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1. 发明公开

EP2323254A1 A plop-free amplifier 有权
标题翻译： KnacksfreierVerstärker
公开(公告)号：EP2323254A1
公开(公告)日：2011-05-18
申请号：EP09176061.1
申请日：2009-11-16
申请人： NXP B.V.
发明人： Schuurmans, Han
IPC分类号： H03F1/30 , H03F3/21
CPC分类号： H03F1/305 , H03F3/187 , H03F3/211 , H03F3/2171
摘要： An amplifier is disclosed, wherein the output stage is split between a primary output stage and a secondary stage. To minimise or eliminate any audible plop when the amplifier is switched on, the primary stage is connected, and the second stage is gradually connected using a switch. The gradual connection can be by means of varying the pulse-density of a pulse wave modulation on the switch, from fully open (0% pulse-density) to fully closed (100%). The inverse process can minimise or eliminate plop during switch-off. Separate feedback loops are switchable, from the primary and secondary stages; in a DC-coupled embodiment, the feedback loop from the secondary stage may include DC-offset cancelling circuitry, to both reduce or eliminate the plop and avoid and DC-offset current through the speaker.
摘要翻译：公开了一种放大器，其中输出级在主输出级和次级级之间分配。为了最大限度地减少或消除放大器接通时的任何声音，主级连接，第二级使用开关逐渐连接。可以通过改变开关上脉冲波调制的脉冲密度，从完全打开（0％脉冲密度）到完全闭合（100％）来逐渐连接。反向过程可以在关断期间最小化或消除平移。独立的反馈回路可以从主级和次级切换; 在DC耦合实施例中，来自次级的反馈回路可以包括DC偏移消除电路，以减少或消除电平，并避免通过扬声器的DC偏移电流。

2. 发明授权

EP2802074B1 Amplifier circuit and amplification method 有权转让
标题翻译：放大器电路和放大方法
公开(公告)号：EP2802074B1
公开(公告)日：2015-08-05
申请号：EP13167118.2
申请日：2013-05-08
申请人： NXP B.V.
发明人： Van Dommelen, Maarten , Schuurmans, Han
IPC分类号： H03F1/30 , H03F3/45
CPC分类号： H03G3/301 , G07C9/00309 , G07C9/00571 , G07C2009/00634 , G07C2009/00777 , G07C2009/00793 , H03F1/305 , H03F3/187 , H03F3/2171 , H03F3/45 , H03F3/45071 , H03F3/45973 , H03F2200/03 , H03F2203/45528 , H03F2203/45588

3. 发明公开

EP2645739A1 Control of a microphone 有权转让
标题翻译： Steuerung eines Mikrofons
公开(公告)号：EP2645739A1
公开(公告)日：2013-10-02
申请号：EP12162414.2
申请日：2012-03-30
申请人： NXP B.V.
发明人： Schuurmans, Han , Van Dommelen, Maarten
IPC分类号： H04R3/00 , H03M1/18 , H03M3/02 , H04R3/02
CPC分类号： H04R3/00 , H03M1/183 , H03M3/486 , H03M3/49 , H04R3/02 , H04R2410/00
摘要： A microphone circuit has a clip detection circuit which detects when an analogue to digital converter output has reached a threshold. A variable attenuator is controlled based on the clip detection circuit output. The feedback is thus based on the ADC output level, and the processing of this signal can be implemented without requiring baseband processing of the signal - it can simply be based on a state of the ADC output. An overrule function is also provided so that the clip detection AGC control can be inhibited or controlled differently.
摘要翻译：麦克风电路具有检测模拟数字转换器输出何时达到阈值的片段检测电路。基于片段检测电路输出控制可变衰减器。因此，反馈基于ADC输出电平，并且可以实现该信号的处理，而不需要信号的基带处理 - 它可以简单地基于ADC输出的状态。还提供了一个叠加功能，使得可以不同地抑制或控制剪辑检测AGC控制。

4. 发明授权

EP2323254B1 A plop-free amplifier 有权
标题翻译：无裂纹放大器
公开(公告)号：EP2323254B1
公开(公告)日：2012-06-06
申请号：EP09176061.1
申请日：2009-11-16
申请人： NXP B.V.
发明人： Schuurmans, Han
IPC分类号： H03F1/30 , H03F3/21
CPC分类号： H03F1/305 , H03F3/187 , H03F3/211 , H03F3/2171

5. 发明公开

EP2367366A1 Control of a microphone 有权转让
标题翻译： Steuerung eines Mikrofons
公开(公告)号：EP2367366A1
公开(公告)日：2011-09-21
申请号：EP10156808.7
申请日：2010-03-17
申请人： NXP B.V.
发明人： Schuurmans, Han
IPC分类号： H04R3/00 , H03M3/02
CPC分类号： H03M1/183 , H03M3/48 , H04R3/02 , H04R2410/00
摘要： A microphone circuit has a clip detection circuit (30) which detects when an analogue to digital converter (ADC,12) output has reached a threshold. A variable attenuator (34a,34b,34c,34d), preferably in the form of a variable input load associated with the microphone (11), is controlled based on the clip detection circuit output. The feedback is thus based on the ADC output level, and the processing of this signal can be implemented without requiring baseband processing of the signal - it can simply be based on a state of the ADC output.
摘要翻译：麦克风电路具有检测模数转换器（ADC，12）输出何时达到阈值的片段检测电路（30）。基于剪辑检测电路输出来控制可变衰减器（34a，34b，34c，34d），其优选地与麦克风（11）相关联的可变输入负载的形式。因此，反馈基于ADC输出电平，并且可以实现该信号的处理，而不需要信号的基带处理 - 它可以简单地基于ADC输出的状态。

6. 发明授权

EP2645739B1 Control of a microphone 有权转让
标题翻译：控制麦克风
公开(公告)号：EP2645739B1
公开(公告)日：2018-03-14
申请号：EP12162414.2
申请日：2012-03-30
申请人： NXP B.V.
发明人： Schuurmans, Han , Van Dommelen, Maarten
IPC分类号： H04R3/00 , H03M1/18 , H03M3/02 , H04R3/02 , H03M3/00
CPC分类号： H04R3/00 , H03M1/183 , H03M3/486 , H03M3/49 , H04R3/02 , H04R2410/00
摘要： A microphone circuit has a clip detection circuit which detects when an analogue to digital converter output has reached a threshold. A variable attenuator is controlled based on the clip detection circuit output. The feedback is thus based on the ADC output level, and the processing of this signal can be implemented without requiring baseband processing of the signal - it can simply be based on a state of the ADC output. An overrule function is also provided so that the clip detection AGC control can be inhibited or controlled differently.

7. 发明公开

EP2802074A1 Amplifier circuit and amplification method 有权转让
标题翻译： VerstärkerschaltungundVerstärkungsverfahren
公开(公告)号：EP2802074A1
公开(公告)日：2014-11-12
申请号：EP13167118.2
申请日：2013-05-08
申请人： NXP B.V.
发明人： Van Dommelen, Maarten , Schuurmans, Han
IPC分类号： H03F1/30 , H03F3/45
CPC分类号： H03G3/301 , G07C9/00309 , G07C9/00571 , G07C2009/00634 , G07C2009/00777 , G07C2009/00793 , H03F1/305 , H03F3/187 , H03F3/2171 , H03F3/45 , H03F3/45071 , H03F3/45973 , H03F2200/03 , H03F2203/45528 , H03F2203/45588
摘要： A true ground amplifier circuit in which a voltage sensor senses the output voltage and generates a binary output which indicates whether the output is above or below a threshold. A variable gain feedback system generates a feedback signal for combination with the digital input, thereby to provide offset cancellation. The variable gain is reduced over time to provide offset cancellation during an initial period of time of operation of the amplifier circuit. This provides offset cancellation during a start-up period, for example.
摘要翻译：一种真正的地面放大器电路，其中电压传感器感测输出电压并产生指示输出是否高于或低于阈值的二进制输出。可变增益反馈系统产生用于与数字输入组合的反馈信号，从而提供偏移消除。随着时间的推移，可变增益被减小以在放大器电路的初始操作时间期间提供偏移消除。例如，这在启动期间提供偏移消除。

8. 发明授权

EP2367366B1 Control of a microphone 有权转让
标题翻译：控制麦克风
公开(公告)号：EP2367366B1
公开(公告)日：2012-11-14
申请号：EP10156808.7
申请日：2010-03-17
申请人： NXP B.V.
发明人： Schuurmans, Han
IPC分类号： H04R3/00 , H03M3/02 , H03M1/18
CPC分类号： H03M1/183 , H03M3/48 , H04R3/02 , H04R2410/00

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