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Future mobile device interconnections

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1 Author(s)
Voutilainen, M. ; Nokia Res. Center, Helsinki

The developed concept of ultra low power multi gigabit serial interface for mobile devices removes limits from mechanical design and device architectures. Power consumption of differential line drivers were reduced to 0.8 mW by lowering common-mode voltage of signals to 200 mV and using voltage source type drivers with 50-ohm output impedance to generate +-200 mV high-speed differential signal to receiver inputs. Lowering supply voltage to 200 mV and removing the parallel termination from receiver input are possible with voltage-source type driver when output impedance is matched to line impedance, providing additional 75% power saving without any change in receiver differential input signal. Zero idle power consumption of CMOS inverters makes them ideal single-ended drivers and receivers for short control messages using the same wires as high-speed drivers when no high-speed differential signaling is required.

Published in:

Signal Propagation on Interconnects, 2007. SPI 2007. IEEE Workshop on

Date of Conference:

13-16 May 2007