公开(公告)号：US10063218B2

公开(公告)日：2018-08-28

申请号：US14270296

申请日：2014-05-05

Applicant: Cirrus Logic, Inc.

Inventor： Dan Shen

IPC: H03F99/00 ,  H03K3/037 ,  H03F3/217 ,  H03K3/3565

CPC classification number: H03K3/0377 ,  H03F3/217 ,  H03F3/2171 ,  H03F3/2173 ,  H03K3/3565

Abstract: Voltage level shifting in a switching output stage is presented. The circuit may include a switching output stage configured to receive an analog input signal and provide a responsive digital output signal, the switching output stage having a first switching device coupled to a first supply voltage and a second switching device coupled to a second supply voltage, the first switching device and the second switching device being coupled to a common output node. The apparatus may also include a voltage level shifter circuit coupled to a switching control node of the second switching device, the voltage level shifter configured to shift a voltage level at the switching control node of the second switching device relative to the analog input signal, wherein the digital output signal at the common output node transitions as the input signal reaches a predetermined threshold value.

公开(公告)号：US20150318844A1

公开(公告)日：2015-11-05

申请号：US14270296

申请日：2014-05-05

Applicant: Cirrus Logic, Inc.

Inventor： Dan Shen

IPC: H03K3/037

CPC classification number: H03K3/0377 ,  H03F3/217 ,  H03F3/2171 ,  H03F3/2173 ,  H03K3/3565

Abstract: Voltage level shifting in a switching output stage is presented. The circuit may include a switching output stage configured to receive an analog input signal and provide a responsive digital output signal, the switching output stage having a first switching device coupled to a first supply voltage and a second switching device coupled to a second supply voltage, the first switching device and the second switching device being coupled to a common output node. The apparatus may also include a voltage level shifter circuit coupled to a switching control node of the second switching device, the voltage level shifter configured to shift a voltage level at the switching control node of the second switching device relative to the analog input signal, wherein the digital output signal at the common output node transitions as the input signal reaches a predetermined threshold value.

Abstract translation: 提出了开关输出级的电压电平转换。 电路可以包括开关输出级，其被配置为接收模拟输入信号并提供响应数字输出信号，开关输出级具有耦合到第一电源电压的第一开关器件和耦合到第二电源电压的第二开关器件， 第一开关装置和第二开关装置耦合到公共输出节点。 该装置还可以包括耦合到第二开关装置的开关控制节点的电压电平移位器电路，电压电平移位器被配置为相对于模拟输入信号移位第二开关装置的开关控制节点处的电压电平，其中 公共输出节点处的数字输出信号随着输入信号达到预定阈值而转变。

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。

公开(公告)号：US08872561B2

公开(公告)日：2014-10-28

申请号：US13829831

申请日：2013-03-14

Applicant: Cirrus Logic, Inc.

Inventor： Dan Shen ,  Lingli Zhang ,  Johann Gaboriau

IPC: H03K5/12 ,  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：US20140266109A1

公开(公告)日：2014-09-18

申请号：US13829945

申请日：2013-03-14

Applicant: CIRRUS LOGIC, INC.

Inventor： Lingli Zhang ,  Dan Shen ,  Johann Gaboriau

IPC: H02M1/15

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.

Abstract translation: 根据本公开的实施例，系统和方法可以包括被配置为指示功率转换器的开关节点的开关节点电压的输入，该功率转换器的开关节点包括在其非栅极端子处接地电压和开关 节点和第二开关器件，其在非栅极端子处耦合在输出电源节点和开关节点之间。 所述系统和方法还可以包括耦合到第一开关器件的输入端和栅极端子的预驱动电路，该预驱动电路被配置为将输入电压信号驱动到第一开关器件的栅极端并被配置为选择有效阻抗 基于输入的第一开关装置的栅极端子。

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：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：US20150318854A1

公开(公告)日：2015-11-05

申请号：US14270319

申请日：2014-05-05

Applicant: Cirrus Logic, Inc.

Inventor： Dan Shen

IPC: H03K17/693 ,  H04R3/00 ,  H03F3/217 ,  H02J1/06 ,  H03K17/687

CPC classification number: H03K17/693 ,  H02J1/06 ,  H02J2001/008 ,  H03F3/217 ,  H03F3/2171 ,  H03K17/6872 ,  H04R3/00 ,  Y10T307/549

Abstract: Embodiments of apparatuses and methods for proportional feedback for reduced overshoot and undershoot in a switched output are described. An embodiment of an apparatus includes a switching output stage configured to receive an input signal and provide a responsive output signal. The apparatus may also include a pulling circuit coupled to one of the first switching device and the second switching device. The pulling circuit may pull a control voltage of power transistors in the switching output stage to reduce impedance of at least one of the transistors in response to a determination that the output signal at the common output node is outside of a predetermined range of a threshold value. Pulling strength may increase as a voltage difference between the output signal and one of the first supply voltage and the second supply voltage increases.

Abstract translation: 描述用于比例反馈的装置和方法的实施例，用于减少开关输出中的过冲和下冲。 一种装置的实施例包括：开关输出级，其被配置为接收输入信号并提供响应输出信号。 该装置还可以包括耦合到第一开关装置和第二开关装置之一的牵引电路。 拉动电路可以在开关输出级中拉动功率晶体管的控制电压，以响应于在公共输出节点处的输出信号在阈值的预定范围之外的确定来减小至少一个晶体管的阻抗 。 随着输出信号与第一电源电压和第二电源电压中的一个之间的电压差增加，牵引强度可能增加。

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。