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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
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.
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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
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.
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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
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.
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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.
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公开(公告)号：US20170338777A1
公开(公告)日：2017-11-23
申请号：US15528927
申请日：2015-09-24
Applicant: ICEpower a/s
Inventor： Kennet Skov Anderson , Eskil Jørgensen
CPC classification number: H03F1/305 , H03F1/34 , H03F3/183 , H03F3/217 , H03F2200/03
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.
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Patent Agency Ranking
公开(公告)号：US20140070885A1
公开(公告)日：2014-03-13
申请号：US14115372
申请日：2012-05-21
Applicant: BANG & OLUFSEN ICEPOWER A/S
Inventor： Mads Peter Frium
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, including a first primary winding connected in series with a first switch between the positive supply rail and ground, a second primary winding in phase with said first primary winding and connected in series with a second switch between the negative supply rail and ground, and a controller adapted to apply a control signal to said first and second switches, said control signal (Q) having ON-pulses of a predefined pulse time separated by a dead time. 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类放大器的电源装置，包括与正电源轨和地之间的第一开关串联连接的第一初级绕组，与所述第一初级绕组同相连接的第二初级绕组， 在负电源轨和地之间切换，以及控制器，适于向所述第一和第二开关施加控制信号，所述控制信号（Q）具有以死区时间分隔的预定脉冲时间的导通脉冲。 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：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
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.
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公开(公告)号：US20180367107A1
公开(公告)日：2018-12-20
申请号：US15991321
申请日：2018-05-29
Applicant: ICEpower A/S
Inventor： Patrik BOSTRÖM , Martin PERSSON
CPC classification number: H03F3/2171 , H03F3/183 , H03F2200/03
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.
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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
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.
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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
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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