公开(公告)号：WO2008075318A2

公开(公告)日：2008-06-26

申请号：PCT/IB2007/055279

申请日：2007-12-21

Applicant: BANG & OLUFSEN ICEPOWER A/S ,  NIELSEN, Ole Neis

Inventor： NIELSEN, Ole Neis

CPC classification number: H03F3/217 ,  H03F1/32 ,  H03F2200/03 ,  H03F2200/144 ,  H03F2200/351 ,  H03F2200/372 ,  H03M1/1033 ,  H03M1/822

Abstract: The present invention relates to a method for correcting for a source of non-linearity and noise introduced in a switching power amplification stage during power amplification of a pulse-modulated reference signal from a pulse modulator, where the method comprises the following steps: - providing an output stage embedded in an analogue self-oscillating control loop able to receive a pulse-referenced input signal; - generating a feedback signal from the switching power amplification stage or after a demodulation filter; - deriving an error signal by comparing the feedback signal with the reference signal; - filtering the error signal by a low pass filter for reducing the higher harmonics of the carrier; - adding a compensator for generating high loop gain in the audio band; - feeding the compensator output to a zero cross detector or comparator, thus providing a carrier for re-modulation or re-timing by feeding the filtered signal to a zero cross detector or comparator, which controls the output stage. The invention furthermore relates to various systems for implementing the above method.

Abstract translation: 本发明涉及用于校正在来自脉冲调制器的脉冲调制参考信号的功率放大期间在开关功率放大级中引入的非线性和噪声源的方法，其中该方法包括以下步骤： - 提供 嵌入在能够接收脉冲参考输入信号的模拟自振荡控制环路中的输出级; - 从开关功率放大级产生反馈信号或在解调滤波器之后产生反馈信号; - 通过将反馈信号与参考信号进行比较来导出误差信号; - 通过低通滤波器对误差信号进行滤波，以降低载波的高次谐波; - 添加一个用于在音频带中产生高回路增益的补偿器; - 将补偿器输出馈送到零交叉检测器或比较器，从而通过将滤波后的信号馈送到控制输出级的零交叉检测器或比较器来提供用于重新调制或重新定时的载波。 本发明还涉及用于实现上述方法的各种系统。

公开(公告)号：US10256780B2

公开(公告)日：2019-04-09

申请号：US15556449

申请日：2016-03-08

Applicant: ICEpower a/s

Inventor： Kennet Skov Anderson

IPC: H03F3/38 ,  H03F3/217 ,  H03F3/181 ,  H03F1/52

Abstract: A power conversion system comprising an amplifier input for receiving an analog input signal and an amplifier output for providing a switching output signal is disclosed. The system is applicable for use in high definition switching audio amplification. The power conversion system further comprises a clipper for clipping the analog input signal having a predefined range limited by a clipping level, a pulse modulator and a switching power stage. The system further has a feedback path to the clipper including a duty cycle measuring unit and a clip level filter which generates a clip level signal and where the clipping level of the clipper is controlled by the clip level signal. Hereby it is e.g. possible to clip an analog input signal with good precision and reliability in a switching power conversion system.

公开(公告)号：US10164581B2

公开(公告)日：2018-12-25

申请号：US15525182

申请日：2015-11-27

Applicant: ICEpower a/s

Inventor： Kennet Skov Andersen

IPC: H03F1/26 ,  H03F3/217 ,  H03F3/183

Abstract: A self-oscillating amplifier system is disclosed. The system comprises a pulse modulator, a switching power amplification stage and a demodulation filter. Moreover, the system comprises a compensator including a forward filter which is a high order filter including a second order pole pair and a second order zero pair. Hereby it is possible to decrease the phase turn at low frequencies for better stability and increasing the gain of the control loop within the desired bandwidth.

公开(公告)号：US20180145649A1

公开(公告)日：2018-05-24

申请号：US15577215

申请日：2016-06-01

Applicant: ICEPOWER A/S

Inventor： Kennet SKOV ANDERSEN ,  Eskil JØRGENSEN

IPC: H03F3/217 ,  H03K17/16 ,  H03K5/151

CPC classification number: H03F3/2171 ,  H03K5/1515 ,  H03K17/162

Abstract: The invention relates to a compensator device for compensating signal dependent delay variations, including dead time and reverse recovery time, causing un-linearity in a Class-D amplifier where the compensator device comprises: a first input terminal for receiving an input pulse width modulated input PWM signal comprising pulses with falling flanks corresponding to a falling level transition and rising flanks corresponding to a rising level transition; and a second input terminal configured to receive the signal provided at an output switching node of a Class-D amplifier; an output terminal for providing a compensated output signal; and controllable delay means configured to receive and delay the pulse modulated input signal, thereby providing a delayed version of the input signal to said output terminal of the compensator device. The compensator device further comprises time measuring means configured for measuring the time between a transition of the signal provided at the output terminal of the compensator device and the corresponding transition of the signal at the output switching node of a Class-D amplifier and based on these measurements providing a control signal to the controllable delay means. An advantageous effect of the present invention is that the rising and falling level transition delays will be substantially similar thus substantially removing non-linearity and obtaining substantially correct pulse widths. The invention further relates to a corresponding method, a driver device and a Class-D amplifier.

公开(公告)号：WO2012172007A1

公开(公告)日：2012-12-20

申请号：PCT/EP2012/061334

申请日：2012-06-14

Applicant: BANG & OLUFSEN ICEPOWER A/S ,  FRIUM, Mads Peter

Inventor： FRIUM, Mads Peter

IPC: H02M3/335

CPC classification number: H02M3/33576 ,  H02M3/33569 ,  H02M2001/0058 ,  H03F3/217 ,  H03F3/2173 ,  Y02B70/1491

Abstract: A power converter with positive and negative supply rails outputs (7, 8) for feeding a single ended class D amplifier, the converter comprising a transformer arrangement (2), a supply pump reduction arrangement (4) connected between the secondary windings and the positive and negative supply rail outputs, and a boost drive mode switching arrangement (5). A controller (3) is adapted to control the power converter in a negate drive mode and a boost drive mode, wherein the output voltage in the bost mode is increased by means of the transformer and the boost drive mode switching arrangement. The output voltages on the positive and negative rails can be generated at two different output voltage levels without changing the duty cycle or dead time of the control signals.

Abstract translation: 一种具有用于馈送单端D类放大器的正和负电源轨输出（7,8）的功率转换器，该转换器包括变压器装置（2），连接在次级绕组和正极之间的供应泵减速装置（4） 和负电源轨输出，以及升压驱动模式切换装置（5）。 控制器（3）适于在非驱动模式和升压驱动模式下控制功率转换器，其中通过变压器和升压驱动模式切换装置增加波特率模式中的输出电压。 正负极轨上的输出电压可以在两个不同的输出电压电平下产生，而不会改变控制信号的占空比或死区时间。

公开(公告)号：WO2007093903A1

公开(公告)日：2007-08-23

申请号：PCT/IB2007/000374

申请日：2007-02-16

Applicant: BANG & OLUFSEN ICEPOWER A/S ,  NIELSEN, Karsten ,  HANSEN, Lars, Brandt, Rosendahl

Inventor： NIELSEN, Karsten ,  HANSEN, Lars, Brandt, Rosendahl

IPC: H04R1/28 ,  H04R9/02 ,  H04R7/12

CPC classification number: H04R9/025 ,  H04R1/22 ,  H04R7/125 ,  H04R2307/027 ,  H04R2400/11 ,  H04R2499/11

Abstract: The typical micro-transducer dedicated for mobile phones and headphones produces at high output in small back enclosure significant distortion in the acoustical output. These typical micro-transducers are designed for very high sensitivity and their mechanical suspension compliances are designed for worst case scenario, free air environment or a very large back enclosure (were the air stiffness from the back enclosure is much lower than the mechanical transducer suspension stiffness). This leads to poor low frequency response, high distortion, non-linear SPL characteristic and unnecessary high system resonance fre- quency when the transducer is placed in a small back enclosure. The Soft Suspension Long throw (SSL) micro-transducer has been designed with an improved non-circular shaped magnetic system, a low density/high Young's modulus thermal conducting diaphragm, a large-area non-circularly shaped diaphragm area, a non-circular shaped voice coil and a soft long-throw suspension which has been designed so that the SSL micro-transducer only functions properly when mounted in a small back enclosure. The combination of these inventions leads to a transducer architecture offering significant improvements in overall distortion, high RMS power handling, extended bass reproduction, also in compact volumes, and an overall flat frequency response. The combined result of several inventions is a significant overall improvement in perceived sound quality.

Abstract translation: 专用于手机和耳机的典型微型换能器在小背部高输出端产生声输出中的显着失真。 这些典型的微型换能器设计用于非常高的灵敏度，并且它们的机械悬架一致性被设计用于最坏的情况，自由空气环境或非常大的后部外壳（来自后部外壳的空气刚度远低于机械传感器悬架刚度 ）。 当传感器放置在小后箱中时，这导致差的低频响应，高失真，非线性SPL特性和不必要的高系统谐振频率。 软悬挂长投（SSL）微型换能器设计有改进的非圆形磁系统，低密度/高杨氏模量导热隔膜，大面积非圆形隔膜面积，非圆形 形状的音圈和软长悬挂悬挂，其设计使得SSL微型换能器仅在安装在小后箱中时才能正常工作。 这些发明的组合导致了传感器架构，其在整体失真，高RMS功率处理，扩展低音再现以及紧凑体积以及整体平坦频率响应方面都有显着改进。 几个发明的综合结果是感知音质的显着整体提高。

公开(公告)号：WO2003055060A1

公开(公告)日：2003-07-03

申请号：PCT/IB2002/005412

申请日：2002-12-16

Applicant: BANG & OLUFSEN ICEPOWER A/S ,  NIELSEN, Karsten ,  LIND HANSEN, Jesper

Inventor： NIELSEN, Karsten ,  LIND HANSEN, Jesper

IPC: H03F3/38

CPC classification number: H03F3/217 ,  H02M3/1584 ,  H03F2200/351

Abstract: A synchronized controlled oscillation modulator (SCOM) , comprising at least one, Controlled Oscillation Modulator (5) , and synchronizing means (1, 6) connected to said COM modulator. The modulator can comprise several COM modulators, and the synchronizing means can be arranged between the COM systems, so that the oscillation modulator signal is used as synchronization signal. The invention provides significant advantages in performance, topological simplification, improved robustness, stability and efficiency compared to prior art.

Abstract translation: 一种同步控制振荡调制器（SCOM），包括至少一个控制振荡调制器（5）和连接到所述COM调制器的同步装置（1,6）。 调制器可以包括几个COM调制器，并且同步装置可以被布置在COM系统之间，使得振荡调制器信号被用作同步信号。 与现有技术相比，本发明在性能，拓扑简化，改进的鲁棒性，稳定性和效率方面提供了显着的优点。

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

Applicant: BANG & OLUFSEN ICEPOWER A/S

Inventor： SKOV ANDERSEN, Kennet

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

CPC classification number: 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

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2008075306A1

公开(公告)日：2008-06-26

申请号：PCT/IB2007/055247

申请日：2007-12-20

Applicant: BANG & OLUFSEN ICEPOWER A/S ,  NIELSEN, Ole Neis

Inventor： NIELSEN, Ole Neis

IPC: H03F3/217 ,  H03F1/52

CPC classification number: H03F3/217 ,  H03F1/52

Abstract: The invention relates to a current limiting method, e. g. for Class D amplifiers comprising a unique detection- and control method. The current detection circuit can be implemented as a voltage measurement where the measured voltage corresponds to the current flowing through the power-switching device. The device can be switched OFF when a set limit is reached. By forcing certain OFF time, the associated control system behaves as a self-oscillating current limiting circuit. This can be implemented locally close to the switching device and be independent of other local or global control systems.

Abstract translation: 本发明涉及限流方法，例如， G。 用于D类放大器，其包括独特的检测和控制方法。 电流检测电路可以实现为电压测量，其中测量的电压对应于流过功率开关器件的电流。 达到设定限制后，该设备可以关闭。 通过强制某些OFF时间，相关的控制系统表现为自振电流限制电路。 这可以在本地靠近开关装置实现并且独立于其它本地或全局控制系统。

公开(公告)号：WO2007099442A1

公开(公告)日：2007-09-07

申请号：PCT/IB2007/000493

申请日：2007-03-02

Applicant: BANG & OLUFSEN ICEPOWER A/S ,  NIELSEN, Karsten ,  LJUSEV, Petar

Inventor： NIELSEN, Karsten ,  LJUSEV, Petar

IPC: H03F3/217

CPC classification number: H03F3/217 ,  H03F2200/03

Abstract: A Hybrid feedback Controlled Oscillation Modulator (HCOM) has a 1 st feedback path from the output voltage of the switching stage Vp and a second feedback path from the filter output Vo, the two feedback paths superposed to provide a weighted state feedback signal Vf. Said state feedback path signal is subtracted from the input signal to form an error signal, said error signal filtered by a forward path compensation block B(s), closing the loop by feeding said pulse modulator, said loop having a transfer function such that self-oscillation can be established in the closed loop system. In a preferred embodiment, the first feedback path has a low pass characteristic and the second feedback path lead characteristic, the first feedback path being weighted by a weighting factor β. Further embodiments include a pure passive realization without forward path means B(s) and the application of 3rd feedback loops to enhance global amplifier performance.

Abstract translation: 混合反馈控制振荡调制器（HCOM）具有来自开关级Vp的输出电压的第一反馈路径和来自滤波器输出Vo的第二反馈路径，所述两个反馈路径被叠加以提供 加权状态反馈信号Vf。 所述状态反馈路径信号从输入信号中减去以形成误差信号，所述误差信号由正向路径补偿块B滤波，通过馈送所述脉冲调制器来闭合回路，所述回路具有传递函数，使得自身 可以在闭环系统中建立振荡。 在优选实施例中，第一反馈路径具有低通特性和第二反馈路径引线特性，第一反馈路径由加权因子β加权。 其他实施例包括没有正向路径装置B的纯无源实现以及第三反馈环路的应用以增强全局放大器性能。