公开(公告)号：EP2138961A1

公开(公告)日：2009-12-30

申请号：EP09251325.8

申请日：2009-05-15

Applicant: Renesas Technology Corp.

Inventor： Toriyama, Akihiro ,  Watanabe, Kazuki

IPC: G06K19/07

CPC classification number: G06K19/0723 ,  G06K19/0724

Abstract: A semiconductor integrated circuit and an IC card mounted with the same are provided, in which a signal of any one of at least three kinds of reception signals can be received for a short time. An RF signal from an antenna is supplied in parallel to a first and a second demodulator circuit included in a demodulator circuit. The first demodulator circuit demodulates a first reception signal of a first degree of modulation. The second demodulator circuit demodulates a second reception signal having a first communication start signal (SOF), and a third reception signal having a second communication start signal (Preamble). The demodulated output signals of the first and the second demodulator circuit are supplied to a determination circuit. When the demodulation output by the first demodulator circuit is determined, it is determined that the first reception signal is currently received. When the demodulation output of the second reception signal by the second demodulator circuit is determined, it is determined that the second reception signal is currently received. When the demodulation output of the third reception signal by the second demodulator circuit is determined, it is determined that the third reception signal is currently received.

Abstract translation: 安装有被设置在同一，其中至少3种接收信号中的任何一个的信号可以在短时间内接收的半导体集成电路和IC卡。 从天线的RF信号被供给在平行于第一和包括在解调器电路中的第二解调器电路。 第一解调器电路解调调制的第一程度的第一接收信号。 第二解调器电路解调具有第一通信开始信号（SOF）的第二接收信号，并具有第二通信开始信号（前导）的第三接收信号。 第一和第二解调器电路的解调输出信号被提供给一个判断电路。 当由所述第一解调器电路输出的解调确定性开采，可以确定性开采并目前接收到的第一接收信号。 当由第二解调器电路解调输出的第二接收信号的被确定的开采，其确定性开采并目前接收到的第二接收信号。 当由第二解调器电路解调输出的第三接收信号的被确定的开采，其确定性开采没有当前接收所述第三接收信号。