Semiconductor device

Details Semiconductor device Semiconductor device

2011-07-26

2011-07-26

Zimmerman, Brian A (Department: 2612)

Communications: electrical

Selective

Interrogation response

C455S073000

Reexamination Certificate

active

07986216

ABSTRACT:
In a case where an ASK method is used for a communication method between a semiconductor device and a reader/writer, the amplitude of a radio signal is changed by data transmitted from the semiconductor device to the reader/writer when data is not transmitted from the reader/writer to the semiconductor device. Therefore, in some cases, the semiconductor device mistakes data transmitted from the semiconductor device itself for data transmitted from the reader/writer to the semiconductor device. The semiconductor device includes an antenna circuit, a transmission circuit, a reception circuit, and an arithmetic processing circuit. The antenna circuit transmits and receives a radio signal. The transmission circuit outputs to the reception circuit a signal showing whether or not the antenna circuit is transmitting the radio signal.

REFERENCES:
patent: 7245513 (2007-07-01), Watanabe et al.
patent: 2004/0072552 (2004-04-01), Park et al.
patent: 2005/0168339 (2005-08-01), Arai et al.
patent: 2005/0185737 (2005-08-01), Yamauchi
patent: 1767342 (2006-05-01), None
patent: 2001-244836 (2001-09-01), None
patent: 2005-346622 (2005-12-01), None
Search Report (Application No. 07011617.3) dated Aug. 12, 2009.
Chinese Office Action (Application No. 200710127902.1) dated Aug. 6, 2010.

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