公开(公告)号：WO2015171525A1

公开(公告)日：2015-11-12

申请号：PCT/US2015/029113

申请日：2015-05-04

Applicant: CIRRUS LOGIC, INC.

Inventor： SHEN, Dan

IPC: H03F3/217 ,  H03K3/3565 ,  H03K19/0185

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 (202) configured to receive an analog input signal and provide a responsive digital output signal, the switching output stage (202) having a first switching device (304) coupled to a first supply voltage (302) and a second switching device (314) coupled to a second supply voltage (310), the first switching device (304) and the second switching device (314) being coupled to a common output node (308). The apparatus may also include a voltage level shifter circuit (210) coupled to a switching control node of the second switching device (314), the voltage level shifter (210) configured to shift a voltage level at the switching control node of the second switching device (314) 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。 电路可以包括被配置为接收模拟输入信号并提供响应数字输出信号的开关输出级（202），开关输出级（202）具有耦合到第一电源电压（302）的第一开关器件（304） 以及耦合到第二电源电压（310）的第二开关装置（314），所述第一开关装置（304）和所述第二开关装置（314）耦合到公共输出节点（308）。 该装置还可以包括耦合到第二开关装置（314）的开关控制节点的电压电平移位器电路（210），该电压电平移位器（210）被配置为使第二开关的开关控制节点处的电压电平 设备（314）相对于模拟输入信号，其中在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：WO2015171524A1

公开(公告)日：2015-11-12

申请号：PCT/US2015/029112

申请日：2015-05-04

Applicant: CIRRUS LOGIC, INC.

Inventor： SHEN, Dan

IPC: H03F3/217

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 (106) configured to receive an input signal and provide a responsive output signal. The apparatus may also include a pulling circuit coupled (104) to one of the first switching device (306) and the second switching device (308). The pulling circuit (104) may pull a control voltage of power transistors (306, 308) in the switching output stage (106) to reduce impedance of at least one of the transistors (306, 308) in response to a determination that the output signal at the common output node (310) 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 (312) and the second supply voltage (314) 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。 装置的实施例包括被配置为接收输入信号并提供响应输出信号的开关输出级（106）。 该装置还可以包括耦合到第一开关装置（306）和第二开关装置（308）中的一个的牵引电路（104）。 拉动电路（104）可以拉动开关输出级（106）中的功率晶体管（306,308）的控制电压，以响应于确定输出端（106,308）的输出来减小至少一个晶体管（306,308）的阻抗 在公共输出节点（310）处的信号在阈值的预定范围之外。 随着输出信号与第一电源电压（312）和第二电源电压（314）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：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。