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公开(公告)号：EP2127071A2
公开(公告)日：2009-12-02
申请号：EP07859499.1
申请日：2007-12-21
Applicant: Bang & Olufsen IcePower A/S
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.
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公开(公告)号：EP1456943B8
公开(公告)日：2009-01-07
申请号：EP02805443.5
申请日：2002-12-05
Applicant: Bang & Olufsen IcePower A/S
Inventor： NIELSEN, Karsten , SKOV ANDERSEN, Kennet
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 stage (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.
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公开(公告)号：EP1606885A1
公开(公告)日：2005-12-21
申请号：EP04722600.6
申请日：2004-03-23
Applicant: Bang & Olufsen IcePower A/S
Inventor： NIELSEN, OLe, Nies
IPC: H03M5/08
CPC classification number: H03M5/08 , H03M3/506 , H03M7/3004 , H03M7/3028 , H03M7/304
Abstract: A pulse width modulator (10) for converting a digital signal into a PWM signal, comprising a plurality of integrators (11) with integrator gains (12) arranged in series, a comparator (17) for comparing the output of the last integrator (11') with a reference, and thereby creating the PWM signal. The modulator further has means (13) for realizing self-oscillation at a desired switching frequency, and a feedback path (14) connected to a point down stream said comparator and leading to a plurality of summing points, each preceding one of said integrators, wherein the PWM signal is quantized in time by the clock frequency of the modulator, and wherein the integrator gains (12) are adapted to reduce any quantization noise.
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公开(公告)号：WO2022258491A1
公开(公告)日：2022-12-15
申请号：PCT/EP2022/065100
申请日：2022-06-02
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, acomparator configured to provide a modulation signal based on the reference 5signal 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.
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公开(公告)号：WO2016198443A1
公开(公告)日：2016-12-15
申请号：PCT/EP2016/063020
申请日：2016-06-08
Applicant: ICEPOWER A/S
Inventor： JØRGENSEN, Eskil
CPC classification number: H03F3/2173 , G01K7/42 , G01R31/3606 , H03F1/523 , H03F2200/447
Abstract: The invention relates to a precise fast temperature measuring system for a switching power conversion systems in general and more specifically Class D power amplifiers, where the power conversion system comprises a switching device, and a temperature sensor (18, 34, 59) providing a temperature signal and means (20; 54, 55, 56, 57, 58) for differentiating the temperature signal from the temperature sensor, such that the temperature of the switching element can be determined as a sum of the sensor temperature signal and a constant times the time derivative of the sensor temperature signal. The invention further relates to a gate driver in which the fast temperature measuring system is applied and to a method for precise and fast temperature measurements in switching power conversion systems and devices.
Abstract translation: 本发明涉及用于一般的开关电源转换系统的精确的快速温度测量系统，更具体地说是D类功率放大器，其中功率转换系统包括开关装置，以及温度传感器（18,39,59），其提供温度 信号和装置（20; 54,55,56,57,58），用于区分来自温度传感器的温度信号，使得开关元件的温度可以被确定为传感器温度信号和恒定时间的和 传感器温度信号的时间导数。 本发明还涉及一种其中应用了快速温度测量系统的栅极驱动器以及用于开关功率转换系统和装置中精确和快速的温度测量的方法。
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Patent Agency Ranking
公开(公告)号：WO2016198302A1
公开(公告)日：2016-12-15
申请号：PCT/EP2016/062399
申请日：2016-06-01
Applicant: ICEPOWER A/S
Inventor： SKOV ANDERSEN, Kennet , JØRGENSEN, Eskil
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.
Abstract translation: 本发明涉及一种补偿装置，用于补偿信号相关的延迟变化，包括死区时间和反向恢复时间，导致D类放大器的非线性，其中补偿器装置包括：第一输入端，用于接收输入脉宽调制输入 PWM信号包括具有对应于下降电平转变的下降侧面的脉冲和对应于上升电平转变的上升侧面; 以及第二输入端子，被配置为接收设置在D类放大器的输出开关节点处的信号; 用于提供经补偿的输出信号的输出端; 以及可控延迟装置，其被配置为接收和延迟所述脉冲调制输入信号，从而将所述输入信号的延迟版本提供给所述补偿器装置的所述输出端。 补偿装置还包括时间测量装置，其被配置为测量在补偿装置的输出端提供的信号的转变与D类放大器的输出开关节点处的信号的相应转变之间的时间，并且基于这些 向可控延迟装置提供控制信号的测量。 本发明的有益效果是上升和下降电平转换延迟将基本相似，从而基本上去除非线性并获得基本上正确的脉冲宽度。 本发明还涉及相应的方法，驱动器装置和D类放大器。
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公开(公告)号：WO2016162156A1
公开(公告)日：2016-10-13
申请号：PCT/EP2016/054893
申请日：2016-03-08
Applicant: BANG & OLUFSEN 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.
Abstract translation: 公开了一种包括用于接收模拟输入信号的放大器输入和用于提供开关输出信号的放大器输出的功率转换系统。 该系统适用于高清晰度切换音频放大。 功率转换系统还包括用于限幅模拟输入信号的限幅器，该模拟输入信号具有由限幅电平限制的预定范围，脉冲调制器和开关功率级。 该系统还具有一个到裁剪器的反馈路径，其中包括一个占空比测量单元和一个剪辑电平滤波器，该滤波器产生一个剪辑电平信号，其中剪辑器的限幅电平由剪辑电平信号控制。 因此，例如 可能在开关电源转换系统中夹具具有良好的精度和可靠性的模拟输入信号。
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公开(公告)号：WO2012160021A1
公开(公告)日：2012-11-29
申请号：PCT/EP2012/059363
申请日：2012-05-21
Applicant: BANG & OLUFSEN ICEPOWER A/S , FRIUM, Mads Peter
Inventor： FRIUM, Mads Peter
CPC classification number: H02M3/33569 , H02M2001/0006 , H03F3/185 , H03F3/217 , H03F3/2171
Abstract: A power supply arrangement for a single ended class D amplifier (1), including a first primary winding (7) connected in series with a first switch (8) between the positive supply rail and ground, a second primary winding (9) in phase with said first primary winding and connected in series with a second switch (10) between the negative supply rail and ground, and a controller (15) adapted to apply a control signal to said first and second switches, said control signal (Q) having ON-pulses of a predefined pulse time (pt) separated by a dead time (dt). In use, the primary winding connected to the supply rail with the highest numerical voltage will transform the rail voltage difference to the supply rail with the lowest numerical voltage through the opposite primary winding thus reducing any voltage unbalance between the windings.
Abstract translation: 一种用于单端D类放大器（1）的电源装置，包括与正电源轨和地之间的第一开关（8）串联连接的第一初级绕组（7），同相的第二初级绕组（9） 所述第一初级绕组与负电源轨和地之间的第二开关（10）串联连接，以及适于向所述第一和第二开关施加控制信号的控制器（15），所述控制信号（Q）具有 以死区时间（dt）分隔的预定脉冲时间（pt）的ON脉冲。 在使用中，连接到具有最高数值电压的电源轨的初级绕组将通过相对的初级绕组将轨电压差转换为具有最低数值电压的电源轨，从而减少绕组之间的任何电压不平衡。
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公开(公告)号：WO2008072182A2
公开(公告)日：2008-06-19
申请号：PCT/IB2007/055023
申请日：2007-12-11
Applicant: BANG & OLUFSEN ICEPOWER A/S , KRAGH, Morten , NIELSEN, Ole Neis
Inventor： KRAGH, Morten , NIELSEN, Ole Neis
IPC: H03K7/08
Abstract: The present invention relates to the application of a free-tunning clock signal in a pulse- width modulator (PWM) Specifically there is disclosed an integrated circuit comprising a pulse-width modulator (2) for converting an input signal (6) into a pulse-width-modulated signal (8), the pulse-width modulator (2) being clocked by a clock signal (4) generated by a clock generator (3) which generates a free-running clock signal In a preferred embodiment of the invention, the clock generator (3) is provided in the same integrated circuit (1), such as a chip, as the digital pulse-width modulator (2).
Abstract translation: 本发明涉及在脉冲宽度调制器（PWM）中应用自由调谐时钟信号。具体地，公开了一种集成电路，其包括用于将输入信号（6）转换成脉冲的脉冲宽度调制器（2） 宽度调制信号（8），脉冲宽度调制器（2）由时钟发生器（3）产生的时钟信号（4）进行计时，时钟信号产生自由运行的时钟信号。在本发明的优选实施例中， 时钟发生器（3）作为数字脉冲宽度调制器（2）设置在与芯片相同的集成电路（1）中。
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公开(公告)号：WO2007096761A1
公开(公告)日：2007-08-30
申请号：PCT/IB2007/000450
申请日：2007-02-23
Applicant: BANG & OLUFSEN ICEPOWER A/S , PETERSEN, Lars
Inventor： PETERSEN, Lars
IPC: H03F3/217
CPC classification number: H03F3/217 , H03F3/2173 , H03F2200/03 , H03F2200/504 , Y10T307/858
Abstract: An audio power conversion system (3) comprising a power supply (1) having a positive supply rail (100) and a negative supply rail (200) for supplying power to a single ended class D amplifier (2). The system further comprises a supply pump reduction circuit (6) connected to the supply rails (100, 200) and adapted to redistribute a pumping charge from said power supply by forcing a current-flow from a rail with a higher voltage to a rail with a lower voltage. According to the current invention, the redistribution circuit is arranges to always distribute charge from the rail with the higher voltage. This means that for practical circuits the pump canceling occurs continuously and is not confined to every other cycle as for the prior art.
Abstract translation: 一种音频电源转换系统（3），包括具有用于向单端D类放大器（2）供电的正电源轨（100）和负电源轨（200）的电源（1）。 所述系统还包括连接到所述供应轨道（100,200）的供应泵减小电路（6），并且适于通过强制来自具有较高电压的轨道的电流流向轨道而从所述电源重新分配泵送电荷， 电压较低。 根据本发明，再分配电路布置成总是从具有较高电压的轨道分配电荷。 这意味着对于实际电路，泵取消连续发生，并不限于与现有技术相同的每隔一个周期。
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