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5-6.4 Gbps 12 channel transceiver with pre-emphasis and equalizer

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11 Author(s)
Higashi, H. ; Fujitsu Labs. Ltd., Kawasaki, Japan ; Masaki, S. ; Kibune, M. ; Matsubara, S.
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A 5 Gbps to 6.4 Gbps transceiver consists of a parallel 12-channel transmitter (Tx), 12-channel receiver (Rx), clock generators based on LC-VCO PLLs, and a clock recovery unit. The Tx has a 5-tap pre-emphasis filter, and the Rx has an equalizer with intersymbol interference (ISI) monitor. Monitoring the ISI enables a fine adjustment of the loss compensation. The pre-emphasis filter in the Tx and the equalizer in the Rx can compensate for a transmission loss of up to 20 dB and 15 dB at 6.4 Gbps, respectively. The areas of the Tx and Rx channels including the PLLs are both 3.92 mm2. The transmitter dissipates 150 mW/channel at 6.4 Gbps when compensating for a loss of 20 dB, the receiver 90 mW/channel when compensating for 15 dB loss.

Published in:

VLSI Circuits, 2004. Digest of Technical Papers. 2004 Symposium on

Date of Conference:

17-19 June 2004