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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
| Content Provider | Semantic Scholar |
|---|---|
| Author | Schrader, J. H. R. Klumperink, Eric A. M. Visschers, Jan L. Nauta, Bram |
| Copyright Year | 2006 |
| Abstract | 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 . |
| Starting Page | 990 |
| Ending Page | 999 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| Volume Number | 41 |
| Alternate Webpage(s) | https://ris.utwente.nl/ws/portalfiles/portal/6430534/pulse-width.pdf |
| Journal | VLSIC 2006 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
