Power reception circuits for a device receiving an AC power signal
    1.
    发明授权
    Power reception circuits for a device receiving an AC power signal 失效
    用于接收AC电力信号的设备的电力接收电路

    公开(公告)号:US6134130A

    公开(公告)日:2000-10-17

    申请号:US356427

    申请日:1999-07-19

    摘要: Power reception circuits employable in portable data devices (e.g., smart cards) to derive power and/or data from an input AC power signal (e.g., an ASK modulated carrier signal). In one embodiment, the power reception circuit comprises a power rectifier (120), a shunt rectifier (142) and a shunting element (132). The power rectifier (120) is adapted to rectify the input power signal, yielding a rectified output waveform. The shunt rectifier (142) is connected in parallel with the power rectifier (120). The shunting element (132) is connected to the shunt rectifier (142) and is operable to regulate an output voltage or current waveform produced at the output of the power rectifier (120). In another embodiment, the power reception circuit includes an analog circuit (610) for recovering data from a modulated carrier signal. A decoupling device (630) isolates the analog circuit (610) from impedance variations of a load. A shunt device (640) diverts undesired current from the load.

    摘要翻译: 功率接收电路可用于便携式数据设备(例如,智能卡)中以从输入AC功率信号(例如,ASK调制载波信号)导出功率和/或数据。 在一个实施例中,功率接收电路包括功率整流器(120),并联整流器(142)和分流元件(132)。 功率整流器(120)适于对输入功率信号进行整流,产生经整流的输出波形。 并联整流器(142)与电力整流器(120)并联连接。 分流元件(132)连接到并联整流器(142)并且可操作以调节在功率整流器(120)的输出处产生的输出电压或电流波形。 在另一个实施例中,功率接收电路包括用于从调制载波信号恢复数据的模拟电路(610)。 去耦装置(630)将模拟电路(610)与负载的阻抗变化隔离。 分流装置(640)从负载转移不需要的电流。

    Portable data device efficiently utilizing its available power and method thereof
    3.
    发明授权
    Portable data device efficiently utilizing its available power and method thereof 有权
    便携式数据设备有效利用其可用功率及其方法

    公开(公告)号:US06466126B2

    公开(公告)日:2002-10-15

    申请号:US09765684

    申请日:2001-01-19

    IPC分类号: G08B100

    摘要: A portable data device (400) having a power controller (430), a clock generator (428) and a digital circuit (432). The power controller (430) has an output signal. The output signal is representative of available power. The clock generator (428) is coupled to the output signal of the power controller (430) for generating a variable clock rate corresponding to the output signal. The digital circuit (432) is coupled to the clock generator (428), and the digital circuit (432) is controlled by the variable clock rate.

    摘要翻译: 一种具有功率控制器(430),时钟发生器(428)和数字电路(432)的便携式数据设备(400)。 功率控制器(430)具有输出信号。 输出信号代表可用功率。 时钟发生器(428)耦合到功率控制器(430)的输出信号,用于产生对应于输出信号的可变时钟速率。 数字电路(432)耦合到时钟发生器(428),数字电路(432)由可变时钟速率控制。