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    • 8. 发明授权
    • Chip for non-contact reader/writer having power-supply management function
    • 具有电源管理功能的非接触式读写器芯片
    • US07554383B2
    • 2009-06-30
    • US10258651
    • 2002-03-04
    • Shigeru ArisawaAkihiko Yamagata
    • Shigeru ArisawaAkihiko Yamagata
    • G11C5/14
    • G06K19/0712G06K7/10237G06K19/0707G06K19/0723H02J5/00H02J5/005H02J50/20Y10T307/50Y10T307/696Y10T307/702
    • The present invention relates to a semiconductor integrated-circuit device capable of seamlessly switching a power source obtained by rectifying a carrier wave and an external power source. The semiconductor integrated-circuit device having a non-contact card function and a non-contact reader/writer function includes a rectifier 131 for rectifying a received carrier wave, a serial regulator 132for obtaining a predetermined voltage from an output voltage of the rectifier 131, and a power-supply control circuit 138 for turning on/off the voltage from a battery 160. In a case where the output voltage of the battery 160 is equal to or higher than a predetermined voltage, the power-supply control circuit 138 selects the voltage of the battery 160 as power required for operation of an IC 300 when a reader/writer mode signal or a card mode signal is received. On the other hand, when the output voltage of the battery 160 is lower than the predetermined voltage, the power-supply control circuit 138 selects the output voltage from the rectifier 131 as power required for operation of the IC 300. The present invention can be applied to a portable terminal, such as a cellular phone.
    • 本发明涉及一种半导体集成电路装置,能够无缝切换通过对载波进行整流而得到的电源和外部电源。 具有非接触卡功能和非接触式读写器功能的半导体集成电路装置包括用于整流接收的载波的整流器131,用于从整流器131的输出电压获得预定电压的串行调节器132, 以及用于打开/关闭来自电池160的电压的电源控制电路138.在电池160的输出电压等于或高于预定电压的情况下,电源控制电路138选择 当接收到读取器/写入器模式信号或卡模式信号时,电池160的电压作为IC 300的操作所需的功率。 另一方面,当电池160的输出电压低于预定电压时,电源控制电路138选择来自整流器131的输出电压作为IC 300的操作所需的功率。本发明可以是 应用于诸如蜂窝电话的便携式终端。