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32 GS/s ultra-high-speed UWB sampling circuit for portable imaging system

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4 Author(s)
Toya, A. ; Res. Inst. for Nanodevice & Bio Syst., Hiroshima Univ., Hiroshima, Japan ; Sasaki, N. ; Kubota, S. ; Kikkawa, T.

A 32 GS/s ultra-high-speed ultra-wideband (UWB) sampling circuit has been developed by use of a 65 nm CMOS technology. An equivalent time sampling technique was applied using an internal clock generator to achieve its low power consumption and high sampling rate. The generator consists of an eight-stage 2 GHz phase-locked loop, a 16-to-1 multiplexer and a frequency divider. Both a 20 mW low power consumption and a 32 GS/s high sampling rate were achieved. Gaussian monocycle pulse signals with a centre frequency of 450 MHz could be successfully converted to digital codes.

Published in:

Electronics Letters  (Volume:47 ,  Issue: 3 )