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A Low-Energy Inductive Coupling Transceiver With Cm-Range 50-Mbps Data Communication in Mobile Device Applications

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4 Author(s)
Seulki Lee ; Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea ; Kiseok Song ; Yoo, J. ; Hoi-Jun Yoo

A low-energy inductive coupling transceiver is proposed for Cm-range multimedia data transmission in mobile device applications. The Transmission Time Control (TTC) scheme is proposed to reduce the transmitter energy consumption to 0.475 pJ/b, and the Adaptive Gain Control (AGC) scheme is adopted to make the receiver energy consumption be 0.825 pJ/b. The planar-type inductor with self-resonance frequency of about 200 MHz fabricated on the flexible substrate achieves a data rate over 50 Mbps. To compensate for the weakly coupled channel, the receiver sensitivity is enhanced by the differential detection method (DDM) of the nodal voltages across the receiver inductor. With this method, the communication distance is increased up to 7 cm, and channel misalignment tolerance is enhanced up to 2 cm. The proposed transceiver is implemented within 1.5 × 2.37 mm2 in 0.18-μ m CMOS process and operates with 1-V supply.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:45 ,  Issue: 11 )

Date of Publication:

Nov. 2010

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