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公开(公告)号：US08610456B2
公开(公告)日：2013-12-17
申请号：US13241516
申请日：2011-09-23
IPC分类号： H03K17/16
CPC分类号： H04L25/0278
摘要： A buffer amplifier has a power on state and a sleep state. During regular operation a coupling state of a load to an output node is detected using feedback voltage. In a sleep mode and in a power collapse mode a detection current is injected into the output node, to produce a voltage, and the coupling state of the load is detected from the voltage. Optionally, the detection current and detecting of the voltage on the output node is enables by a low duty cycle clock. Optionally, signals generated in detecting the coupling state are qualified through a debounce circuit.
摘要翻译： 缓冲放大器具有通电状态和睡眠状态。 在正常操作期间，使用反馈电压来检测负载到输出节点的耦合状态。 在睡眠模式和功率崩溃模式中，检测电流被注入到输出节点中以产生电压，并且从电压检测负载的耦合状态。 可选地，通过低占空比时钟启用检测电流和输出节点上的电压检测。 可选地，通过去抖动电路来限定在检测耦合状态时产生的信号。
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公开(公告)号：US09119159B2
公开(公告)日：2015-08-25
申请号：US13206372
申请日：2011-08-09
CPC分类号： H04W52/0267 , G06F1/3212 , G06F1/325 , H03G3/001 , H03G3/007 , Y02D10/174 , Y02D70/00
摘要： To reduce the risk of brown outs and resets in a mobile station using a far-field speaker, a voltage level of a battery and a level of an input audio signal are monitored. When the level of the audio signal increases past a threshold level, and the voltage level of the battery falls below a threshold voltage, an attenuation is determined and applied to the audio signal. The applied attenuation reduces the volume of the audio signal, which reduces the risk of a brown out or a reset due to insufficient voltage in the mobile station.
摘要翻译： 为了降低使用远场扬声器的移动台中的褐色和复位的风险，监视电池的电压电平和输入音频信号的电平。 当音频信号的电平增加超过阈值电平，并且电池的电压降低到阈值电压以下时，确定衰减并将其应用于音频信号。 所应用的衰减减小了音频信号的音量，从而降低了由于移动台中电压不足导致的掉电或复位的风险。
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公开(公告)号：US20120177226A1
公开(公告)日：2012-07-12
申请号：US13206372
申请日：2011-08-09
IPC分类号： H03G3/00
CPC分类号： H04W52/0267 , G06F1/3212 , G06F1/325 , H03G3/001 , H03G3/007 , Y02D10/174 , Y02D70/00
摘要： To reduce the risk of brown outs and resets in a mobile station using a far-field speaker, a voltage level of a battery and a level of an input audio signal are monitored. When the level of the audio signal increases past a threshold level, and the voltage level of the battery falls below a threshold voltage, an attenuation is determined and applied to the audio signal. The applied attenuation reduces the volume of the audio signal, which reduces the risk of a brown out or a reset due to insufficient voltage in the mobile station.
摘要翻译： 为了降低使用远场扬声器的移动台中的褐色和复位的风险，监视电池的电压电平和输入音频信号的电平。 当音频信号的电平增加超过阈值电平，并且电池的电压降低到阈值电压以下时，确定衰减并将其应用于音频信号。 所应用的衰减减小了音频信号的音量，从而降低了由于移动台中电压不足导致的掉电或复位的风险。
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