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A Dual-Channel 23-Gbps CMOS Transmitter/Receiver Chipset for 40-Gbps RZ-DQPSK and CS-RZ-DQPSK Optical Transmission

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15 Author(s)
Delong Cui ; Broadcom Corp., Irvine, CA, USA ; Raghavan, B. ; Singh, U. ; Vasani, A.
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This paper describes a dual-channel 23 (20 to 27) Gbps chipset designed in a 40-nm CMOS process for 40 Gbps differential quadrature phase-shift keying (DQPSK) optical transmission. The transmitter has a 2-tap FIR filter and generates two channels of full-rate data. Data outputs exhibit 10 ps rise/fall times, 0.2 psrms RJ, 0.8 pspp DJ, and a ±0.5 UI skew adjustment relative to the full-rate and half-rate clock outputs. The receiver has two 20-27-Gbps input channels, with each channel including a peaking filter, decision threshold adjustment, and 1-tap loop-unrolled DFE. It achieves a 7- mVppd input sensitivity and a 0.7-UIpp high-frequency jitter tolerance. The transmitter and receiver dissipate 0.63 and 1.2 W, respectively.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:47 ,  Issue: 12 )

Date of Publication:

Dec. 2012

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