A 7.5-Gb/s One-Tap-FFE Transmitter With Adaptive Far-End Crosstalk Cancellation Using Duty Cycle Detection

A 2.5-7.5-Gb/s transmitter with one-tap feed-forward equalizer (FFE) and adaptive far-end crosstalk (FEXT) cancellation is presented. To cancel the intersymbol interference, the one-tap FFE is also employed. A crosstalk canceller (XTC) is adapted to cancel FEXT by using inverse pulses. To cancel the...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2013-02, Vol.48 (2), p.391-404
Main Authors: KAO, Shih-Yuan, LIU, Shen-Iuan
Format: Article
Language:English
Subjects:
Adaptation coefficient
Applied sciences
Calibration
Circuit properties
Circuits of signal characteristics conditioning (including delay circuits)
Clocks
Crosstalk
crosstalk-induced jitter (CIJ)
Design. Technologies. Operation analysis. Testing
Detectors
Digital circuits
Electric, optical and optoelectronic circuits
Electronic circuits
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
far-end crosstalk (FEXT) cancellation
feed-forward equalizer (FFE)
Integrated circuits
intersymbol interference (ISI)
Microstrip
parallel interface
Receivers
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
transmitter
Transmitters
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Summary:A 2.5-7.5-Gb/s transmitter with one-tap feed-forward equalizer (FFE) and adaptive far-end crosstalk (FEXT) cancellation is presented. To cancel the intersymbol interference, the one-tap FFE is also employed. A crosstalk canceller (XTC) is adapted to cancel FEXT by using inverse pulses. To cancel the FEXT due to the coupled microstrip lines with various spacing, the pulse amplitude of the XTC is digitally controlled by using the proposed duty cycle detection. The one-tap FFE and the XTC are merged together to save the power. This adaptive transmitter is fabricated in a 65-nm CMOS technology. The maximum power consumption from a 1.2-V supply is 26.4 mW, and the core area occupies 0.0307 mm 2 . For two 5-in FR4 printed-circuit-board traces with the spacing of 8 mil, the measured rms and peak-to-peak jitters of the recovered data are improved by 10.01 and 48.9 ps, respectively, for a 7.5-Gb/s PRBS of 2 7 -1 . The measured calibration time of the XTC is 1.17 μs.
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2012.2227604