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    METHOD AND APPARATUS FOR ULTRA-LOW POWER SWITCHING MICROPHONE
    143.
    发明申请
    METHOD AND APPARATUS FOR ULTRA-LOW POWER SWITCHING MICROPHONE 有权
    用于超低功率开关麦克风的方法和装置

    公开(公告)号：US20150215698A1

    公开(公告)日：2015-07-30

    申请号：US14600026

    申请日：2015-01-20

    Applicant: DSP Group LTD.

    Inventor： Moshe Haiut

    IPC: H04R3/00

    CPC classification number: H04R3/00 ,  H04R1/04 ,  H04R2201/003

    Abstract: A scheme is described to switch the power supply to the MEMS microphone on and off in a cyclic manner that is synchronized with the associated ADC sampling rate. In this way the MEMS microphone amplifier, whether it is a J-FET transistor or an operational amplifier, is off most of the cycle time, and is turned on only for a few micro-seconds prior to the sample-and-hold timing of the ADC device. By this method, the average power consumption of an existing analog MEMS microphone can be reduced by a factor of 10 or more.

    Abstract translation: 描述了以与关联的ADC采样率同步的循环方式将MEMS麦克风的电源切换到MEMS麦克风的方案。 以这种方式，无论是J-FET晶体管还是运算放大器，MEMS麦克风放大器在大部分周期时间内都处于关闭状态，并且在采样保持定时之前仅打开几微秒， ADC器件。 通过这种方法，现有的模拟MEMS麦克风的平均功耗可以降低10倍或更多。

    BEACON JITTER PREDICTION FOR WIRELESS LOCAL AREA NETWORK (LAN) DEVICES
    144.
    发明申请
    BEACON JITTER PREDICTION FOR WIRELESS LOCAL AREA NETWORK (LAN) DEVICES 有权
    无线局域网（LAN）设备的BEACON JITTER预测

    公开(公告)号：US20140376432A1

    公开(公告)日：2014-12-25

    申请号：US14298987

    申请日：2014-06-09

    Applicant: DSP Group LTD.

    Inventor： Graham Kenneth Smith

    IPC: H04W52/02

    CPC classification number: H04W52/0206 ,  H04W52/0225 ,  H04W52/0232 ,  H04W84/12 ,  H04W88/02 ,  Y02D70/00 ,  Y02D70/142

    Abstract: A method for activating a wireless communication device, the method may include receiving, by the wireless communication device, a sequence of periodic transmissions; estimating, for each periodic transmission of the sequence of periodic transmissions and before a reception of the periodic transmission, an expected time of arrival of the periodic transmission; calculating, for each periodic transmission, a timing difference attribute that is responsive to at least a difference between a timing of arrival of the periodic transmission and an expected time of arrival of the periodic transmission; selecting a selected periodic transmission out of the sequence of periodic transmissions, wherein the selected periodic transmission is associated with a smallest timing difference attribute out of the timing difference attributes associated with the periodic transmissions of the sequence of periodic transmissions; estimating, before a reception of a future periodic transmission that does not belong to the sequence of periodic transmissions, an estimated time of arrival of the future periodic transmission in response to the selecting of the selected periodic transmission and a periodic transmission period; determining a wakening time for wakening the wireless communication device in response to the estimated time of arrival of the future periodic transmission; and wakening the wireless communication device at the wakening time and searching for the future periodic transmission.

    Abstract translation: 一种用于激活无线通信设备的方法，所述方法可以包括：由所述无线通信设备接收周期性传输序列; 对于周期性传输序列的每个周期性传输以及在周期性传输的接收之前，估计周期性传输的预期到达时间; 对于每个周期性传输，计算响应周期性传输的到达定时与周期性传输的预期到达时间之间的差异的定时差异属性; 选择周期性传输序列中的选定的周期性传输，其中所选择的周期性传输与周期性传输序列的周期性传输相关联的定时差属性中的最小定时差属性相关联; 在接收到不属于周期性传输序列的未来周期性传输的接收之前，响应于选择的周期性传输的选择和周期性传输周期估计未来周期性传输的估计到达时间; 响应于未来周期性传输的预计到达时间，确定唤醒无线通信设备的唤醒时间; 并在唤醒时间唤醒无线通信设备，并寻找未来的周期性传输。

    LOW POWER ACTIVATION OF A VOICE ACTIVATED DEVICE
    145.
    发明申请
    LOW POWER ACTIVATION OF A VOICE ACTIVATED DEVICE 有权
    语音激活装置的低功率激活

    公开(公告)号：US20140337036A1

    公开(公告)日：2014-11-13

    申请号：US14272544

    申请日：2014-05-08

    Applicant: DSP Group LTD.

    Inventor： Moshe Haiut ,  Arie Heiman ,  Uri Yehuday

    IPC: G10L15/20 ,  G06F1/32 ,  G06F3/16

    CPC classification number: G10L15/20 ,  G06F1/3265 ,  G06F3/167 ,  G10L15/28 ,  G10L25/78

    Abstract: In a mobile device, a bone conduction or vibration sensor is used to detect the user's speech and the resulting output is used as the source for a low power Voice Trigger (VT) circuit that can activate the Automatic Speech Recognition (ASR) of the host device. This invention is applicable to mobile devices such as wearable computers with head mounted displays, mobile phones and wireless headsets and headphones which use speech recognition for the entering of input commands and control. The speech sensor can be a bone conduction microphone used to detect sound vibrations in the skull, or a vibration sensor, used to detect sound pressure vibrations from the user's speech. This VT circuit can be independent of any audio components of the host device and can therefore be designed to consume ultra-low power. Hence, this VT circuit can be active when the host device is in a sleeping state and can be used to wake the host device on detection of speech from the user. This VT circuit will be resistant to outside noise and react solely to the user's voice.

    Abstract translation: 在移动设备中，使用骨传导或振动传感器来检测用户的语音，并将所得到的输出用作可以激活主机的自动语音识别（ASR）的低功率语音触发（VT）电路的源 设备。 本发明可应用于诸如具有头戴式显示器的可穿戴计算机，移动电话和无线耳机以及使用语音识别来输入输入命令和控制的耳机的移动设备。 语音传感器可以是用于检测颅骨中的声音振动的骨传导麦克风或用于检测来自用户的语音的声压振动的振动传感器。 该VT电路可以独立于主机设备的任何音频组件，因此可以被设计为消耗超低功耗。 因此，当主机处于睡眠状态时，该VT电路可以是活动的，并且可以用于在从用户检测到语音时唤醒主机设备。 该VT电路将抵抗外部噪声，并仅对用户的声音作出反应。

    HIGH POWER HIGH ISOLATION LOW CURRENT CMOS RF SWITCH
    150.
    发明申请
    HIGH POWER HIGH ISOLATION LOW CURRENT CMOS RF SWITCH 审中-公开
    高功率高隔离低电流CMOS射频开关

    公开(公告)号：US20130252562A1

    公开(公告)日：2013-09-26

    申请号：US13836698

    申请日：2013-03-15

    Applicant: DSP Group, Ltd.

    Inventor： Yaron Hasson ,  Alex Mostov

    IPC: H04B1/44

    CPC classification number: H04B1/44

    Abstract: A novel and useful RF switch that comprises four transistors configured to have four operating states, wherein at any time at most one transistor is in ‘on’ state. The switch is an on-chip switch and is constructed in using CMOS processes and technology. The switch is optionally a double pole, double throw (DPDT) switch. The switch can be used in numerous mobile devices such as a cellular phone or in the handset or base station of a cordless phone. The switch optionally selects between two antennas and between transmitter and receiver circuits. Within the switch, at least one of the at least four transistors is optionally an N-channel Metal Oxide Semiconductor (NMOS) transistor. The switch can further comprise one or more logic control circuits providing biasing voltages to one or more of the transistors. Within the switch, the control circuit comprises logic components for providing appropriate biasing voltages to the drain, source and gate terminals of the transistors in the switch.

    Abstract translation: 一种新颖且有用的RF开关，其包括配置成具有四个工作状态的四个晶体管，其中在任何时间至多一个晶体管处于“导通”状态。 该开关是片上开关，采用CMOS工艺和技术构建。 该开关可选择是双极双掷（DPDT）开关。 该交换机可以用于许多移动设备，例如蜂窝电话或无绳电话的手机或基站中。 该交换机可选择在两个天线之间以及发射机和接收机之间进行选择。 在开关内，至少四个晶体管中的至少一个晶体管可选地是N沟道金属氧化物半导体（NMOS）晶体管。 开关还可以包括向一个或多个晶体管提供偏置电压的一个或多个逻辑控制电路。 在开关内，控制电路包括用于向开关中的晶体管的漏极，源极和栅极端子提供适当偏置电压的逻辑部件。

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