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Monolithic current-sensing topology for system-on-chip applications

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2 Author(s)
Keikhosravy, K. ; Dept. of Electr. & Comput. Eng., Univ. of Bristish Columbia, Vancouver, BC, Canada ; Mirabbasi, S.

A passive current-sensing architecture operating based on electromotive force phenomena is presented. The proposed architecture is capable of sensing a varying current over a wide range of frequencies. Simulation and measurement results of a proof-of-concept prototype implemented in a 0.13 μm CMOS confirm the performance of the presented technique for currents with frequencies up to 8 GHz. In the presented experimental results, the high-frequency performance limit is due to the measurement setup. Furthermore, the method can be used to sense currents over a wide range of amplitudes and the amplitude detection sensitivity of the technique improves as the frequency of the current signal being measured increases.

Published in:

Electronics Letters  (Volume:48 ,  Issue: 21 )