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LOW POWER ALWAYS-ON MICROPHONE USING POWER REDUCTION TECHNIQUES
LOW POWER ALWAYS-ON MICROPHONE USING POWER REDUCTION TECHNIQUES
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机译:使用低功耗技术的低功耗始终开启麦克风
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摘要
An audio activity detector device is disclosed. The audio activity detector device comprises a closed loop feedback regulating circuit that supplies an input signal representative of a time-varying voltage signal to a quantizer circuit, wherein the quantizer circuit, as a function of the input signal, converts the input signal to a quantizer discrete-time signal; a first circuit that, as a function of the discrete-time signal, determines a key quantizer statistic value for the quantizer discrete-time signal; and a second circuit that, as a function of the key quantizer statistic value, determines a signal statistic value for the input signal and a gain control value.
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