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Cancellation of crosstalk-induced jitter

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2 Author(s)
Buckwalter, J.F. ; California Inst. of Technol., Pasadena, CA, USA ; Hajimiri, A.

A novel jitter equalization circuit is presented that addresses crosstalk-induced jitter in high-speed serial links. A simple model of electromagnetic coupling demonstrates the generation of crosstalk-induced jitter. The analysis highlights unique aspects of crosstalk-induced jitter that differ from far-end crosstalk. The model is used to predict the crosstalk-induced jitter in 2-PAM and 4-PAM, which is compared to measurement. Furthermore, the model suggests an equalizer that compensates for the data-induced electromagnetic coupling between adjacent links and is suitable for pre- or post-emphasis schemes. The circuits are implemented using 130-nm MOSFETs and operate at 5-10 Gb/s. The results demonstrate reduced deterministic jitter and lower bit-error rate (BER). At 10 Gb/s, the crosstalk-induced jitter equalizer opens the eye at 10-12 BER from 17 to 45 ps and lowers the rms jitter from 8.7 to 6.3 ps.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:41 ,  Issue: 3 )