Gain-phase co-equalization for widely-used high-speed cables

Author

Hidaka, Yasuo ; Gai, Weixin ; Osone, Hideki ; Koyanagi, Yoichi ; Jiang, Jian Hong ; Horie, Takeshi

Author_Institution

Fujitsu Labs. of America Inc., Sunnyvale, CA, USA

fYear

2005

fDate

16-18 June 2005

Firstpage

194

Lastpage

197

Abstract

Based on observation that widely-used high-speed cables have minimum-phase-like characteristics, we developed a minimum-phase equalizer, which is optimal for such cables. An analog 2^nd-order derivative equalizer was employed, and our analysis showed positive coefficients are needed to make it minimum-phase. Since the equalizer is minimum-phase, phase is automatically equalized when gain is equalized enough. The equalizer was implemented in 0.11μm CMOS technology, and measurement showed BER < 10^-12 with a 40m AWG24 InfiniBand cable at 3.125Gbaud.

Keywords

CMOS analogue integrated circuits; FIR filters; cables (electric); equalisers; intersymbol interference; poles and zeros; 0.11 micron; 10GBASE-CX4; 40 m; CMOS; InfiniBand cable; analog derivative equalizer; gain phase coequalization; high-speed cables; intersymbol interference; minimum phase equalizer; pole-zero analysis; Bit error rate; CMOS technology; Communication cables; DSL; Equalizers; Finite impulse response filter; Frequency; Interference; Poles and zeros; Propagation delay;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits, 2005. Digest of Technical Papers. 2005 Symposium on

Print_ISBN

4-900784-01-X

Type

conf

DOI

10.1109/VLSIC.2005.1469365

Filename

1469365