Blind Adaptive Mixed-Signal DFE for Gb/s, Multi-Drop, Buses

Author

Fredriksson, Henrik ; Svensson, Christer

Author_Institution

Dept. of Electr. Eng., Linkoping Univ.

fYear

2006

fDate

26-28 April 2006

Firstpage

1

Lastpage

4

Abstract

This paper presents a mixed signal decision feedback equalizer (DFE) efficiently implementing sign-sign least-mean-square (SS-LMS) coefficient updating, offset estimation and compensation. The equalizer is designed for multi-drop buses and has 16 six bit fully programmable filter coefficients. The equalizer filter is implemented with a novel carry-save-DAC architecture eliminating the carry propagation limiting factor. Measurement results from a test chip are presented showing no transmission errors and good clock skew robustness when receiving data at 700 Mb/s over a heavily polluted channel. The test chip also includes bit error rate (BER) measurement circuits and equalized eye-chart extraction

Keywords

adaptive equalisers; blind equalisers; decision feedback equalisers; digital-analogue conversion; error statistics; least mean squares methods; 700 Mbit/s; bit error rate; blind adaptive decision feedback equalizer; carry-save-DAC architecture; clock skew robustness; equalizer filter; mixed signal decision feedback equalizer; multidrop buses; offset compensation; offset estimation; sign-sign least-mean-square coefficient updating; Bit error rate; Circuit testing; Clocks; Decision feedback equalizers; Finite impulse response filter; Intersymbol interference; Pollution measurement; Reflection; Robustness; Semiconductor device measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Design, Automation and Test, 2006 International Symposium on

Conference_Location

Hsinchu

Print_ISBN

1-4244-0179-8

Electronic_ISBN

1-4244-0180-1

Type

conf

DOI

10.1109/VDAT.2006.258165

Filename

4027537