and the second terminal is electrically coupled to the output node.

Abstract translation: 根据本公开的实施例，系统和方法可以包括在其栅极端子处耦合到输入信号电压的开关，用于控制耦合在其非门的驱动器件的栅极端子的栅极电压的输入信号电压 轨道电压和输出节点之间的端子。 系统和方法还可以包括具有第一端子和第二端子的二极管，二极管耦合到开关的非栅极端子，使得当开关被使能时，第一端子电连接到开关的栅极端子 驱动器装置和第二端子电耦合到输出节点。

公开(公告)号：US09847706B2

公开(公告)日：2017-12-19

申请号：US13829945

申请日：2013-03-14

Applicant: Cirrus Logic, Inc.

Inventor： Lingli Zhang ,  Dan Shen ,  Johann Gaboriau

IPC: H02M1/15 ,  H02M3/158 ,  H03K17/16

CPC classification number: H02M1/15 ,  H02M3/1588 ,  H03K17/162 ,  H03K2217/0063 ,  Y02B70/1466

Abstract: In accordance with embodiments of the present disclosure, systems and methods may include an input configured to indicate a switching node voltage of a switching node of a power converter comprising a first switch device coupled at its non-gate terminals between a ground voltage and the switching node and a second switch device coupled at its non-gate terminals between an output supply node and the switching node. The systems and methods may also include a predriver circuit coupled to the input and a gate terminal of the first switch device, the predriver circuit configured to drive an input voltage signal to the gate terminal of the first switch device and configured to select an effective impedance of the gate terminal of the first switch device based on the input.

公开(公告)号：US09252764B1

公开(公告)日：2016-02-02

申请号：US13795975

申请日：2013-03-12

Applicant: Cirrus Logic, Inc.

Inventor： Dan Shen ,  Lingli Zhang ,  Johann Gaboriau

IPC: H03K3/00 ,  H03K17/16

CPC classification number: H03K17/165

Abstract: In accordance with embodiments of the present disclosure, an apparatus may include an input for indicating a characteristic of an output load current of a switched output stage comprising at least one driver device and a predriver circuit coupled to the input and a gate terminal of the at least one driver device, the predriver circuit for driving an input voltage signal to the gate terminal and configured to select an effective impedance of the gate terminal based on the input for indicating the output load current. In accordance with these and other embodiments of the disclosure, a method may include receiving an input for indicating a characteristic of an output load current of a switched output stage comprising at least one driver device and selecting an effective impedance of a gate terminal of the at least one driver device based on the input for indicating the output load current.

Abstract translation: 根据本公开的实施例，装置可以包括用于指示切换输出级的输出负载电流的特性的输入，包括至少一个驱动器装置和耦合到输入的预驱动电路以及耦合到at 至少一个驱动器装置，用于将输入电压信号驱动到栅极端子的预驱动电路，并且被配置为基于用于指示输出负载电流的输入来选择栅极端子的有效阻抗。 根据本公开的这些和其他实施例，一种方法可以包括接收用于指示切换输出级的输出负载电流的特性的输入，该输出负载电流包括至少一个驱动器器件，并且选择一个门极端子的有效阻抗 基于用于指示输出负载电流的输入的至少一个驱动器装置。

公开(公告)号：US09323256B1

公开(公告)日：2016-04-26

申请号：US13776309

申请日：2013-02-25

Applicant: Cirrus Logic, Inc.

Inventor： Lingli Zhang ,  Johann Gaboriau ,  Mehul Marolia ,  Aiman Alhoussami

IPC: G05F1/10 ,  H01J1/00

CPC classification number: G05F1/10

Abstract: In accordance with these and other embodiments of the present disclosure, a system and method include supplying, by a single boost converter, power to a first circuit that provides a circuit operation and power to a second circuit that provides another circuit operation. The system and method also include receiving, by a controller coupled to the single boost controller, an operating condition signal indicative of at least one of: (i) a power delivered by the single boost converter, and (ii) a temperature of the single integrated circuit. The system and method further include allocating, by the controller, power deliverable by the single boost converter between the first circuit and second circuit in response to the operating condition signal.

Abstract translation: 根据本公开的这些和其他实施例，系统和方法包括通过单个升压转换器向第一电路提供电力，该第一电路向提供另一电路操作的第二电路提供电路操作和电力。 该系统和方法还包括由耦合到单个升压控制器的控制器接收指示以下至少一个的操作条件信号：（i）由单个升压转换器输送的功率，和（ii）单个升压转换器的温度 集成电路。 该系统和方法还包括响应于操作条件信号，由控制器分配单个升压转换器在第一电路和第二电路之间可传递的电力。

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。

公开(公告)号：US09673762B2

公开(公告)日：2017-06-06

申请号：US14920698

申请日：2015-10-22

Applicant: Cirrus Logic, Inc.

Inventor： Lingli Zhang ,  Huan Wang ,  Yongjie Cheng ,  Christian Larsen

IPC: H03F3/38 ,  H03F3/185 ,  H03F1/02 ,  H03F3/217 ,  H03F1/30

CPC classification number: H03F3/185 ,  H03F1/0205 ,  H03F1/305 ,  H03F3/2171 ,  H03F2200/03 ,  H03F2200/351 ,  H03F2200/375

Abstract: A variable ramp up/down gain in a pre-power stage block of an audio amplifier may be used to reduce audible pops and clicks output by the audio amplifier. A controller may adjust the variable ramp up/down gain during operation of the audio amplifier. The variable ramp up/down gain may be implemented as a pulse width modulation (PWM) modulator/generator with a ramp-up and ramp-down gain under control of the controller. The variable ramp up/down gain smooths transitions of the offset between a pre-power stage block and a feedback loop and thus can reduce audible pops and clicks by reducing the offset that is amplified in the power stage block of the audio amplifier.

公开(公告)号：US08970258B2

公开(公告)日：2015-03-03

申请号：US13830047

申请日：2013-03-14

Applicant: Cirrus Logic, Inc.

Inventor： Dan Shen ,  Johann Gaboriau ,  Lingli Zhang ,  Christian Larsen

IPC: H03K3/00 ,  H02M1/08

CPC classification number: H02M1/08

Abstract: In accordance with embodiments of the present disclosure, systems and methods may include a switch coupled at its gate terminal to an input signal voltage, the input signal voltage for controlling a gate voltage of a gate terminal of a driver device coupled at its non-gate terminals between a rail voltage and an output node. The systems and methods may also include a diode having a first terminal and a second terminal, the diode coupled to a non-gate terminal of the switch such that when the switch is enabled, the first terminal is electrically coupled to the gate terminal of the driver device and the second terminal is electrically coupled to the output node.

Abstract translation: 根据本公开的实施例，系统和方法可以包括在其栅极端子处耦合到输入信号电压的开关，用于控制耦合在其非门的驱动器件的栅极端子的栅极电压的输入信号电压 轨道电压和输出节点之间的端子。 系统和方法还可以包括具有第一端子和第二端子的二极管，二极管耦合到开关的非栅极端子，使得当开关被使能时，第一端子电连接到开关的栅极端子 驱动器装置和第二端子电耦合到输出节点。