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    • 3. 发明授权
    • Method and apparatus for efficient mixed signal processing in a digital amplifier
    • 数字放大器中有效混合信号处理的方法和装置
    • US06765518B2
    • 2004-07-20
    • US10214239
    • 2002-08-07
    • Erlend OlsonIon Opris
    • Erlend OlsonIon Opris
    • H03M300
    • H03M7/3006H03F3/2173H03F2200/331H03M3/43H03M3/496H03M7/3031
    • A system and method of creating a highly efficient digital amplifier which can take either analog or digital inputs, and produce a high power accurate representation of the input to drive speakers or other low impedance load is described. The system employs a transition detector and delay unit which allows the comparator of the signal modulator to ignore its inputs for a pre-determined number of subsequent clock cycles once an output transition has been detected. Through the use of faster clocks and variable clock cycle skips upon the comparator's output transition, finer resolution of the feedback's clock period for noise-shaping purposes is achieved. Finer resolution of the clock period allows the present invention to employ a more aggressive noise-shaping than previously possible. In another aspect of the invention, additional delta-sigma modulator noise suppression is obtained by using the common bridge implementation of the power output stage with the improvement of configuring the bridge to create a 3-state condition instead of the conventional 2 states. By controlling the two halves of the bridge independently of one another, an output with 3 states makes for improved noise shaping performance.
    • 描述了一种创建高效数字放大​​器的系统和方法,该数字放大器可以采用模拟或数字输入,并且产生用于驱动扬声器或其他低阻抗负载的输入的高功率精确表示。 一旦检测到输出转换,该系统采用转换检测器和延迟单元,其允许信号调制器的比较器忽略其输入以用于预定数量的后续时钟周期。 通过使用更快的时钟和可变时钟周期跳过比较器的输出转换,实现了用于噪声整形的反馈时钟周期的更好的分辨率。 时钟周期的更好的分辨率允许本发明采用比先前可能的更积极的噪声整形。在本发明的另一方面,通过使用功率输出级的公共桥接实现来获得附加的Δ-Σ调制器噪声抑制, 改进配置桥以创建3状态而不是传统的2状态。 通过彼此独立地控制桥的两半,具有3个状态的输出改善了噪声整形性能。
    • 6. 发明授权
    • Wireless device authentication at mutual reduced transmit power
    • 相互降低发射功率的无线设备认证
    • US07991423B2
    • 2011-08-02
    • US12776660
    • 2010-05-10
    • Erlend OlsonKenton C. Murphy
    • Erlend OlsonKenton C. Murphy
    • H04Q7/20
    • H04W12/06H04L63/0492H04L63/08H04L63/104H04L63/1475H04W12/12H04W52/283H04W52/50H04W76/10H04W84/18
    • A system and method for facilitating the authentication of wireless devices in an environment with multiple wireless networks. A user wishing to join an operating wireless network can bring his wireless device within close physical proximity, for example, less than one meter, of a device in the network that he wishes to join. The user then presses an authenticate button, which causes both devices to enter a low transmission power mode. In such case, the devices are only capable of operation within the close proximity. Being in low power mode will diminish the possibility of eavesdropping on the authentication process. Power down mode also reduces the amount of message traffic in the area and saves scarce power and processing resources at the nodes, which are now out of range. Authentication then takes place in low power mode and once completed, both devices resume normal power levels and continue communicating normally.
    • 一种用于在具有多个无线网络的环境中促进无线设备的认证的系统和方法。 希望加入操作无线网络的用户可以使他的无线设备在他希望加入的网络中的设备的物理接近度(例如,小于一米)的物理上接近。 然后,用户按下认证按钮,这导致两个设备进入低发射功率模式。 在这种情况下,这些设备只能在紧邻内操作。 处于低功耗模式会降低窃取身份验证过程的可能性。 掉电模式还可以减少该区域的消息流量,并节省了节点的功耗和处理资源,现在这些节点超出了范围。 认证然后发生在低功率模式,一旦完成,两个设备恢复正常功率电平并继续正常通信。
    • 8. 发明授权
    • Wireless device authentication at mutual reduced transmit power
    • 相互降低发射功率的无线设备认证
    • US07734306B2
    • 2010-06-08
    • US11174983
    • 2005-07-05
    • Erlend OlsonK. C. Murphy
    • Erlend OlsonK. C. Murphy
    • H04Q7/20
    • H04W12/06H04L63/0492H04L63/08H04L63/104H04L63/1475H04W12/12H04W52/283H04W52/50H04W76/10H04W84/18
    • A system and method for facilitating the authentication of wireless devices in an environment with multiple wireless networks. A user wishing to join an operating wireless network can bring his wireless device within close physical proximity, for example, less than one meter, of a device in the network that he wishes to join. The user then presses an authenticate button, which causes both devices to enter a low transmission power mode. In such case, the devices are only capable of operation within the close proximity. Being in low power mode will diminish the possibility of eavesdropping on the authentication process. Power down mode also reduces the amount of message traffic in the area and saves scarce power and processing resources at the nodes, which are now out of range. Authentication then takes place in low power mode and once completed, both devices resume normal power levels and continue communicating normally.
    • 一种用于在具有多个无线网络的环境中促进无线设备的认证的系统和方法。 希望加入操作无线网络的用户可以使他的无线设备在他想要加入的网络中的设备的物理接近度(例如,小于一米)的物理上接近。 然后,用户按下认证按钮,这导致两个设备进入低发射功率模式。 在这种情况下,这些设备只能在紧邻内操作。 处于低功耗模式会降低窃取身份验证过程的可能性。 掉电模式还可以减少该区域的消息流量,并节省了节点的功耗和处理资源,现在这些节点超出了范围。 认证然后发生在低功率模式,一旦完成,两个设备恢复正常功率电平并继续正常通信。
    • 9. 发明申请
    • Method and apparatus for efficient mixed signal processing in a digital amplifier
    • 数字放大器中有效混合信号处理的方法和装置
    • US20050030093A1
    • 2005-02-10
    • US10921016
    • 2004-08-18
    • Erlend OlsonIon Opris
    • Erlend OlsonIon Opris
    • H03F3/217H03M3/02H03M7/32H03F3/38
    • H03M7/3006H03F3/2173H03F2200/331H03M3/43H03M3/496H03M7/3031
    • A system and method of creating a highly efficient digital amplifier which can take either analog or digital inputs, and produce a high power accurate representation of the input to drive speakers or other low impedance load is described. The system employs a transition detector and delay unit which allows the comparator of the signal modulator to ignore its inputs for a pre-determined number of subsequent clock cycles once an output transition has been detected. Through the use of faster clocks and variable clock cycle skips upon the comparator's output transition, finer resolution of the feedback's clock period for noise-shaping purposes is achieved. Finer resolution of the clock period allows the present invention to employ a more aggressive noise-shaping than previously possible. In another aspect of the invention; additional delta-sigma modulator noise suppression is obtained by using the common bridge implementation of the power output stage with the improvement of configuring the bridge to create a 3-state condition instead of the conventional 2 states. By controlling the two halves of the bridge independently of one another, an output with 3 states makes for improved noise shaping performance.
    • 描述了一种创建高效数字放大​​器的系统和方法,该数字放大器可以采用模拟或数字输入,并且产生用于驱动扬声器或其他低阻抗负载的输入的高功率精确表示。 一旦检测到输出转换,该系统采用转换检测器和延迟单元,其允许信号调制器的比较器忽略其输入以用于预定数量的后续时钟周期。 通过使用更快的时钟和可变时钟周期跳过比较器的输出转换,实现了用于噪声整形的反馈时钟周期的更好的分辨率。 时钟周期的更好的分辨率允许本发明采用比先前可能的更积极的噪声整形。 在本发明的另一方面; 通过使用功率输出级的公共桥接实现,通过改进配置桥以创建3态条件而不是传统的2状态来获得额外的Δ-Σ调制器噪声抑制。 通过彼此独立地控制桥的两半,具有3个状态的输出改善了噪声整形性能。