Supply voltage processing circuit and a data carrier with a supply
voltage processing unit
    1.
    发明授权
    Supply voltage processing circuit and a data carrier with a supply voltage processing unit 失效
    电源电压处理电路和数据载体与电源电压处理单元

    公开(公告)号:US5874829A

    公开(公告)日:1999-02-23

    申请号:US776419

    申请日:1997-06-24

    CPC分类号: G06K19/0723

    摘要: Two parallel regulator stages, each comprising a transistor (T1, T2, respectively), are provided. The transistor (T2) forms part of the indirect parallel regulator stage and acts directly on the rectifier. It is capable of taking up comparatively large currents and hence is comparatively slow. The transistor (T1) forms part of the direct regulator stage and operates in parallel with the sustaining capacitor. Because of the coarse control provided by the transistor (T2), it need take up small currents only and can hence have a very fast control behavior. Because of the coarse control by the transistor (T2), the alternating voltage on the antenna terminals (LA and LB) quickly breaks down when the RF signal is interrupted; consequently, the transmission rate can be increased in the case of pause interval modulation. Static discharges are also dissipated by the transistor (T2), so that no additional protective circuitry is required for this purpose.

    摘要翻译: PCT No.PCT / IB96 / 00517 Sec。 371日期:1997年6月24日 102(e)日期1997年6月24日PCT提交1996年12月5日PCT公布。 公开号WO96 / 38805 PCT。 日期1996年12月6日提供了两个并联调节器级,每个均包括晶体管(分别为T1,T2)。 晶体管(T2)形成间接并联调节器级的一部分,并直接作用于整流器。 能够承受比较大的电流,因此相对较慢。 晶体管(T1)形成直接调节级的一部分,并与维持电容并联工作。 由于由晶体管(T2)提供的粗略控制,它仅需要占用小电流,因此可以具有非常快的控制行为。 由于晶体管(T2)的粗略控制,当RF信号中断时,天线端子(LA和LB)上的交流电压迅速分解; 因此,在暂停间隔调制的情况下可以增加传输速率。 静电放电也被晶体管(T2)消散,因此不需要额外的保护电路。

    Dual-mode data carrier and circuit for such a data carrier with
potential equalizing means for equalizing the potentials of at least
two contact terminals
    2.
    发明授权
    Dual-mode data carrier and circuit for such a data carrier with potential equalizing means for equalizing the potentials of at least two contact terminals 有权
    双模式数据载体和电路用于具有用于均衡至少两个接触端子的电位的电位均衡装置的这种数据载体

    公开(公告)号:US6145749A

    公开(公告)日:2000-11-14

    申请号:US158628

    申请日:1998-09-22

    摘要: A data carrier (1) which can be operated in a contact-bound mode and in a contactless mode and a circuit (1A) for such a data carrier (1) has supply voltage generating means (35) for deriving a supply voltage (VDD), for various circuit sections of the data carrier (1) and of the circuit (1A), from a received useful HF signal (HF), and, in addition, potential equalizing circuit (94) by which at least two contact terminals (17A, 19A) each connected to a respective transmission contact (17, 19) can be brought at the same potential (ground).

    摘要翻译: 可以以接触方式和非接触模式操作的数据载体(1)和用于这种数据载体(1)的电路(1A)具有用于导出电源电压(VDD)的电源电压产生装置(35) ),对于数据载体(1)和电路(1A)的各个电路部分,从接收到的有用HF信号(HF),以及另外,电位均衡电路(94),至少两个接触端子 每个连接到相应的传输触点(17,19)的电荷(17A,19A)可以被带到相同的电位(地)。