Title :
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
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 2nd-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;
Conference_Titel :
VLSI Circuits, 2005. Digest of Technical Papers. 2005 Symposium on
Print_ISBN :
4-900784-01-X
DOI :
10.1109/VLSIC.2005.1469365
