Applying Effective Dynamic Frequency Scaling Method in Contactless Smart Card

A creative dynamic frequency scaling method in contactless smart card is presented for the first time. A low power magnetic field detection circuit, a simple load detection circuit, the quick load comparator and the simple clock switch scheme in the method are also presented. The test result shows t...

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Veröffentlicht in:	IEEE transactions on very large scale integration (VLSI) systems 2012-10, Vol.20 (10), p.1828-1834
Hauptverfasser:	Wang, Mingyu, Min, Hao
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Circuit properties Clocks Communication distance contactless smart card Design. Technologies. Operation analysis. Testing Detectors dynamic frequency scaling (DFS) Electric, optical and optoelectronic circuits Electronic circuits Electronics Exact sciences and technology Frequency conversion Integrated circuits load detection circuit low power Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Smart cards Switching, multiplexing, switched capacity circuits transaction time
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Beschreibung
Zusammenfassung:	A creative dynamic frequency scaling method in contactless smart card is presented for the first time. A low power magnetic field detection circuit, a simple load detection circuit, the quick load comparator and the simple clock switch scheme in the method are also presented. The test result shows that the longest communication distance is improved from 6 to 8 cm compared to the same contactless smart card (CSC) chip using the fixed frequency divided by 4 and the transaction time is saved by 18% in average, compared to the same CSC chip using the fixed frequency divided by 8.
ISSN:	1063-8210 1557-9999
DOI:	10.1109/TVLSI.2011.2164560