公开(公告)号：US20150188311A1

公开(公告)日：2015-07-02

申请号：US14642002

申请日：2015-03-09

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kiyoshi KATO ,  Asami TADOKORO

IPC: H02H9/02

CPC classification number: H02H9/02 ,  G06K19/0701 ,  G06K19/0715 ,  G06K19/0723 ,  H01Q1/2208 ,  H01Q1/2283 ,  Y10T307/858

Abstract: Of a wireless communication system, an RF tag which can operate normally even when a communication distance is extremely short, like the case where the RF tag is in contact with a reader/writer, whereby the reliability is improved. The RF tag which communicates data by wireless communication includes a comparison circuit which compares electric power supplied from outside with reference electric power and a protection circuit portion which is operated when the electric power supplied from outside is higher than the reference electric power in the comparison circuit.

Abstract translation: 在无线通信系统中，即使在通信距离非常短的情况下也能正常工作的RF标签，与RF标签与读写器接触的情况一样，由此提高了可靠性。 通过无线通信进行数据通信的RF标签包括比较电路，其将从外部供给的电力与参考电力进行比较，以及当从外部供电的电力高于比较电路中的基准电力时工作的保护电路部分 。