Abstract
A low-energy inductive coupling transceiver is pro- posed for Cm-range multimedia data transmission in mobile device applications. The Transmission Time Control (TTC) scheme is pro- posed 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 in- ductor with self-resonance frequency of about 200 MHz fabricated on the flexible substrate achieves a data rate over 50 Mbps. To com- pensate 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 com- munication distance is increased up to 7 cm, and channel misalign- ment tolerance is enhanced up to 2 cm. The proposed transceiver is implemented within 1.5 2.37 mm/50in 0.18- m CMOS process and operates with 1-V supply.