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1.发明授权Signal level selected efficiency in a charge pump power supply for a consumer device audio power output stage 有权信号电平选择用于消费者设备音频功率输出级的电荷泵电源中的效率公开(公告)号：US07830209B1
公开(公告)日：2010-11-09
申请号：US12355839
申请日：2009-01-19
IPC分类号： H03F3/04
CPC分类号： H03F3/187 , H03F1/0211 , H03G3/004 , H03G3/04
摘要： A charge pump power supply for a consumer device audio power stage has an efficiency selected according to signal level. The frequency of operation of the charge pump and/or the effective size of a switching transistor bank is adjusted based upon a volume (gain) setting, or a detected signal level, so that internal power consumption of the charge pump is reduced when high output current is not required from the audio power stage and consequently from the charge pump. Operating modes of the charge pump are selected by the signal level indication and include at least a high power and a high efficiency mode selected by setting the charge pump operating frequency and/or enabling or disabling switching of one or more of multiple parallel transistors used to implement each switching element of the charge pump, thereby setting the level of gate capacitance being charged/discharged by the gate driver circuit(s).
摘要翻译： 用于消费者设备音频功率级的电荷泵电源具有根据信号电平选择的效率。 基于体积（增益）设置或检测到的信号电平来调节电荷泵的操作频率和/或开关晶体管组的有效尺寸，使得当高输出时电荷泵的内部功耗降低 音频功率级和电荷泵不需要电流。 通过信号电平指示来选择电荷泵的工作模式，并且至少包括通过设置电荷泵工作频率和/或启用或禁用多个并联晶体管中的一个或多个的选择的高功率和高效率模式，所述多个并联晶体管用于 实现电荷泵的每个开关元件，从而设置栅极电容的电平由栅极驱动电路充电/放电。
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公开(公告)号：US09210500B2
公开(公告)日：2015-12-08
申请号：US13588021
申请日：2012-08-17
CPC分类号： H04R3/00 , H04R5/033 , H04R5/04 , H04R29/00 , H04R2420/05
摘要： A circuit including headset type detection provides compatibility with different transducer types, such as headphones provided by different manufacturers. An audio circuit that generates or receives an audio signal includes electrical terminals for coupling to a transducer device, at least one of which carries the audio signal. A transducer device type detection circuit is included and detects a type of a transducer device coupled to the audio device from characteristics measured at the multiple electrical terminals when the transducer is coupled to the audio device. The circuit also includes a configuration control circuit for altering a configuration of the audio device according to a detected type of the transducer device.
摘要翻译： 包括耳机类型检测的电路提供与不同传感器类型的兼容性，例如由不同制造商提供的耳机。 产生或接收音频信号的音频电路包括用于耦合到换能器装置的电端子，其中至少一个承载音频信号。 包括传感器装置类型检测电路，并且当换能器耦合到音频装置时，根据在多个电端子处测量的特性来检测耦合到音频装置的换能器装置的类型。 电路还包括配置控制电路，用于根据检测到的换能器装置的类型改变音频装置的配置。
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3.发明授权Low-noise voltage reference generator with digitally-filtered reference matching 有权具有数字滤波参考匹配的低噪声电压基准发生器公开(公告)号：US08390493B1
公开(公告)日：2013-03-05
申请号：US12827468
申请日：2010-06-30
申请人： Harish Raghavan , John Christopher Tucker , Scott Allan Woodford , Daniel John Allen , Anand Ilango
发明人： Harish Raghavan , John Christopher Tucker , Scott Allan Woodford , Daniel John Allen , Anand Ilango
IPC分类号： H03M1/00
摘要： A voltage reference circuit provides a precision voltage reference output without requiring a filter capacitor. The voltage reference output is generated by a digitally-controlled source, which has a value set by the output of a digital filter that filters the output of a comparison circuit that compares the voltage reference output to another reference. A selectable mode can be provided to provide a fast response during a startup/reset period and an optional hold or narrowband response after startup. The mode selection may also offer selection of an externally-supplied digital control value and/or a resistor divider type voltage reference as an alternative to the digitally-controlled source.
摘要翻译： 电压基准电路提供精密的电压基准输出，无需滤波电容。 电压参考输出由数字控制源产生，数字控制源由数字滤波器的输出设置的值，该数字滤波器的输出对比较电路的输出进行比较，该比较电路将电压参考输出与另一个参考值进行比较。 可以提供可选模式以在启动/复位期间提供快速响应，以及启动后的可选保持或窄带响应。 模式选择还可以提供外部提供的数字控制值和/或电阻分压器型电压基准的选择，作为数字控制源的替代。
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公开(公告)号：US08311243B2
公开(公告)日：2012-11-13
申请号：US11610496
申请日：2006-12-13
IPC分类号： H03F99/00
CPC分类号： H03G3/004 , H02M3/07 , H03F1/0227 , H03F1/025 , H03F3/183 , H03F2200/03 , H03F2200/211 , H03F2200/507 , H03G3/20 , H03G3/3031
摘要： An energy-efficient consumer device audio power output stage provides improved battery life and reduced power dissipation. A power supply having a selectable operating mode supplies the power supply rails to the power amplified output stage. The operating mode is controlled in conformity with the audio signal level, which may be determined from a volume control setting of the device and/or from a signal level detector that determines the amplitude of the signal being amplified. The power supply may be a charge pump in which the operating mode uses a capacitive divider to provide for selection of a power supply output voltage that is a rational fraction of the power supply output voltage in a full-voltage operating mode.
摘要翻译： 节能消费者设备音频功率输出级提供更好的电池寿命和更低的功耗。 具有可选操作模式的电源将电源轨提供给功率放大输出级。 操作模式根据音频信号电平进行控制，音频信号电平可以根据设备的音量控制设置和/或从确定被放大的信号的幅度的信号电平检测器确定。 电源可以是电荷泵，其中操作模式使用电容分压器来提供在全电压工作模式下选择作为电源输出电压的有效部分的电源输出电压。
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5.发明授权Operating environment and process position selected charge-pump operating mode in an audio power amplifier integrated circuit 有权操作环境和工艺位置选择电荷泵工作模式，在音频功率放大器集成电路中公开(公告)号：US07808324B1
公开(公告)日：2010-10-05
申请号：US12405485
申请日：2009-03-17
IPC分类号： H03F3/04
CPC分类号： H03F3/21 , H03F3/185 , H03F2200/468
摘要： A charge pump power supply for an audio power amplifier integrated circuit has an operating mode selected according to an indication of operating environment and/or a process position of the integrated circuit. The operating mode selects the output voltage provided by the charge pump and may also select efficiency by selecting a frequency of operation of the charge pump and/or the effective size of a switching transistor bank. The selection is made in conformity with an indication of a process position of the integrated circuit and/or an indication of an environment of the integrated circuit, such as temperature, power supply voltage and/or load impedance values, and generally also in conformity with a volume (gain) setting, or a detected signal level, so that internal power consumption of the amplifier and charge pump is reduced when a high signal level is not being reproduced at the audio power stage.
摘要翻译： 用于音频功率放大器集成电路的电荷泵电源具有根据操作环境的指示和/或集成电路的处理位置选择的操作模式。 操作模式选择由电荷泵提供的输出电压，还可以通过选择电荷泵的工作频率和/或开关晶体管组的有效尺寸来选择效率。 选择符合集成电路的处理位置的指示和/或集成电路的环境的指示，例如温度，电源电压和/或负载阻抗值，并且通常也符合 音量（增益）设置或检测到的信号电平，使得当在音频功率级不再现高信号电平时，放大器和电荷泵的内部功耗降低。
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公开(公告)号：US20080044041A1
公开(公告)日：2008-02-21
申请号：US11610496
申请日：2006-12-13
IPC分类号： H03F21/00
CPC分类号： H03G3/004 , H02M3/07 , H03F1/0227 , H03F1/025 , H03F3/183 , H03F2200/03 , H03F2200/211 , H03F2200/507 , H03G3/20 , H03G3/3031
摘要： An energy-efficient consumer device audio power output stage provides improved battery life and reduced power dissipation. A power supply having a selectable operating mode supplies the power supply rails to the power amplified output stage. The operating mode is controlled in conformity with the audio signal level, which may be determined from a volume control setting of the device and/or from a signal level detector that determines the amplitude of the signal being amplified. The power supply may be a charge pump in which the operating mode uses a capacitive divider to provide for selection of a power supply output voltage that is a rational fraction of the power supply output voltage in a full-voltage operating mode.
摘要翻译： 节能消费者设备音频功率输出级提供更好的电池寿命和更低的功耗。 具有可选操作模式的电源将电源轨提供给功率放大输出级。 操作模式根据音频信号电平进行控制，音频信号电平可以根据设备的音量控制设置和/或从确定被放大的信号的幅度的信号电平检测器确定。 电源可以是电荷泵，其中操作模式使用电容分压器来提供在全电压工作模式下选择作为电源输出电压的有效部分的电源输出电压。
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公开(公告)号：US20140050330A1
公开(公告)日：2014-02-20
申请号：US13588021
申请日：2012-08-17
IPC分类号： H04R1/10
CPC分类号： H04R3/00 , H04R5/033 , H04R5/04 , H04R29/00 , H04R2420/05
摘要： A circuit including headset type detection provides compatibility with different transducer types, such as headphones provided by different manufacturers. An audio circuit that generates or receives an audio signal includes electrical terminals for coupling to a transducer device, at least one of which carries the audio signal. A transducer device type detection circuit is included and detects a type of a transducer device coupled to the audio device from characteristics measured at the multiple electrical terminals when the transducer is coupled to the audio device. The circuit also includes a configuration control circuit for altering a configuration of the audio device according to a detected type of the transducer device.
摘要翻译： 包括耳机类型检测的电路提供与不同传感器类型的兼容性，例如由不同制造商提供的耳机。 产生或接收音频信号的音频电路包括用于耦合到换能器装置的电端子，其中至少一个承载音频信号。 包括传感器装置类型检测电路，并且当换能器耦合到音频装置时，根据在多个电端子处测量的特性来检测耦合到音频装置的换能器装置的类型。 电路还包括配置控制电路，用于根据检测到的换能器装置的类型改变音频装置的配置。
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8.发明授权Delta-sigma modulators with double sampling input networks and systems using the same 有权具有双采样输入网络的Delta-Σ调制器和使用它们的系统公开(公告)号：US07167119B1
公开(公告)日：2007-01-23
申请号：US11312882
申请日：2005-12-20
IPC分类号： H03M3/00
摘要： A method of sampling an input signal in a delta-sigma modulator having at least an integrator stage and a feedback digital-to-analog converter (DAC) stage includes sampling an input signal at a sampling rate by alternately utilizing the two sampling capacitors during two sampling cycles such that the two sampling capacitors are each being utilized at half the rate of the sampling rate. Samples from the two sampling capacitors are summed at the sampling rate at an intermediate node with a feedback samples provided by the feedback DAC stage at the sampling rate to generate output samples which are output from integrator stage at the sampling rate.
摘要翻译： 在至少具有积分器级和反馈数模转换器（DAC）级的Δ-Σ调制器中对输入信号进行采样的方法包括以两个采样电容器在两个采样电容器期间交替地利用采样率对输入信号进行采样 采样周期使得两个采样电容器分别以采样率的一半的速率被使用。 来自两个采样电容器的样本以中间节点处的采样率相加，其中反馈DAC级以采样率提供反馈样本，以产生以采样率从积分器级输出的输出采样。
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