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1. 发明申请

WO2008075318A2 ERROR CORRECTION SYSTEM FOR A CLASS-D POWER STAGE 审中-公开
标题翻译：一类D级电源故障校正系统
公开(公告)号：WO2008075318A2
公开(公告)日：2008-06-26
申请号：PCT/IB2007/055279
申请日：2007-12-21
申请人： BANG & OLUFSEN ICEPOWER A/S , NIELSEN, Ole Neis
发明人： NIELSEN, Ole Neis
CPC分类号： H03F3/217 , H03F1/32 , H03F2200/03 , H03F2200/144 , H03F2200/351 , H03F2200/372 , H03M1/1033 , H03M1/822
摘要： 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.
摘要翻译：本发明涉及用于校正在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产生反馈信号; - 通过将反馈信号与参考信号进行比较来导出误差信号; - 通过低通滤波器对误差信号进行滤波，以降低载波的高次谐波; - 添加一个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，从而通过将滤波后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。

2. 发明申请

WO2008072182A2 DIGITAL PULSE MODULATORS HAVING FREE-RUNNING CLOCK 审中-公开
标题翻译：具有自由运行时钟的数字脉冲调制器
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
申请人： BANG & OLUFSEN ICEPOWER A/S , KRAGH, Morten , NIELSEN, Ole Neis
发明人： KRAGH, Morten , NIELSEN, Ole Neis
IPC分类号： H03K7/08
CPC分类号： H03K7/08 , H03F3/217
摘要： 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).
摘要翻译：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。

3. 发明申请

WO2008075306A1 TRUE CURRENT LIMITING (TCL) 审中-公开
标题翻译：真正限流（TCL）
公开(公告)号：WO2008075306A1
公开(公告)日：2008-06-26
申请号：PCT/IB2007/055247
申请日：2007-12-20
申请人： BANG & OLUFSEN ICEPOWER A/S , NIELSEN, Ole Neis
发明人： NIELSEN, Ole Neis
IPC分类号： H03F3/217 , H03F1/52
CPC分类号： H03F3/217 , H03F1/52
摘要： 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.
摘要翻译：本发明涉及限流方法，例如， G。用于D类放大器，其包括独特的检测和控制方法。电流检测电路可以实现为电压测量，其中测量的电压对应于流过功率开关器件的电流。达到设定限制后，该设备可以关闭。通过强制某些OFF时间，相关的控制系统表现为自振电流限制电路。这可以在本地靠近开关装置实现并且独立于其它本地或全局控制系统。

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