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公开(公告)号：WO2008072212A1
公开(公告)日：2008-06-19
申请号：PCT/IB2007/055121
申请日：2007-12-14
Applicant: BANG & OLUFSEN ICEPOWER A/S , ANDERSEN, Kennet Skov
Inventor： ANDERSEN, Kennet Skov
CPC classification number: H03F3/217 , H03F1/305 , Y10T307/707 , Y10T307/74 , Y10T307/766
Abstract: The invention relates to a pop reduction system for a switching power conversion system (0, 1 ), which system comprises an analogue control system (0) and a switching power stage (1), where the pop reduction system comprises an extra power stage (2), controllable means (3) for establishing or eliminating an extra signal path from the output of said control system (0) via said extra power stage (2) to the output terminal of said switching power conversion system (0, 1 } and control means (34) for controlling said controllable means (3), whereby establishing or elimination of said extra signal path is attained. The invention furthermore relates to a corresponding method for pop reduction and generally to amplifier systems comprising the pop reduction system according to the invention,
Abstract translation: 本发明涉及一种用于开关电力转换系统（0,1）的弹跳减少系统，该系统包括模拟控制系统（0）和开关功率级（1），其中弹出减少系统包括额外的功率级（ 2），用于建立或消除从所述控制系统（0）的输出经由所述额外功率级（2）到所述开关功率转换系统（0,1）的输出端的额外信号路径的可控装置（3）和 控制装置（34），用于控制所述可控制装置（3），从而达到建立或消除所述额外的信号路径。本发明还涉及一种用于弹出缩减的通常对放大器系统的方法，该系统包括根据 发明，
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公开(公告)号：WO2005036731A3
公开(公告)日：2005-04-21
申请号：PCT/IB2004/003267
申请日：2004-10-07
Applicant: BANG & OLUFSEN ICEPOWER A/S , NIELSEN, Karsten , FENGER, Lars, Michael
Inventor： NIELSEN, Karsten , FENGER, Lars, Michael
IPC: H03F3/217
Abstract: 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 (v i ), 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 (V s ) to each amplifier, wherein said voltage supply (2) is provided with said input reference (v i ), and arranged to provide a first drive voltage component (V s ) tracking an amplified absolute value of the input reference (v i ). 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.
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公开(公告)号：WO2002093973A1
公开(公告)日：2002-11-21
申请号：PCT/IB2002/001668
申请日：2002-05-16
Applicant: BANG & OLUFSEN ICEPOWER A/S , NIELSEN, Karsten
Inventor： NIELSEN, Karsten
IPC: H04R1/00
CPC classification number: H04R3/00 , H03F3/2173
Abstract: The present invention relates to an apparatus for converting an audio signal from a source (25) into audio waves, comprising a modulator (17), for modulating said audio signal, an amplifying switching stage (15), for amplifying a modulated audio signal supplied from the modulator, and a transducer (19). The transducer is connected directly to the switching stage, and is arranged to convert a pulse train from the switching stage into audio waves. Further, the modulator, the switching stage and the conversion means are integrated mechanically and electrically in one operational unit, being connectable directly to a mains power supply (12). By this electrical integration, no separate filtering is required, but instead the inherent qualities of the transducer are used for accomplishing filtering of the pulse train.
Abstract translation: 本发明涉及一种用于将来自源（25）的音频信号转换成音频波的装置，包括用于调制所述音频信号的调制器（17），放大开关级（15），用于放大所提供的调制音频信号 和调制器（19）。 传感器直接连接到开关级，并且被布置成将来自开关级的脉冲串转换成音频波。 此外，调制器，开关级和转换装置机械和电气地集成在一个操作单元中，可直接连接到主电源（12）。 通过这种电气集成，不需要单独的滤波，而是用传感器的固有特性来完成脉冲串的滤波。
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公开(公告)号：EP4102717A1
公开(公告)日：2022-12-14
申请号：EP21178181.0
申请日：2021-06-08
Applicant: ICEpower a/s
Inventor： BOSTRÖM, Patrik
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 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 of an initial integrator stage and the output of a final integrator stage, 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.-
公开(公告)号：EP3281293A1
公开(公告)日：2018-02-14
申请号：EP16708422.7
申请日：2016-03-08
Applicant: ICEPOWER A/S
Inventor： SKOV ANDERSEN, Kennet
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.
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Patent Agency Ranking
公开(公告)号：EP3231086A1
公开(公告)日：2017-10-18
申请号：EP15801434.0
申请日：2015-11-27
Applicant: ICEPOWER A/S
Inventor： SKOV ANDERSEN, Kennet
IPC: H03F3/217
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.
Abstract translation: 公开了一种自激振荡放大器系统。 该系统包括脉冲调制器，开关功率放大级和解调滤波器。 此外，该系统包括补偿器，该补偿器包括正向滤波器，该正向滤波器是包括二阶极对和二阶零对的高阶滤波器。 由此可以减小低频处的相位转向以获得更好的稳定性并且增加控制环路在期望带宽内的增益。
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公开(公告)号：EP3224945A1
公开(公告)日：2017-10-04
申请号：EP15790517.5
申请日：2015-11-02
Applicant: ICEPOWER A/S
Inventor： SKOV ANDERSEN, Kennet
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: 公开了一种关闭式流行音降低系统和一种用于音频放大器组件中的关闭式流行音降低的方法。 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中的比较器的输出到序列控制单元的信号路径。 信号路径包括配置成提供定时信号的关闭定时电路。 顺序控制单元被配置为在开关功率级的PWM脉冲内的时刻消除输入信号，增加关闭爆弹减少系统的开关频率并且禁用开关功率级。 因此，它是例如 可以在关闭音频放大器组件时尽量减少可听见的弹出。
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公开(公告)号：EP2092639A1
公开(公告)日：2009-08-26
申请号：EP07859471.0
申请日：2007-12-20
Applicant: Bang & Olufsen IcePower A/S
Inventor： NIELSEN, Ole Neis
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.
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公开(公告)号：US10148235B2
公开(公告)日：2018-12-04
申请号：US15577215
申请日：2016-06-01
Applicant: ICEPOWER A/S
Inventor： Kennet Skov Andersen , Eskil Jørgensen
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.
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公开(公告)号：US09991852B2
公开(公告)日：2018-06-05
申请号：US15528934
申请日：2015-11-02
Applicant: ICEpower a/s
Inventor： Kennet Skov Andersen
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.
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