Low-current radio-frequency transceiver for use in short-range duplex communications applications
    1.
    发明申请
    Low-current radio-frequency transceiver for use in short-range duplex communications applications 审中-公开
    用于短距离双工通信应用的低电流射频收发器

    公开(公告)号:US20080317105A1

    公开(公告)日:2008-12-25

    申请号:US11465105

    申请日:2006-08-16

    IPC分类号: H04B1/38

    CPC分类号: H04W52/028 Y02D70/144

    摘要: A low-current transceiver, powered by two small low-voltage batteries, for use in wireless headset/phoneset applications, such as hands-free headsets used with cellular telephones. Re-use of current from at least one circuit to provide power to at least one other power-consuming element of the transceiver, along with interrupt-driven control of the current made available to transmit and receive circuits, enables extended battery life (e.g., 120 hours). The headset/phoneset circuits incorporate a technique that draws an extremely low supply current from two low-voltage batteries while providing clear two-way communication over a range of about 3 meters.

    摘要翻译: 由两个小型低压电池供电的低电流收发器,用于无线耳机/手机应用中,例如与蜂窝电话一起使用的免提耳机。 从至少一个电路重新使用电流向收发器的至少一个其他功耗元件供电,同时中断驱动控制可用于发射和接收电路的电流,可延长电池寿命(例如, 120小时)。 耳机/手机电路采用了一种技术,可以从两个低压电池中提供极低的电源电流,同时在3米范围内提供清晰的双向通信。

    METHOD TO MANAGE PROTECTED FILE TRANSFERS BETWEEN PORTABLE MEDIA DEVICES
    2.
    发明申请
    METHOD TO MANAGE PROTECTED FILE TRANSFERS BETWEEN PORTABLE MEDIA DEVICES 审中-公开
    管理便携式媒体设备之间的保护文件传输的方法

    公开(公告)号:US20110087600A1

    公开(公告)日:2011-04-14

    申请号:US12377781

    申请日:2007-08-15

    IPC分类号: G06Q30/00 H04L9/28

    摘要: A method to authorize, facilitate, and mediate transfer of DRM protected files from one portable multimedia player (1050) to another portable multimedia player (1080), while ensuring appropriate royalty payments are made to appropriate Copyright Owners A source i2i device includes a file transfer counting mechanism for monitoring and disabling the transfer of digital files between portable digital media devices, and further includes hardware for providing a secure Internet interface (1020) capable of connecting the source device a Credit Vendor server (1040) via a network-connected computer (1070) A Credit Vendor (1000) pays a fee to a DRM File Source Company (1010) to obtain virtual credits for transferring DRM files The user connects the source i2i device to the Credit Vendor server (1040) via a global computer network and downloads virtual credits, which authorize and enable the transfer of content between the source i2i device and a target i2i device The Credit Vendor (1000) then pays appropriate royalties to the Copyright holders.

    摘要翻译: 授权,促进和中介DRM受保护的文件从一个便携式多媒体播放器(1050)传输到另一个便携式多媒体播放器(1080)的方法,同时确保适当的版权所有者进行适当的版权所有者源i2i设备包括文件传输 用于监视和禁用便携式数字媒体设备之间的数字文件传输的计数机制,还包括用于提供安全的因特网接口(1020)的硬件,该安全的因特网接口能够经由网络连接的计算机(1040)连接信源供应商服务器(1040) 1070)信用供应商(1000)向DRM文件源公司(1010)支付费用以获取用于传送DRM文件的虚拟信用用户通过全球计算机网络将源i2i设备连接到信用供应商服务器(1040),并下载 授权和启用源i2i设备和目标i2i设备之间的内容传输的虚拟信用信用供应商(1000)然后p ays版权所有者适用特许权使用费。

    Headphone receiver apparatus for use with low power transmitters
    4.
    发明授权
    Headphone receiver apparatus for use with low power transmitters 失效
    用于低功率发射机的耳机接收机

    公开(公告)号:US07532718B2

    公开(公告)日:2009-05-12

    申请号:US11033230

    申请日:2005-01-10

    摘要: A headphone receiver apparatus for use with low power transmitters includes a pair of headphone speaker enclosures connected by a headband. An antenna element in the form of a spring steel band or a plastic cable/antenna band where one of the conductors is utilized as the antenna is configured generally concentric with but offset from the headband and the user's head by at least 0.5 inches over at least some length of the antenna. Low-noise performance is improved by a low noise amplifier incorporated before the receiver IC, and a bandpass filter interposed between the low noise amplifier and the receiver IC. A base-loading inductor is used to tune the antenna element to resonance, with or without capacative end-loading. Lumped inductors, ferrite beads, or a parallel resonant LC circuit may be used to isolate the shield conductor at RF frequencies, and/or to reduce the loading of the other conductors.

    摘要翻译: 用于低功率发射机的耳机接收机装置包括一对通过头带连接的耳机扬声器外壳。 弹簧钢带或塑料电缆/天线带形式的天线元件,其中一个导体被用作天线,被配置为与头带和使用者的头部同心但至少偏离了至少0.5英寸 一些天线的长度。 通过在接收器IC之前并入的低噪声放大器和插入在低噪声放大器和接收器IC之间的带通滤波器来提高低噪声性能。 使用基极负载电感器来调谐天线元件到共振,具有或不具有电容端载。 集成电感器,铁氧体磁珠或并联谐振LC电路可用于隔离RF频率处的屏蔽导体和/或减少其它导体的负载。

    Circuit and method for providing an auto-off capability for a wireless transmitter
    5.
    发明授权
    Circuit and method for providing an auto-off capability for a wireless transmitter 失效
    用于为无线发射机提供自动关闭能力的电路和方法

    公开(公告)号:US07627353B2

    公开(公告)日:2009-12-01

    申请号:US11680936

    申请日:2007-03-01

    IPC分类号: H04B1/38 H04B1/04

    CPC分类号: H04B1/04

    摘要: A circuit and method for providing an auto-off capability for a wireless transmitter, of a type having an audio plug which mates with the output jack of an audio source. The portable transmitter modulates signals from a baseband signal source onto a carrier and transmits the RF carrier to a receiver. The auto-off capability is provided to prolong battery life and eliminate the transmission of unmodulated RF carriers. The auto-off capability comprises turning power off to the transmitter circuit when baseband input signal is absent for more than a predetermined amount of time, and immediately turning on the transmitter circuit when baseband signal is present.

    摘要翻译: 一种用于为无线发射器提供自动关闭能力的电路和方法,其具有与音频源的输出插孔相配合的音频插头的类型。 便携式发射机将信号从基带信号源调制到载波上,并将RF载波发射到接收机。 提供自动关闭功能以延长电池寿命并消除未调制的RF载体的传输。 自动关闭功能包括当基带输入信号不存在超过预定时间量时关断发射机电路,并且当存在基带信号时立即接通发射机电路。

    Circuit and method for providing an auto-off and/or auto-on capability for an audio device
    6.
    发明授权
    Circuit and method for providing an auto-off and/or auto-on capability for an audio device 失效
    用于为音频设备提供自动关闭和/或自动启用能力的电路和方法

    公开(公告)号:US07474757B2

    公开(公告)日:2009-01-06

    申请号:US10540070

    申请日:2004-01-09

    IPC分类号: H03F21/00 G10H1/00

    摘要: A circuit (FIGS. 2A-2D) and method of providing an auto-on and/or auto-off capability for an audio device, of a type having an audio plug (14) which mates with the output jack of an audio source. The portable transmitter (10) modulates audio signals from the audio source onto a carrier and transmits them to a receiver. The auto-on and auto-off capability is provided to prolong battery life and degradation of the transmitter circuit and comprises pinching off a FET (Q2) when the circuit is in an “off” state. This occurs when a pre-determined threshold in a capacitor is reached by not discharging that capacitor. The capacitor (C29) is discharged by dropping a comparator input below a pre-determined threshold limit when presented with an audio peak and wherein the drop in value causes the comparator output to go low, causing the capacitor to discharge and causing the FET (Q2) to supply power to the regulator.

    摘要翻译: 一种用于为音频设备提供自动启动和/或自动关闭能力的电路(图2A-2D),其具有与音频源的输出插孔相配合的音频插头(14)的类型。 便携式发射机(10)将来自音频源的音频信号调制到载波上并将其发送到接收机。 提供自动启动和自动关闭功能,以延长电池寿命和发射机电路的劣化,并且包括当电路处于“关闭”状态时夹紧FET(Q2)。 当通过不释放该电容器来达到电容器中的预定阈值时,会发生这种情况。 当呈现音频峰值时,通过将比较器输入降低到预定阈值极限以下来使电容器(C29)放电,并且其中该下降值使得比较器输出变低,使得电容器放电并引起FET(Q2 )向调节器供电。

    Circuit and method for providing an auto-off capability for a wireless transmitter
    7.
    发明授权
    Circuit and method for providing an auto-off capability for a wireless transmitter 失效
    用于为无线发射机提供自动关闭能力的电路和方法

    公开(公告)号:US07120403B2

    公开(公告)日:2006-10-10

    申请号:US10754148

    申请日:2004-01-09

    IPC分类号: H01Q11/12 H04B1/38 H04M1/00

    摘要: The invention is a circuit and method for providing an auto-off capability for a wireless transmitter, of a type having an audio plug which mates with the output jack of an audio source. The portable transmitter modulates audio signals from the audio source onto a carrier and transmits them to a receiver. The auto-off capability is provided to prolong battery life and degradation of the transmitter circuit and comprises pinching off a FET when the circuit is in an “off” state. This occurs when a pre-determined threshold in a capacitor is reached by not discharging that capacitor. The capacitor is discharged by dropping an input to a comparator below a pre-determined threshold limit when presented with an audio peak and wherein the drop in value causes the comparator output to discharge the capacitor and causing the FET to supply power to the regulator.

    摘要翻译: 本发明是一种用于为无线发射机提供自动关闭能力的电路和方法,该无线发射机具有与音频源的输出插孔相配合的音频插头的类型。 便携式发射机将来自音频源的音频信号调制到载波上并将其发送到接收机。 提供自动关闭功能以延长电池寿命和发射机电路的劣化,并且包括在电路处于“关闭”状态时夹断FET。 当通过不释放该电容器来达到电容器中的预定阈值时,会发生这种情况。 当呈现音频峰值时,通过将输入降低到低于预定阈值极限的比较器来放电电容器,并且其中该下降值使得比较器输出放电电容器并使FET向调节器供电。

    Hybrid Digital Digital/Analog Fm Multiplexer Transmitter
    8.
    发明申请
    Hybrid Digital Digital/Analog Fm Multiplexer Transmitter 审中-公开
    混合数字数字/模拟Fm多路复用器发射机

    公开(公告)号:US20080298456A1

    公开(公告)日:2008-12-04

    申请号:US12095903

    申请日:2006-12-02

    IPC分类号: H03K7/08

    CPC分类号: H04H20/34 H04H20/48

    摘要: An audio circuit digitizes raw analog input and uses a digital signal processor (DSP) to filter, modulate, and mix the input to produce a multiplex composite signal. The multiplex composite signal is output from the DSP through a digital/analog converter (DAC), and modulates a conventional FM RF stage. In a first preferred, hydrid embodiment, the composite signal is output from the DSP through a digital/analog converter (DAC), and modulates a conventional FM RF stage. In a second preferred, fully digital embodiment, carrier modulation takes place in the DSP, and FM modulated RF is output via a fast DAC for final filtering and radiation.

    摘要翻译: 音频电路将原始模拟输入数字化,并使用数字信号处理器(DSP)对输入进行滤波,调制和混合,以产生复用复合信号。 复用复合信号通过数模转换器(DAC)从DSP输出,并调制常规FM RF级。 在第一优选实施例中,复合信号通过数字/模拟转换器(DAC)从DSP输出,并且调制常规FM RF级。 在第二优选的全数字实施例中,在DSP中进行载波调制,并且FM调制RF通过快速DAC输出以用于最终滤波和辐射。

    CIRCUIT AND METHOD FOR PROVIDING AN AUTO-OFF CAPABILITY FOR A WIRELESS TRANSMITTER
    9.
    发明申请
    CIRCUIT AND METHOD FOR PROVIDING AN AUTO-OFF CAPABILITY FOR A WIRELESS TRANSMITTER 失效
    为无线发射机提供自动关闭能力的电路和方法

    公开(公告)号:US20080214122A1

    公开(公告)日:2008-09-04

    申请号:US11680936

    申请日:2007-03-01

    IPC分类号: H04B7/00

    CPC分类号: H04B1/04

    摘要: A circuit and method for providing an auto-off capability for a wireless transmitter, of a type having an audio plug which mates with the output jack of an audio source. The portable transmitter modulates signals from a baseband signal source onto a carrier and transmits the RF carrier to a receiver. The auto-off capability is provided to prolong battery life and eliminate the transmission of unmodulated RF carriers. The auto-off capability comprises turning power off to the transmitter circuit when baseband input signal is absent for more than a predetermined amount of time, and immediately turning on the transmitter circuit when baseband signal is present.

    摘要翻译: 一种用于为无线发射器提供自动关闭能力的电路和方法,其具有与音频源的输出插孔相配合的音频插头的类型。 便携式发射机将信号从基带信号源调制到载波上,并将RF载波发射到接收机。 提供自动关闭功能以延长电池寿命并消除未调制的RF载体的传输。 自动关闭功能包括当基带输入信号不存在超过预定时间量时关断发射机电路,并且当存在基带信号时立即接通发射机电路。