公开(公告)号：US10412485B2

公开(公告)日：2019-09-10

申请号：US15658582

申请日：2017-07-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Zhenyong Zhang ,  Wei Ma ,  Mikko Topi Loikkanen ,  Mark Kuhns

IPC: H04R3/00

Abstract: A duty-cycled acoustic sensor saves power, for example, by operating for relatively short periods of time in a repetitive manner. A sensor bias current provides operating power to the sensor. An output analog signal from the sensor carries the information induced by the sensor upon the bias signal. Capacitive coupling is employed to remove direct DC voltage from the output analog signal to generate an analog input signal for acoustic analysis. A capacitor for capacitive coupling is pre-charged to reduce the charging time of the capacitor as the sensor is being powered up. After the capacitor is sufficiently precharged, acoustic analysis is performed on the analog input signal. The sensor is powered down by substantially blocking current flow through the sensor, which saves power. Results of the acoustic analysis can be used, for example, to control parameters of the duty-cycling of the acoustic sensor.

公开(公告)号：US20170325022A1

公开(公告)日：2017-11-09

申请号：US15658582

申请日：2017-07-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Zhenyong Zhang ,  Wei Ma ,  Mikko Topi Loikkanen ,  Mark Kuhns

IPC: H04R3/00

CPC classification number: H04R3/00 ,  H04R2410/00

Abstract: A duty-cycled acoustic sensor saves power, for example, by operating for relatively short periods of time in a repetitive manner. A sensor bias current provides operating power to the sensor. An output analog signal from the sensor carries the information induced by the sensor upon the bias signal. Capacitive coupling is employed to remove direct DC voltage from the output analog signal to generate an analog input signal for acoustic analysis. A capacitor for capacitive coupling is pre-charged to reduce the charging time of the capacitor as the sensor is being powered up. After the capacitor is sufficiently precharged, acoustic analysis is performed on the analog input signal. The sensor is powered down by substantially blocking current flow through the sensor, which saves power. Results of the acoustic analysis can be used, for example, to control parameters of the duty-cycling of the acoustic sensor.

公开(公告)号：US09756420B2

公开(公告)日：2017-09-05

申请号：US14828977

申请日：2015-08-18

Applicant: Texas Instruments Incorporated

Inventor： Zhenyong Zhang ,  Wei Ma ,  Mikko Topi Loikkanen ,  Mark Kuhns

IPC: H02B1/00 ,  H04R3/00

CPC classification number: H04R3/00 ,  H04R2410/00

Abstract: A duty-cycled acoustic sensor saves power, for example, by operating for relatively short periods of time in a repetitive manner. A sensor bias current provides operating power to the sensor. An output analog signal from the sensor carries the information induced by the sensor upon the bias signal. Capacitive coupling is employed to remove direct DC voltage from the output analog signal to generate an analog input signal for acoustic analysis. A capacitor for capacitive coupling is pre-charged to reduce the charging time of the capacitor as the sensor is being powered up. After the capacitor is sufficiently precharged, acoustic analysis is performed on the analog input signal. The sensor is powered down by substantially blocking current flow through the sensor, which saves power. Results of the acoustic analysis can be used, for example, to control parameters of the duty-cycling of the acoustic sensor.

公开(公告)号：US20160212527A1

公开(公告)日：2016-07-21

申请号：US14828977

申请日：2015-08-18

Applicant: Texas Instruments Incorporated

Inventor： Zhenyong Zhang ,  Wei Ma ,  Mikko Topi Loikkanen ,  Mark Kuhns

IPC: H04R3/00 ,  H04R29/00

CPC classification number: H04R3/00 ,  H04R2410/00

Abstract: A duty-cycled acoustic sensor saves power, for example, by operating for relatively short periods of time in a repetitive manner. A sensor bias current provides operating power to the sensor. An output analog signal from the sensor carries the information induced by the sensor upon the bias signal. Capacitive coupling is employed to remove direct DC voltage from the output analog signal to generate an analog input signal for acoustic analysis. A capacitor for capacitive coupling is pre-charged to reduce the charging time of the capacitor as the sensor is being powered up. After the capacitor is sufficiently precharged, acoustic analysis is performed on the analog input signal. The sensor is powered down by substantially blocking current flow through the sensor, which saves power. Results of the acoustic analysis can be used, for example, to control parameters of the duty-cycling of the acoustic sensor.

Abstract translation: 占空比的声学传感器例如通过以重复的方式操作相对短的时间段来节省功率。 传感器偏置电流为传感器提供工作电源。 来自传感器的输出模拟信号承载由偏置信号传感器感应的信息。 电容耦合用于从输出模拟信号中去除直接的直流电压，以产生用于声学分析的模拟输入信号。 用于电容耦合的电容器被预充电，以在传感器上电时减小电容器的充电时间。 在电容充分预充电之后，对模拟输入信号执行声学分析。 传感器通过基本上阻挡通过传感器的电流来断电，从而节省电力。 声学分析的结果可以用于例如控制声学传感器的占空比的参数。