Shaped load modulation in a near field communications (NFC) device

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United States of America

PATENT NO 8725070
SERIAL NO

13271553

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Abstract

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A method and apparatus is disclosed to compensate for overshoot and/or undershoot in a transmission sequence by shaping the transmission sequence according to a shaping envelope to lengthen its rise time and/or fall time to provide a modified transmission sequence. The shaping envelope may represent a trigonometric function, a polynomial function, a piecewise function or any other function that lengthens the rise time and/or the fall time of the transmission sequence. The modified transmission sequence adjusts an impedance of an antenna to load modulate a carrier wave that is inductively coupled to it.

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Patent Owner(s)

  • BROADCOM CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Clarke, David S Swindon, GB 6 65

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