公开(公告)号：EP2573952A2

公开(公告)日：2013-03-27

申请号：EP12005502.5

申请日：2012-07-27

申请人： Broadcom Corporation

发明人： Royston, Philip ,  Wilson, Robin ,  Marholev, Bojko

IPC分类号： H04B5/02 ,  H04B5/00

CPC分类号： H04B5/0056 ,  H04B5/0031 ,  H04B5/02

摘要： An NFC-enabled device includes a load modulation communication section providing two or more selectable changes in the load impedance across the antenna terminals. At least one of the two or more selectable changes is dependent on both the transmit data and the concurrently detected strength of a tag reader field coupled to the NFC antenna.

摘要翻译： 启用NFC的设备包括提供在负载阻抗跨天线端子的两个或多个可选择的变化的负载调制通信部。 至少两个或多个可选择的变化之一是依赖于这两个发送数据和耦合到所述NFC天线标签读取器场的检测兼强度。

公开(公告)号：EP2675076A2

公开(公告)日：2013-12-18

申请号：EP12008622.8

申请日：2012-12-27

申请人： Broadcom Corporation

发明人： Wilson, Robin

IPC分类号： H04B5/00

CPC分类号： H04B5/0037 ,  H04B5/0056 ,  Y02D70/166 ,  Y02D70/22

摘要： An apparatus and method is disclosed to control NFC tag power dissipation. A first NFC device antenna harvests power for operation from a signal from another NFC device as a result of ambient magnetic fields present in the environment. The NFC device is configured with a regulator system in order to control the level of harvested power to prevent damage to the NFC device circuitry. The harvested power levels can exceed the ability of the regulator device to dissipate the additional power resulting in regulator damage or a reduction in the regulator lifetime. The power dissipation of the regulator can be monitored thermally, and the power dissipation controlled by reducing the regulation voltage accordingly. Various systems are presented to establish a cutoff threshold to the regulator power dissipation using thermal regulator feedback and/or antenna current monitoring.

摘要翻译： 公开了一种控制NFC标签功率耗散的装置和方法。 由于环境中存在的环境磁场，第一NFC设备天线从来自另一个NFC设备的信号中收获用于操作的电力。 NFC设备配置有调节器系统，以便控制收集的功率的水平以防止对NFC设备电路的损坏。 收获的功率电平可能会超过调节器器件消耗附加功率的能力，从而导致调节器损坏或调节器寿命缩短。 调节器的功耗可以通过热监测，并通过相应地减小调节电压来控制功耗。 提出了各种系统，以使用热调节器反馈和/或天线电流监测来建立调节器功率消耗的截止阈值。

公开(公告)号：EP2573952A3

公开(公告)日：2013-04-24

申请号：EP12005502.5

申请日：2012-07-27

申请人： Broadcom Corporation

发明人： Royston, Philip ,  Wilson, Robin ,  Marholev, Bojko

IPC分类号： H04B5/02 ,  H04B5/00

CPC分类号： H04B5/0056 ,  H04B5/0031 ,  H04B5/02

摘要： An NFC-enabled device includes a load modulation communication section providing two or more selectable changes in the load impedance across the antenna terminals. At least one of the two or more selectable changes is dependent on both the transmit data and the concurrently detected strength of a tag reader field coupled to the NFC antenna.