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    A SYSTEM AND METHOD FOR CLOSE-DOWN POP REDUCTION
    2.
    发明申请
    A SYSTEM AND METHOD FOR CLOSE-DOWN POP REDUCTION 审中-公开
    一种减少POP减少的系统和方法

    公开(公告)号：WO2016083081A1

    公开(公告)日：2016-06-02

    申请号：PCT/EP2015/075433

    申请日：2015-11-02

    申请人： BANG & OLUFSEN ICEPOWER A/S

    发明人： SKOV ANDERSEN, Kennet

    IPC分类号： H03F3/187 ,  H03F3/217 ,  H03F1/30 ,  H03F3/45 ,  H03G3/34

    CPC分类号： H03F1/305 ,  H03F1/02 ,  H03F3/183 ,  H03F3/187 ,  H03F3/217 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/129 ,  H03F2200/135 ,  H03F2200/144 ,  H03F2200/156 ,  H03F2200/258 ,  H03F2200/342 ,  H03F2200/426 ,  H03F2200/441 ,  H03F2200/444 ,  H03F2200/66 ,  H03F2200/78 ,  H03G3/301 ,  H03G3/348 ,  H03G2201/106

    摘要： A close-down pop reduction system and a method for close-down pop reduction in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path having a compensator and a switching power stage and a signal path from an output of a comparator in the switching power stage to a sequence control unit. The signal path includes a close-down timing circuit configured to provide a timing signal. The sequence control unit is configured to eliminate the input signal, increase the switch frequency of the close-down pop reduction system and disable the switching power stage at a moment in time within a PWM pulse of the switching power stage. Hereby, it is e.g. possible to minimize the audible pop during close- down of audio amplifier assemblies.

    摘要翻译： 公开了一种用于音频放大器组件中的关闭弹出缩小系统和关闭弹出缩小的方法。 开关功率转换系统包括具有补偿器和开关功率级的正向路径以及从开关功率级的比较器的输出到序列控制单元的信号路径。 信号路径包括被配置为提供定时信号的关闭定时电路。 顺序控制单元被配置为消除输入信号，增加关闭弹出式缩小系统的开关频率，并且在开关功率级的PWM脉冲内的时间上禁用开关功率级。 因此，例如 可能在关闭音频放大器组件期间最小化可听见的音乐。

    MODIFIED SWITCHING RIPPLE FOR ENVELOPE TRACKING SYSTEM
    3.
    发明申请
    MODIFIED SWITCHING RIPPLE FOR ENVELOPE TRACKING SYSTEM 审中-公开
    改进的开关跟踪系统

    公开(公告)号：WO2013012787A2

    公开(公告)日：2013-01-24

    申请号：PCT/US2012/046887

    申请日：2012-07-16

    申请人： RF MICRO DEVICES, INC.

    发明人： KHLAT, Nadim ,  KAY, Michael, R.

    IPC分类号： H03F1/32

    CPC分类号： H04B1/0475 ,  H03F1/0227 ,  H03F1/305

    摘要： Radio frequency (RF) transmitter circuitry, which includes an RF power amplifier (PA) and an envelope tracking power supply, is disclosed. The RF PA receives and amplifies an RF input signal to provide an RF transmit signal using an envelope power supply signal. The envelope tracking power supply provides the envelope power supply signal, which has switching ripple. Further, the envelope tracking power supply operates in either a normal switching ripple mode or a modified switching ripple mode, such that during the normal switching ripple mode, the envelope power supply signal has normal switching ripple, and during the modified switching ripple mode, the envelope power supply signal has modified switching ripple. When the modified switching ripple is required, the envelope tracking power supply operates in the modified switching ripple mode.

    摘要翻译： 公开了包括RF功率放大器（PA）和包络跟踪电源的射频（RF）发射机电路。 RF PA接收并放大RF输入信号，以使用包络电源信号提供RF发射信号。 信封跟踪电源提供具有开关纹波的信封电源信号。 此外，包络跟踪电源以正常开关纹波模式或修改的开关纹波模式工作，使得在正常开关纹波模式期间，包络电源信号具有正常的开关纹波，并且在修改的开关纹波模式期间， 信号电源信号改变了开关纹波。 当需要修改的开关纹波时，包络跟踪电源以修改的开关纹波模式运行。

    POP-UP NOISE REDUCTION IN A DEVICE
    4.
    发明申请
    POP-UP NOISE REDUCTION IN A DEVICE 审中-公开
    在设备中增加噪声减少

    公开(公告)号：WO2011064787A1

    公开(公告)日：2011-06-03

    申请号：PCT/IN2009/000693

    申请日：2009-11-30

    申请人： ST-ERICSSON INDIA PVT. LTD. ,  ST-ERICSSON SA ,  SEEDHER, Ankit ,  PRABHU J, Raja ,  SOMAYAJULA S, Shyam

    发明人： SEEDHER, Ankit ,  PRABHU J, Raja ,  SOMAYAJULA S, Shyam

    IPC分类号： H03F1/30 ,  H03F3/217

    CPC分类号： H03F3/217 ,  H03F1/305

    摘要： A device implementing a scheme for reduction of pop-up noise is disclosed. The device comprises an audio subsystem (100) having an integrator (112) for amplifying an input signal (133) and a modulation circuit (114) including one or more comparators. The audio subsystem (100) is further provided with a feedback loop (142) across the integrator (112) and the modulation circuit (114) to calibrate an offsets outputs of the integrator (112) and the modulation circuit (114). The feedback loop (142) includes an integrator-offset loop (202) across the integrator (112) to calibrate an offset (136) in the output of the integrator (112), and an offset calibration loop (302) across the modulation circuit (114) to calibrate an offset (140) in the output of the modulation circuit (114).

    摘要翻译： 公开了实现减少弹出噪声的方案的装置。 该装置包括具有用于放大输入信号的积分器（112）和包括一个或多个比较器的调制电路（114）的音频子系统（100）。 音频子系统（100）还在整个积分器（112）和调制电路（114）之间设置有反馈回路（142），以校准积分器（112）和调制电路（114）的偏移输出。 反馈回路（142）包括横跨积分器（112）的积分器偏移回路（202），以校准积分器（112）的输出中的偏移（136），以及跨越调制电路的偏移校准回路（302） （114）来校准调制电路（114）的输出中的偏移（140）。

    SIGNAL PROCESSOR COMPRISING A REFERENCE VOLTAGE CIRCUIT
    6.
    发明申请
    SIGNAL PROCESSOR COMPRISING A REFERENCE VOLTAGE CIRCUIT 审中-公开
    包含参考电压电路的信号处理器

    公开(公告)号：WO2008107849A1

    公开(公告)日：2008-09-12

    申请号：PCT/IB2008/050797

    申请日：2008-03-05

    申请人： NXP B.V. ,  BRUIN, Paulus, P., F., M.

    发明人： BRUIN, Paulus, P., F., M.

    IPC分类号： H03F1/30 ,  H03F3/45

    CPC分类号： H03F1/305 ,  H03F3/45183 ,  H03F3/68 ,  H03F2203/45344 ,  H03F2203/45466

    摘要： A signal processor comprises a reference voltage circuit (RVC) for imposing a reference voltage (VR) onto a capacitance (Cr). The reference voltage circuit (RVC) comprises a negative slope module (NSM) for providing a negative slope signal (SN), which has a magnitude that decreases when a voltage that is present on the capacitance (Cr) increases. A positive slope module (PSM) provides a positive slope signal (SP), which has a magnitude that increases when the voltage that is present on the capacitance (Cr) increases. A minimum selection module (MSM) controls a maximum current (IMX) that the reference voltage circuit (RVC) can apply to the capacitance (Cr) substantially in dependence on the negative slope signal (SN), if the magnitude of the negative slope signal (SN) is smaller than that of the positive slope signal (SP). The minimum selection module (MSM) controls the maximum current substantially in dependence on the positive slope signal (SP), if the magnitude of the positive slope signal (SP) is smaller than that of the negative slope signal (SN).

    摘要翻译： 信号处理器包括用于将参考电压（VR）施加到电容（Cr）上的参考电压电路（RVC）。 参考电压电路（RVC）包括用于提供负斜率信号（SN）的负斜率模块（NSM），当负载电容（Cr）上存在的电压增加时，其具有降低的幅度。 正斜率模块（PSM）提供正斜率信号（SP），其在存在于电容（Cr）上的电压增加时具有增加的幅度。 最小选择模块（MSM）基本上根据负斜率信号（SN）控制参考电压电路（RVC）可应用于电容（Cr）的最大电流（IMX），如果负斜率信号 （SN）小于正斜率信号（SP）的值。 如果正斜率信号（SP）的幅度小于负斜率信号（SN）的幅度，则最小选择模块（MSM）基本上根据正斜率信号（SP）来控制最大电流。

    STARTUP AND SHUTDOWN CLICK NOISE ELIMINATION FOR CLASS D AMPLIFIER
    7.
    发明申请
    STARTUP AND SHUTDOWN CLICK NOISE ELIMINATION FOR CLASS D AMPLIFIER 审中-公开
    D类放大器的启动和关闭消除噪声

    公开(公告)号：WO2008019122A2

    公开(公告)日：2008-02-14

    申请号：PCT/US2007/017460

    申请日：2007-08-07

    申请人： INTERNATIONAL RECTIFIER CORPORATION ,  STRYDOM, Johan Tjeerd ,  HONDA, Jun

    发明人： STRYDOM, Johan Tjeerd ,  HONDA, Jun

    IPC分类号： H03F3/217

    CPC分类号： H03F3/217 ,  H03F1/305

    摘要： A method of minimizing an audible click noise from a speaker in a Class D audio power amplifier upon shutdown or startup of a switching stage having two switches series connected at a node, the speaker being connected to the node via an output filter comprising an inductor and a capacitor, the switches being controlled by a controller. The method including the steps of determining a timing interval at the node to transition a peak voltage of the capacitor, the capacitor voltage being a speaker voltage; and eliminating the audible transient voltage excursion across the speaker that causes a click noise during the timing interval, wherein at startup ON and OFF times of the switches are incrementally increased from zero to a normal mode and at shutdown the ON OFF times of the switches are incrementally decreased from the normal mode to zero.

    摘要翻译： 一种用于在关闭或启动具有在节点处连接的两个开关串联的开关级时使来自D类音频功率放大器的扬声器的可听见咔哒噪声最小化的方法，所述扬声器连接到节点 经由包括电感器和电容器的输出滤波器，所述开关由控制器控制。 所述方法包括以下步骤：确定所述节点处的时序间隔以转变所述电容器的峰值电压，所述电容器电压是扬声器电压; 以及消除在定时间隔期间在扬声器两端引起卡嗒声的可听见的瞬态电压偏移，其中在开关的开启和关闭时间从零增加到正常模式并且在关闭时开关的开启关闭时间是 从正常模式递增地减少到零。

    INTELLIGENT RF POWER CONTROL FOR WIRELESS MODEM DEVICES
    8.
    发明申请
    INTELLIGENT RF POWER CONTROL FOR WIRELESS MODEM DEVICES 审中-公开
    智能无线调制解调器的射频功率控制

    公开(公告)号：WO2006071265A1

    公开(公告)日：2006-07-06

    申请号：PCT/US2005/021715

    申请日：2005-06-20

    申请人： SONY ERICSSON MOBILE COMMUNICATIONS AB ,  OSBORN, William, R.

    发明人： OSBORN, William, R.

    IPC分类号： H03F1/30

    CPC分类号： H03F1/0211 ,  H03F1/02 ,  H03F1/30 ,  H03F1/305 ,  H03F2200/447 ,  H03F2200/465 ,  H03F2200/468

    摘要： A system and method of optimizing the output power of a power amplifier to maintain satisfactory RF response under varying power amplifier operating conditions. The operating conditions include operating temperature, supply voltage, and operating frequency. Existing sensors monitor the aforementioned operating conditions (510, 520, 530). An application within the wireless device containing the power amplifier continuously or periodically logs the current operating conditions and finds them (540) in a look-up table (550) stored internally. The look-up table (550) is comprised of empirically derived maximum sustainable power output levels for each operating condition. Once the current operating conditions are matched to a set in the table, current power amplifier power output is reset, if necessary, to the maximum sustainable power output defined in the table (570).

    摘要翻译： 一种优化功率放大器的输出功率以在变化的功率放大器工作条件下保持令人满意的RF响应的系统和方法。 工作条件包括工作温度，电源电压和工作频率。 现有的传感器监视上述操作条件（510,520,530）。 包含功率放大器的无线设备内的应用连续地或周期地记录当前的操作条件，并将它们（540）发现在内部存储的查找表（550）中。 查找表（550）由经验导出的每个操作条件的最大可持续功率输出水平组成。 一旦当前工作条件与表中的一组匹配，当前的功率放大器功率输出将被复位，如果需要，可以设置为表中定义的最大可持续功率输出（570）。

    AUDIO AMPLIFICATION DEVICE WITH ANTIPOP CIRCUITRY
    9.
    发明申请
    AUDIO AMPLIFICATION DEVICE WITH ANTIPOP CIRCUITRY 审中-公开
    具有反向电路的音频放大器件

    公开(公告)号：WO2005081400A1

    公开(公告)日：2005-09-01

    申请号：PCT/EP2005/002365

    申请日：2005-02-18

    申请人： STMICROELECTRONICS SA ,  MARTY, Nicolas

    发明人： MARTY, Nicolas

    IPC分类号： H03F1/30

    CPC分类号： H03F1/305 ,  H03F3/185 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/186 ,  H03F2200/78

    摘要： An audio amplification device includes an input (11) for receiving an input audio signal (VIN) and an output (12) for delivering an output audio signal (VOUT) and an amplifier (OA1) comprising a differential pair of MOS transistors. The gate of the first transistor is coupled to the input of the device. The gate of the second MOS transistor receives a reference voltage (VREF) which takes the form of a rising ramp when the power is turned on. The drain of one of the transistors is coupled to the output. The amplifier also includes a biasing circuitry for biasing the bulk of the transistors to a first voltage level approximately equal to a supply voltage at the beginning of the reference voltage ramp, and to a second voltage level (V BB ) approximately equal to the voltage of their source (BB) at the end of the ramp. The generation of a pop is thus avoided when the power is turned on, while still benefiting from an optimum PSRR in the normal operation phase.

    摘要翻译： 音频放大装置包括用于接收输入音频信号（VIN）的输入端（11）和用于输出输出音频信号（VOUT）的输出（12）和包括差分MOS晶体管的放大器（OA1）。 第一晶体管的栅极耦合到器件的输入端。 第二MOS晶体管的栅极接收当电源接通时呈上升斜坡形式的参考电压（VREF）。 一个晶体管的漏极耦合到输出端。 放大器还包括偏置电路，用于将大部分晶体管偏置到大约等于参考电压斜坡开始时的电源电压的第一电压电平，以及大致等于它们的电压的第二电压电平（VBB） 源（BB）在斜坡的尽头。 因此在电源接通时避免产生爆音，同时在正常操作阶段仍从最佳PSRR中受益。

    POWER CONVERSION SYSTEM
    10.
    发明申请
    POWER CONVERSION SYSTEM 审中-公开
    电力转换系统

    公开(公告)号：WO2005036731A2

    公开(公告)日：2005-04-21

    申请号：PCT/IB2004003267

    申请日：2004-10-07

    申请人： BANG & OLUFSEN ICEPOWER AS ,  NIELSEN KARSTEN ,  FENGER LARS MICHAEL

    发明人： NIELSEN KARSTEN ,  FENGER LARS MICHAEL

    IPC分类号： H02J20060101 ,  H03F20060101 ,  H03F1/30 ,  H03F3/217 ,  H03F3/68 ,  H03F

    CPC分类号： H03F3/68 ,  H03F1/305 ,  H03F3/217 ,  H03F2200/03 ,  H03F2200/351

    摘要： A power conversion system comprising at least one Pulse Modulated Amplifier (1), including a pulse modulator for generating a pulse modulated signal based on a reference input (vi), a switching power stage arranged to amplify the pulse modulated signal, and a control system arranged to compensate for power supply voltage variations, and a voltage supply (2) providing drive voltage (Vs) to each amplifier, wherein said voltage supply (2) is provided with said input reference (vi), and arranged to provide a first drive voltage component (Vs) tracking an amplified absolute value of the input reference (vi). Pulse area modulation according to the invention will result in improved efficiency and at the same time ensure lower levels of EMI, as the mean amplitude of the PAM signal is lowered.

    摘要翻译： 一种功率转换系统，包括至少一个脉冲调制放大器（1），包括用于基于参考输入（vi）产生脉冲调制信号的脉冲调制器，布置成放大脉冲调制信号的开关功率级，和控制系统 布置成补偿电源电压变化;以及电压源（2），向每个放大器提供驱动电压（Vs），其中所述电压源（2）设置有所述输入参考（vi），并且被布置成提供第一驱动 跟踪输入参考值（vi）的放大绝对值的电压分量（Vs）。 随着PAM信号的平均幅度降低，根据本发明的脉冲区域调制将导致提高的效率并且同时确保较低的EMI水平。