Pulse-width modulation pre-emphasis applied in a wireline transmitter, achieving 33 dB loss compensation at 5-Gb/s in 0.13-μm CMOS
In: 2005 Symposium on VLSI CircuitsIEEE journal of solid-state circuits 41(4):990-999; Jg. 41 (2006) 4, S. 990-999
Online
Konferenz
- print, 11 ref
Zugriff:
A transmitter pre-emphasis technique for copper cable equalization is presented that is based on pulse-width modulation (PWM). This technique is an alternative to the usual 2-tap symbol-spaced FIR (SSF) pre-emphasis. The technique uses timing resolution instead of amplitude resolution to adjust the filter transfer function, and therefore fits well with future high-speed low-voltage CMOS processes. Spectral analysis and time domain simulations illustrate that PWM pre-emphasis offers more relative high frequency boost than 2-tap SSF. Only one coefficient needs to be set to fit the equalizer transfer function to the channel, which makes convergence of an algorithm for automatic adaptation straightforward. A proof-of-concept 0.13-μm CMOS transmitter achieves in excess of 5 Gb/s (2-PAM) over 25 m of standard RG-58U low-end coaxial copper cable with 33 dB of channel loss at the Nyquist frequency (2.5 GHz). Measured BER at this speed and channel loss is < 10-12.
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Pulse-width modulation pre-emphasis applied in a wireline transmitter, achieving 33 dB loss compensation at 5-Gb/s in 0.13-μm CMOS
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Autor/in / Beteiligte Person: | SCHRADER, Jan-Rutger ; KLUMPERINK, Eric A. M ; VISSCHERS, Jan L ; NAUTA, Bram |
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Quelle: | 2005 Symposium on VLSI CircuitsIEEE journal of solid-state circuits 41(4):990-999; Jg. 41 (2006) 4, S. 990-999 |
Veröffentlichung: | New York, NY: Institute of Electrical and Electronics Engineers, 2006 |
Medientyp: | Konferenz |
Umfang: | print, 11 ref |
ISSN: | 0018-9200 (print) |
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