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1. 发明授权

US09425747B2 System and method of reducing power consumption for audio playback 有权
标题翻译：降低音频播放功耗的系统和方法
公开(公告)号：US09425747B2
公开(公告)日：2016-08-23
申请号：US12041414
申请日：2008-03-03
申请人： Seyfollah Bazarjani , Guoqing Miao , Joseph R. Fitzgerald , Prajakt V. Kulkarni , Justin Joseph Rosen Gagne , Gene H. McAllister , Jeffrey Hinrichs , Jan Paul van der Wagt
发明人： Seyfollah Bazarjani , Guoqing Miao , Joseph R. Fitzgerald , Prajakt V. Kulkarni , Justin Joseph Rosen Gagne , Gene H. McAllister , Jeffrey Hinrichs , Jan Paul van der Wagt
IPC分类号： H03F99/00 , H03G3/00 , H03F1/02 , H03G3/30 , H03G3/32
CPC分类号： H03F1/0222 , H03F1/0211 , H03F2200/03 , H03G3/30 , H03G3/3005 , H03G3/32
摘要： A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.
摘要翻译：一种提高音频系统功耗效率的系统和方法。实质上，该技术是根据由音量控制模块指示的音量水平和/或响应于检测到的输入特性来调节从电源传递到模拟部分（例如功率放大器）的功率音频信号。因此，以这种方式，模拟部分以与其正在处理的信号的电平相关的方式操作。此外，该系统和方法还涉及一种调整数字信号和模拟信号的动态范围的技术，以改善系统的整体动态范围，而不需要消耗附加功率。

2. 发明授权

US08503695B2 Suppressing output offset in an audio device 有权
标题翻译：抑制音频设备中的输出偏移
公开(公告)号：US08503695B2
公开(公告)日：2013-08-06
申请号：US12237786
申请日：2008-09-25
申请人： Uma Chilakapati , Seyfollah Bazarjani , Joseph Fitzgerald , Guoqing Miao , Hui-Ya Nelson , Khalid Sidiqi , Jeffrey Hinrichs
发明人： Uma Chilakapati , Seyfollah Bazarjani , Joseph Fitzgerald , Guoqing Miao , Hui-Ya Nelson , Khalid Sidiqi , Jeffrey Hinrichs
IPC分类号： H04B15/00
CPC分类号： H03M3/384 , H03M1/1019 , H03M1/66 , H03M3/50
摘要： A digital offset is combined with an audio signal in the digital domain to cancel an output offset caused by one or more analog components processing the same audio signal. In this manner, the offset at the output of the audio signal path (e.g., at a power amplifier output) is reduced or eliminated. Consequently, audible artifacts, such as click-and-pop artifacts, can be reduced or eliminated. In audio devices operating in ground-referenced capless mode, power consumption is reduced because of reduced or eliminated direct current (DC) leakage current through speakers or headsets of such audio devices. In some circumstances, the digital offset in the digital domain may be applied at substantially all times of operation of the audio signal path.
摘要翻译：数字偏移与数字域中的音频信号组合以消除由处理相同音频信号的一个或多个模拟分量引起的输出偏移。以这种方式，减少或消除音频信号路径输出处的偏移（例如，在功率放大器输出端）。因此，可以减少或消除诸如点击和流行伪像的声音伪影。在以地面参考无盖模式工作的音频设备中，由于减少或消除了通过这种音频设备的扬声器或耳机的直流（DC）泄漏电流，功耗将会降低。在某些情况下，数字域中的数字偏移可以在音频信号路径的操作的基本上全部被应用。

3. 发明申请

US20070035425A1 HIGH SPEED DIGITAL DELTA-SIGMA MODULATOR WITH INTEGRATED UPSAMPLER 有权
标题翻译：高速数字三角形调制器与集成UPSAMPLER
公开(公告)号：US20070035425A1
公开(公告)日：2007-02-15
申请号：US11202307
申请日：2005-08-10
申请人： Jeffrey Hinrichs , Harry Harberts
发明人： Jeffrey Hinrichs , Harry Harberts
IPC分类号： H03M3/00
CPC分类号： H03H17/0657 , H03M3/508 , H03M7/3017 , H03M7/3035 , H03M7/304
摘要： Apparatus, and a related method, for converting digital signals directly to radio-frequency (RF) analog signals. The apparatus includes a single high-speed delta-sigma modulator and an integrated upsampler that increases the data rate of digital input samples by a selected factor, such as nine times. The delta-sigma modulator is configured to include a feedback multiplier coefficients that are selected to greatly facilitate operation of associated adders. At least one critical adder includes a carry-select adder modification that further speeds up the add operation and ensures that the apparatus operates at desirably high frequencies.
摘要翻译：用于将数字信号直接转换成射频（RF）模拟信号的装置和相关方法。该装置包括单个高速Δ-Σ调制器和集成上采样器，其通过选择的因子（例如九次）来增加数字输入样本的数据速率。 Δ-Σ调制器被配置为包括被选择以极大地促进相关加法器的操作的反馈乘法器系数。至少一个关键加法器包括进位选择加法器修改，进一步加速加法运算，并确保装置以期望的高频工作。

4. 发明申请

US20090220110A1 SYSTEM AND METHOD OF REDUCING POWER CONSUMPTION FOR AUDIO PLAYBACK 有权
标题翻译：降低音频播放功耗的系统和方法
公开(公告)号：US20090220110A1
公开(公告)日：2009-09-03
申请号：US12041414
申请日：2008-03-03
申请人： Seyfollah Bazarjani , Guoqing Miao , Joseph R. Fitzgerald , Prajakt V. Kulkarni , Justin Joseph Rosen Gagne , Gene H. McAllister , Jeffrey Hinrichs , Jan Paul van der Wagt
发明人： Seyfollah Bazarjani , Guoqing Miao , Joseph R. Fitzgerald , Prajakt V. Kulkarni , Justin Joseph Rosen Gagne , Gene H. McAllister , Jeffrey Hinrichs , Jan Paul van der Wagt
IPC分类号： H03F21/00
CPC分类号： H03F1/0222 , H03F1/0211 , H03F2200/03 , H03G3/30 , H03G3/3005 , H03G3/32
摘要： A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.
摘要翻译：一种提高音频系统功耗效率的系统和方法。实质上，该技术是根据由音量控制模块指示的音量水平和/或响应于检测到的输入特性来调节从电源传递到模拟部分（例如功率放大器）的功率音频信号。因此，以这种方式，模拟部分以与其正在处理的信号的电平相关的方式操作。此外，该系统和方法还涉及一种调整数字信号和模拟信号的动态范围的技术，以改善系统的整体动态范围，而不需要消耗附加功率。

5. 发明申请

US20070046366A1 Tunable resonator for use in active-RC continuous-time filters 有权
标题翻译：可调谐谐振器用于主动RC连续时间滤波器
公开(公告)号：US20070046366A1
公开(公告)日：2007-03-01
申请号：US11203579
申请日：2005-08-10
申请人： Jeffrey Hinrichs , William Goyette
发明人： Jeffrey Hinrichs , William Goyette
IPC分类号： H03K5/00
CPC分类号： H03H11/1291 , H03H11/1252
摘要： An integrated circuit (IC) resonator in which resonator parameters potentially affected by IC fabrication processes are correctable after fabrication. Resonance frequency tuning is effected by forming each feedback capacitor in a pair of integrator circuits to include a variable capacitance device, such as a varactor diode. A tuning signal is applied to the varactor diode to adjust the total capacitance value and, therefore, the resonance frequency. Similarly, the quality (Q) factor of the resonator is adjusted by providing a variable capacitance in an RC (resistance-capacitance) network coupling the output of one of the integrator circuits to the input of the other. The variable capacitance in the RC network permits adjustment of phase in the event that the integrator circuits do not provide a desired 180° total phase shift.
摘要翻译：一种集成电路（IC）谐振器，其中可能受IC制造工艺影响的谐振器参数在制造之后是可校正的。谐振频率调谐通过在一对积分器电路中形成每个反馈电容器来实现，以包括可变电容器件，例如变容二极管。调谐信号被施加到变容二极管以调整总电容值，因此调谐谐振频率。类似地，通过在将一个积分器电路的输出耦合到另一个的输入的RC（电阻 - 电容）网络中提供可变电容来调节谐振器的质量（Q）因子。在积分器电路不提供所需的180°总相移的情况下，RC网络中的可变电容允许调整相位。

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