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A wireless interface by inductive coupling achieves aggregated data rate of 195 Gb/s with power dissipation of 1.2W among 4-stacked chips in a package where 195 transceivers with the data rate of 1 Gb/s/channel are arranged in 50-μm pitch in 0.25-μm CMOS technology. By thinning chip thickness to 10μm, the interface communicates at distance of 15 μm at minimum and 43 μm at maximum. A low-power single-end transmitter achieves 55% power reduction for multiple connections. The transmit power is dynamically controlled in accordance with communication distance to reduce not only power dissipation but also crosstalk.
Date of Publication: Jan. 2006