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1. 发明申请

WO2012170582A3 SWITCHED-CAPACITOR DC BLOCKING AMPLIFIER 审中-公开
公开(公告)号：WO2012170582A3
公开(公告)日：2012-12-13
申请号：PCT/US2012/041170
申请日：2012-06-06
申请人： QUALCOMM Incorporated , SHAH, Peter J. , TALEIE, Shahin Mehdizad , GROENEWOLD, Gerrit , MIAO, Guoqing , SUNG, Eunyung
发明人： SHAH, Peter J. , TALEIE, Shahin Mehdizad , GROENEWOLD, Gerrit , MIAO, Guoqing , SUNG, Eunyung
IPC分类号： H03F3/00 , H03F3/45
摘要： A switched-capacitor DC blocking amplifier is disclosed. In an embodiment, an integrated circuit is provided that includes an amplifier having an amplifier input and an amplifier output, a capacitor connected to the amplifier input and configured to receive an input signal, and a switched capacitor circuit coupled to provide a resistance between the amplifier input and the amplifier output. In one implementation, the switched capacitor circuit is configured with a feed forward circuit to reduce aliasing. In another implementation, the switched capacitor circuit includes a switched impedance circuit to reduce noise.

2. 发明申请

WO2012170582A2 SWITCHED-CAPACITOR DC BLOCKING AMPLIFIER 审中-公开
标题翻译：开关电容直流阻塞放大器
公开(公告)号：WO2012170582A2
公开(公告)日：2012-12-13
申请号：PCT/US2012041170
申请日：2012-06-06
申请人： QUALCOMM INC , SHAH PETER J , TALEIE SHAHIN MEHDIZAD , GROENEWOLD GERRIT , MIAO GUOQING , SUNG EUNYUNG
发明人： SHAH PETER J , TALEIE SHAHIN MEHDIZAD , GROENEWOLD GERRIT , MIAO GUOQING , SUNG EUNYUNG
IPC分类号： H03F3/00 , H03F3/45
CPC分类号： H03F3/45475 , H03F3/005 , H03F2200/03 , H03F2200/552 , H03F2203/45512 , H03F2203/45514 , H03F2203/45528 , H03F2203/45594 , H03F2203/45631
摘要： A switched-capacitor DC blocking amplifier is disclosed. In an embodiment, an integrated circuit is provided that includes an amplifier having an amplifier input and an amplifier output, a capacitor connected to the amplifier input and configured to receive an input signal, and a switched capacitor circuit coupled to provide a resistance between the amplifier input and the amplifier output. In one implementation, the switched capacitor circuit is configured with a feed forward circuit to reduce aliasing. In another implementation, the switched capacitor circuit includes a switched impedance circuit to reduce noise.
摘要翻译：公开了一种开关电容器直流阻塞放大器。在一个实施例中，提供一种集成电路，其包括具有放大器输入和放大器输出的放大器，连接到放大器输入并被配置为接收输入信号的电容器，以及耦合以提供放大器之间的电阻的开关电容器电路输入和放大器输出。在一个实现中，开关电容器电路配置有前馈电路以减少混叠。在另一实施方案中，开关电容器电路包括用于降低噪声的开关阻抗电路。

3. 发明申请

WO2009045928A1 SUPPRESSING OUTPUT OFFSET IN AN AUDIO DEVICE 审中-公开
标题翻译：在音频设备中抑制输出偏移
公开(公告)号：WO2009045928A1
公开(公告)日：2009-04-09
申请号：PCT/US2008/078000
申请日：2008-09-26
申请人： QUALCOMM Incorporated , CHILAKAPATI, Uma , BAZARJANI, Seyfollah , FITZGERALD, Joseph , MIAO, Guoqing , NELSON, Hui-Ya , SIDIQI, Khalid J. , HINRICHS, Jeffrey
发明人： CHILAKAPATI, Uma , BAZARJANI, Seyfollah , FITZGERALD, Joseph , MIAO, Guoqing , NELSON, Hui-Ya , SIDIQI, Khalid J. , HINRICHS, Jeffrey
IPC分类号： H03M1/10 , H03M3/04 , H03M1/66
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。

4. 发明申请

WO2012125767A1 CHARGE PUMP ELECTROSTATIC DISCHARGE PROTECTION 审中-公开
标题翻译：充电泵静电放电保护
公开(公告)号：WO2012125767A1
公开(公告)日：2012-09-20
申请号：PCT/US2012/029129
申请日：2012-03-14
申请人： QUALCOMM INCORPORATED , SRIVASTAVA, Ankit , WORLEY, Eugene, R. , MIAO, Guoqing , QUAN, Xiaohong
发明人： SRIVASTAVA, Ankit , WORLEY, Eugene, R. , MIAO, Guoqing , QUAN, Xiaohong
IPC分类号： H03F1/52 , H01L27/02 , H02M3/07
CPC分类号： H03F1/52 , H01L27/0285 , H02M1/32 , H02M3/07
摘要： Techniques for electrostatic discharge (ESD) protection for amplifiers and other circuitry employing charge pumps. In an exemplary embodiment, a Vneg switch coupling a second flying capacitor node to a negative output voltage node is closed in response to an ESD event being detected between a supply voltage node and the negative output voltage node. A ground switch coupling a ground node to the second flying capacitor node is closed in response to an ESD event being detected between the ground node and the negative output voltage node. The Vneg switch is further closed in response to the ESD event being detected between the ground node and the negative output voltage node. Further techniques are disclosed for providing on-chip snapback clamps at the output of a power amplifier coupled to the charge pump to protect against ESD events as defined by the standard IEC 61000-4-2.
摘要翻译：用于放大器和使用电荷泵的其他电路的静电放电（ESD）保护技术。在示例性实施例中，响应于在电源电压节点和负输出电压节点之间检测到ESD事件，将第二飞跨电容器节点耦合到负输出电压节点的Vneg开关闭合。响应于在接地节点和负输出电压节点之间检测到ESD事件，将接地节点耦合到第二飞跨电容器节点的接地开关闭合。响应于在接地节点和负输出电压节点之间检测到ESD事件，Vneg开关进一步闭合。公开了用于在耦合到电荷泵的功率放大器的输出处提供片上快速恢复钳位以防止由标准IEC 61000-4-2定义的ESD事件的其它技术。

5. 发明申请

WO2008137992A1 METHOD AND APPARATUS FOR POWERING DOWN ANALOG INTEGRATED CIRCUITS 审中-公开
标题翻译：用于断电模拟集成电路的方法和装置
公开(公告)号：WO2008137992A1
公开(公告)日：2008-11-13
申请号：PCT/US2008/063071
申请日：2008-05-08
申请人： QUALCOMM Incorporated , MIAO, Guoqing
发明人： MIAO, Guoqing
IPC分类号： H03K19/00
CPC分类号： H03K19/0013
摘要： A method and an apparatus powers down an analog integrated circuit. A power down circuit is electrically coupled to the analog circuit and is adapted to power down the analog circuit in response to receiving a power down signal. A node protection circuit is electrically coupled to the analog circuit and is adapted to provide a predetermined voltage potential to at least one predetermined node in the analog circuit in response to receiving the power down signal when a voltage potential at the at least one predetermined node is not determined by the power down circuit.
摘要翻译：一种方法和装置使模拟集成电路断电。断电电路电耦合到模拟电路，并且适于响应于接收掉电信号而使模拟电路断电。节点保护电路电耦合到模拟电路，并且适于在模拟电路中响应于当至少一个预定节点处的电压电位为接收功率下降信号时向模拟电路中的至少一个预定节点提供预定电压电势不由断电电路决定。

6. 发明申请

WO2012125766A3 CHARGE PUMP SURGE CURRENT REDUCTION 审中-公开
公开(公告)号：WO2012125766A3
公开(公告)日：2012-09-20
申请号：PCT/US2012/029128
申请日：2012-03-14
申请人： QUALCOMM INCORPORATED , QUAN, Xiaohong , SRIVASTAVA, Ankit , MIAO, Guoqing
发明人： QUAN, Xiaohong , SRIVASTAVA, Ankit , MIAO, Guoqing
IPC分类号： H02M3/07
摘要： Techniques for reducing surge current in charge pumps. In an exemplary embodiment, one or more switches coupling a terminal of a flying capacitor to a voltage supply are configured to have variable on-resistance. When the charge pump is configured to switch a gain mode from a lower gain to a higher gain, the one or more variable resistance switches are configured to have a decreasing resistance profile over time. In this manner, surge current drawn from the voltage supply at the outset of the gain switch may be limited, while the on-resistance during steady-state charging and discharging may be kept low. Similar techniques are provided to decrease the surge current from a bypass switch coupling the supply voltage to a positive output voltage of the charge pump.

7. 发明申请

WO2009111500A2 SYSTEM AND METHOD OF REDUCING POWER CONSUMPTION FOR AUDIO PLAYBACK 审中-公开
标题翻译：降低音频播放功率消耗的系统和方法
公开(公告)号：WO2009111500A2
公开(公告)日：2009-09-11
申请号：PCT/US2009035917
申请日：2009-03-03
申请人： QUALCOMM INC , BAZARJANI SEYFOLLAH , MIAO GUOQING , FITZGERALD JOSEPH R , KULKARNI PRAJAKT V , GAGNE JUSTIN JOSEPH ROSEN , MCALLISTER GENE H , HINRICHS JEFFREY , VAN DER WAGT JAN PAUL
发明人： BAZARJANI SEYFOLLAH , MIAO GUOQING , FITZGERALD JOSEPH R , KULKARNI PRAJAKT V , GAGNE JUSTIN JOSEPH ROSEN , MCALLISTER GENE H , HINRICHS JEFFREY , VAN DER WAGT JAN PAUL
IPC分类号： H03M1/06
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：提高音频系统功耗效率的系统和方法。本质上，该技术是响应于由音量控制模块指示的音量水平和/或响应于所检测到的输入特性而调整从电源传送到诸如功率放大器的模拟部分的功率音频信号。因此，以这种方式，模拟部分以与其正在处理的信号的电平有关的方式进行操作。此外，该系统和方法还涉及调整数字信号和模拟信号的动态范围以提高系统的整体动态范围而不需要消耗额外功率的技术。

8. 发明申请

WO2020062099A1 BODY BIASING TO BALANCE RDAC SWITCHES 审中-公开
公开(公告)号：WO2020062099A1
公开(公告)日：2020-04-02
申请号：PCT/CN2018/108485
申请日：2018-09-28
申请人： QUALCOMM INCORPORATED , MIAO, Guoqing , SU, Wenjun , YIN, Guangming , JIANG, Bo
发明人： MIAO, Guoqing , SU, Wenjun , YIN, Guangming , JIANG, Bo
IPC分类号： H03M1/66
摘要： The present disclosure describes aspects of body biasing to balance resistive digital-to-analog converter (RDAC) switches. In some aspects, a unit of an RDAC circuit includes a first switch having a source coupled to a voltage source and a drain coupled to a resistor of the RDAC unit. The RDAC unit also includes a second switch having a source coupled to a lower potential and a drain coupled to the resistor of the RDAC unit. A body biasing circuit provides a bias voltage that is applied to a body terminal of the first switch or the second switch of the RDAC unit. By applying the bias voltage to the body terminal of one or both of the RDAC unit switches, respective on-resistances of the switches can be balanced or matched. This may in turn improve RDAC circuit performance, such as by reducing total harmonic distortion associated with switch on-resistance mismatch.

9. 发明申请

WO2012125766A2 CHARGE PUMP SURGE CURRENT REDUCTION 审中-公开
标题翻译：充电泵浪涌电流减少
公开(公告)号：WO2012125766A2
公开(公告)日：2012-09-20
申请号：PCT/US2012029128
申请日：2012-03-14
申请人： QUALCOMM INC , QUAN XIAOHONG , SRIVASTAVA ANKIT , MIAO GUOQING
发明人： QUAN XIAOHONG , SRIVASTAVA ANKIT , MIAO GUOQING
CPC分类号： H02M3/07 , H02M1/36 , H02M2001/0045 , H02M2003/071 , H02M2003/072
摘要： Techniques for reducing surge current in charge pumps. In an exemplary embodiment, one or more switches coupling a terminal of a flying capacitor to a voltage supply are configured to have variable on-resistance. When the charge pump is configured to switch a gain mode from a lower gain to a higher gain, the one or more variable resistance switches are configured to have a decreasing resistance profile over time. In this manner, surge current drawn from the voltage supply at the outset of the gain switch may be limited, while the on-resistance during steady-state charging and discharging may be kept low. Similar techniques are provided to decrease the surge current from a bypass switch coupling the supply voltage to a positive output voltage of the charge pump.
摘要翻译：降低电荷泵浪涌电流的技术。在示例性实施例中，将飞跨电容器的端子耦合到电压源的一个或多个开关被配置为具有可变的导通电阻。当电荷泵被配置为将增益模式从较低增益切换到较高增益时，一个或多个可变电阻开关被配置为具有随时间减小的电阻分布。以这种方式，可以限制在增益开关开始时从电压源引出的浪涌电流，而稳态充放电期间的导通电阻可以保持较低。提供了类似的技术以减少将电源电压耦合到电荷泵的正输出电压的旁路开关的浪涌电流。

10. 发明申请

WO2009099904A3 SYSTEM AND METHOD OF REDUCING CLICK AND POP NOISE IN AUDIO PLAYBACK DEVICES 审中-公开
标题翻译：降低音频播放设备中的点击和POP噪声的系统和方法
公开(公告)号：WO2009099904A3
公开(公告)日：2009-10-15
申请号：PCT/US2009032504
申请日：2009-01-29
申请人： QUALCOMM INC , MIAO GUOQING
发明人： MIAO GUOQING
IPC分类号： H03F1/30
CPC分类号： H03F1/305 , H03F3/187 , H03F3/45475 , H03F2200/03 , H03F2203/45136
摘要： An audio system that reduces or eliminates click and pop noise during power up and power down operations. In particular, the audio system includes an amplifier with an input adapted to receive an input audio signal and an output adapted to produce an amplified output audio signal for an associated speaker. The audio system further includes a noise reduction circuit adapted to smoothly apply and remove a DC voltage to and from the output of the amplifier in a manner that reduces or eliminates click and pop noise from being generated by the associated speaker. The DC voltage at the output of the amplifier may be derived from a DC reference voltage source and/or from the input audio signal.
摘要翻译：在开机和关机操作期间降低或消除咔嗒声和pop噗声的音频系统。特别地，音频系统包括具有适于接收输入音频信号的输入和适于为相关联的扬声器产生放大的输出音频信号的输出的放大器。音频系统进一步包括降噪电路，其适于以减少或消除由相关扬声器产生的咔嗒声和砰声噪声的方式平滑地向放大器的输出施加直流电压或从放大器的输出移除直流电压。放大器输出处的DC电压可以来自DC参考电压源和/或来自输入音频信号。

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