A 20-Gb/s Transmitter With Adaptive Preemphasis in 65-nm CMOS Technology

A 20-Gb/s transmitter with two-tap adaptive preemphasis is presented. For the channels with different lengths, the tap coefficients are adjusted by detecting the propagation time through a channel. This adaptive transmitter is fabricated in 65-nm CMOS technology. The maximum power consumption from a...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2010-05, Vol.57 (5), p.319-323
Main Authors: Kao, Shih-Yuan, Liu, Shen-Iuan
Format: Article
Language:English
Subjects:
Adaptation
Channels
Circuits
CMOS
CMOS technology
Coaxial cables
Communication cables
Copper
Energy consumption
intersymbol interference (ISI)
Jitter
Loss measurement
Mean square values
preemphasis
Pseudorandom binary sequences
Root mean square
Roots
Semiconductor device measurement
serial-link application
transmitter
Transmitters
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Summary:A 20-Gb/s transmitter with two-tap adaptive preemphasis is presented. For the channels with different lengths, the tap coefficients are adjusted by detecting the propagation time through a channel. This adaptive transmitter is fabricated in 65-nm CMOS technology. The maximum power consumption from a 1.2-V supply is 58.8 mW, and the chip area occupies 1.05 × 0.85 mm 2 . For a 2-m coaxial copper cable with a 12.78-dB loss, the measured root mean square and peak-to-peak jitter of the recovered data are 2.56 and 18.67 ps, respectively, for a 20-Gb/s pseudorandom binary sequence of 2 31 -1. The measured bit error rate is less than 10 -12 .
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2010.2047316