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：US09030261B2

公开(公告)日：2015-05-12

申请号：US14115371

申请日：2012-06-14

Applicant: Mads Peter Frium

Inventor： Mads Peter Frium

IPC: H03F3/04 ,  H02M3/335 ,  H03F3/217 ,  H02M1/00

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

Abstract: A power converter with positive and negative supply rail outputs for feeding a single ended class D amplifier, the converter comprising a transformer arrangement, a supply pump reduction arrangement connected between the secondary windings and the positive and negative supply rail outputs, and a boost drive mode switching arrangement. A controller is adapted to control the power converter in a negate drive mode and a boost drive mode, wherein the output voltage in the boost 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: 一种具有正和负电源轨输出的功率转换器，用于馈送单端D类放大器，转换器包括变压器布置，连接在次级绕组与正和负电源轨输出之间的供应泵减速装置，以及升压驱动模式 切换布置。 控制器适于在负驱动模式和升压驱动模式下控制功率转换器，其中升压模式中的输出电压通过变压器和升压驱动模式切换装置增加。 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：US07839211B2

公开(公告)日：2010-11-23

申请号：US12519855

申请日：2007-12-21

Applicant: Ole Neis Nielsen

Inventor： Ole Neis Nielsen

IPC: H03F3/38

CPC classification number: G06F21/10 ,  G06F2221/0759 ,  H03F1/32 ,  H03F3/217 ,  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: 本发明涉及一种用于校正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; - 通过将反馈信号与参考信号进行比较来产生误差信号; - 通过低通滤波器滤除误差信号，以降低载波的高次谐波; - 添加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，从而通过将经滤波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：US20090257599A1

公开(公告)日：2009-10-15

申请号：US12385528

申请日：2009-04-10

Applicant: Bjorn Sand Jensen ,  Mads Emil Solgaard

Inventor： Bjorn Sand Jensen ,  Mads Emil Solgaard

IPC: H03G11/00

CPC classification number: H03G3/301 ,  H03F1/52 ,  H03F2200/03 ,  H03F2200/426 ,  H04R9/022

Abstract: Electro dynamic transducers can fail due to either excessive voice coil excursion, causing mechanical clipping, or by overheating of the voice coil causing degradation of the materials. The disclosed invention relates to protection against excess voice coil temperature in such transducers. The current through the transducer voice coil and the voltage across its terminals, are measured. The resistive part of the impedance of the transducer is then estimated based on the measurements of current and voltage. When the resistive impedance for the given type of transducer is well known at one temperature it is then possible to calculate the temperature when the resistive impedance changes. The estimated voice coil temperature is then fed to a signal attenuator or controller, which attenuates the output signal to the transducer.

Abstract translation: 由于过度的音圈偏移，导致机械夹紧，或由于音圈的过热导致材料的劣化，电动传感器会失效。 所公开的本发明涉及在这种换能器中防止多余音圈温度的保护。 通过传感器音圈的电流和其端子两端的电压进行测量。 然后基于电流和电压的测量来估计换能器的阻抗的电阻部分。 当给定类型的换能器的电阻阻抗在一个温度下是众所周知的时候，可以计算电阻阻抗变化时的温度。 然后将估计的音圈温度馈送到信号衰减器或控制器，该信号衰减器或控制器衰减到换能器的输出信号。

公开(公告)号：US10326415B2

公开(公告)日：2019-06-18

申请号：US15991321

申请日：2018-05-29

Applicant: ICEpower A/S

Inventor： Patrik Boström ,  Martin Persson

IPC: H03F3/38 ,  H03F3/217 ,  H03F3/183 ,  H03F1/02 ,  H03F1/08

Abstract: A new and improved self-oscillating amplifier system is presented, suitable for use in high fidelity audio applications. The self-oscillating amplifier system comprises a feedback path and a forward path including a pulse modulator, a switching power amplification stage and a demodulation filter. The forward path further includes a pair of parallel forward filters preceding the pulse modulators, a differentiating forward filter and an integrating forward filter. The differentiating forward filter is utilized for controlling a switching frequency of the system while the integrating forward filter is utilized for controlling the behavior of the amplifier system within an operating frequency band (e.g. audio band). The self-oscillating amplifier system exhibits improved performance in terms of open loop gain, reduced phase turn and improved robustness as compared to other previously known self-oscillating amplifier systems.

公开(公告)号：US10050589B2

公开(公告)日：2018-08-14

申请号：US15528927

申请日：2015-09-24

Applicant: ICEpower a/s

Inventor： Kennet Skov Andersen ,  Eskil Jørgensen

IPC: H03F1/30 ,  H03F3/183 ,  H03F3/217

Abstract: A switching power conversion system and a method for start-up pop minimization in an audio amplifier assembly are disclosed. The switching power conversion system comprises a forward path including a compensator, a switching power stage and a demodulation filter. The system further comprises a DC-servo and a pre-charging circuit and a sequence control unit configured for providing a start-up sequence where the compensator and DC-servo are correctly biased and a bootstrap capacitor within the switching power stage is charged before the switching power stage is started. Hereby, it is e.g. possible to minimize the audible start-up pop in audio amplifier assemblies.

公开(公告)号：US20180054173A1

公开(公告)日：2018-02-22

申请号：US15556449

申请日：2016-03-08

Applicant: ICEpower a/s

Inventor： Kennet Skov Anderson

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

CPC classification number: H03F3/2173 ,  H03F1/523 ,  H03F3/181 ,  H03F3/217 ,  H03F3/2175 ,  H03F2200/03 ,  H03F2200/66

Abstract: A power conversion system comprising an amplifier input for receiving an analogue 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 analogue 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 analogue input signal with good precision and reliability in a switching power conversion system.

公开(公告)号：US08013678B2

公开(公告)日：2011-09-06

申请号：US12224542

申请日：2007-03-02

Applicant: Karsten Nielsen ,  Petar Ljusev

Inventor： Karsten Nielsen ,  Petar Ljusev

IPC: H03F3/217

CPC classification number: H03F3/217 ,  H03F2200/03

Abstract: A Hybrid feedback Controlled Oscillation Modulator (HCOM) is disclosed, having a 1st feedback path from the output voltage of the switching stage and a second feedback path from the filter output, the two feedback paths being superposed to provide a weighted state feedback signal. The state feedback path signal is subtracted from the input signal to form an error signal, the error signal filtered by a forward path compensation block B(s), closing the loop by feeding the pulse modulator, the loop having a transfer function such that self-oscillation can be established in the closed loop system. In an example 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 a forward path device and the application of 3rd feedback loops to enhance global amplifier performance.

Abstract translation: 公开了一种混合反馈控制振荡调制器（HCOM），其具有来自开关级的输出电压的第一反馈路径和来自滤波器输出的第二反馈路径，所述两个反馈路径被叠加以提供加权状态反馈信号。 从输入信号中减去状态反馈路径信号以形成误差信号，由正向路径补偿块B滤波的误差信号，通过馈送脉冲调制器闭合回路，该回路具有传递函数，使得自身 可以在闭环系统中建立振荡。 在示例实施例中，第一反馈路径具有低通特性和第二反馈路径引导特性，第一反馈路径被加权因子＆bgr加权。 另外的实施例包括没有正向路径设备的纯无源实现和第三反馈环路的应用以增强全局放大器性能。

公开(公告)号：US06963189B2

公开(公告)日：2005-11-08

申请号：US10498565

申请日：2002-12-05

Applicant: Karsten Nielsen ,  Kennet Skov Andersen

Inventor： Karsten Nielsen ,  Kennet Skov Andersen

IPC: H03F3/217 ,  H03G3/10 ,  G05F1/40

CPC classification number: H03F3/2175

Abstract: This invention relates to an attenuation control system (9) in a switching power conversion system comprising a digital modulator (4), for generating a modulated control signal from a (digital) source signal and a switching power state (6), said attenuation control system comprising: means for digitally attenuating the modulated signal, first gain shifting means (7) for shifting a supply voltage of said power stage between a plurality of predefined voltage levels, said first gain shifting means being arranged to decrease the power stage gain when the attenuation of the modulated signal exceeds a predefined level. This invention also relates to an attenuating method in a switching power conversion system comprising a digital modulator, for generating a modulated control signal from a (digital) source signal, and a switching power stage.

Abstract translation: 本发明涉及一种包括数字调制器（4）的开关电源转换系统中的衰减控制系统（9），用于从（数字）信号源和开关功率状态（6）产生调制控制信号，所述衰减控制 系统，包括：用于数字衰减所述调制信号的装置，用于在多个预定电压电平之间移动所述功率级的电源电压的第一增益移位装置，所述第一增益偏移装置被布置为当所述功率级增益 调制信号的衰减超过预定义的水平。 本发明还涉及一种开关电源转换系统中的衰减方法，包括用于从（数字）源信号和开关功率级产生调制控制信号的数字调制器。

公开(公告)号：US20240243704A1

公开(公告)日：2024-07-18

申请号：US18562680

申请日：2022-06-02

Applicant: ICEPOWER A/S

Inventor： Patrik BOSTRÖM

IPC: H03F3/183

CPC classification number: H03F3/183 ,  H03F2200/03 ,  H03F2200/171

Abstract: A self-oscillating amplifier system comprising at least two integrator stages connected to receive an input signal and provide a reference signal, a comparator configured to provide a modulation signal based on the reference 5 signal and a modulation feedback signal, and a switching stage connected to form a switching output signal. The system further comprises a voltage limiting circuit connected between the input signal and the reference signal, for limiting a voltage across the at least two integrator stages. By connecting one single voltage limiting circuit across all integrator stages, the modulation signal will be limited to the voltage limit of this voltage limiting circuit.