公开(公告)号：EP2536014A1

公开(公告)日：2012-12-19

申请号：EP11170024.1

申请日：2011-06-15

Applicant: Bang & Olufsen IcePower A/S

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：EP2092639B1

公开(公告)日：2011-09-21

申请号：EP07859471.0

申请日：2007-12-20

Applicant: Bang & Olufsen IcePower A/S

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.

公开(公告)号：EP1456951B1

公开(公告)日：2010-01-20

申请号：EP02779847.9

申请日：2002-12-05

Applicant: Bang & Olufsen IcePower A/S

Inventor： NIELSEN, Ole, Neis

IPC: H03K5/1252

CPC classification number: H03K17/6871 ,  H03K17/063

公开(公告)号：EP1606885B1

公开(公告)日：2009-02-11

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.

公开(公告)号：EP1994638A1

公开(公告)日：2008-11-26

申请号：EP07713091.2

申请日：2007-03-02

Applicant: Bang & Olufsen IcePower A/S

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 1st 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.

公开(公告)号：EP1989915A1

公开(公告)日：2008-11-12

申请号：EP07733893.7

申请日：2007-02-16

Applicant: Bang & Olufsen IcePower A/S

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后的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符合设计用于最坏情况，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 ）。 当传感器放置在小型后壳体中时，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。 软悬挂长距离（SSL）微型换能器设计有改进的非圆形磁性系统，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微传感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：EP3231086B1

公开(公告)日：2020-06-03

申请号：EP15801434.0

申请日：2015-11-27

Applicant: ICEPOWER A/S

Inventor： SKOV ANDERSEN, Kennet

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

公开(公告)号：EP2536014B1

公开(公告)日：2016-12-28

申请号：EP11170024.1

申请日：2011-06-15

Applicant: ICEPOWER A/S

Inventor： Frium, Mads Peter

IPC: H02M3/335

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

公开(公告)号：EP1987585B1

公开(公告)日：2011-08-17

申请号：EP07705648.9

申请日：2007-02-23

Applicant: Bang & Olufsen IcePower A/S

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.

公开(公告)号：EP2127071B1

公开(公告)日：2011-06-15

申请号：EP07859499.1

申请日：2007-12-21

Applicant: Bang & Olufsen IcePower A/S

Inventor： NIELSEN, Ole Neis

IPC: H03F3/217 ,  H03F1/32

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.