A 3-tap digitally programmable transversal filter in 90 nm CMOS for equalization up to 30 Gb/s

Author

Sewter, Jonathan ; Carusone, Anthony Chan ; Rogers, Edward S.

Author_Institution

Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada

fYear

2005

fDate

16-18 June 2005

Firstpage

190

Lastpage

193

Abstract

This paper describes a fully-differential 3-tap transversal filter in 90 nm CMOS capable of equalizing NRZ data up to 30 Gb/s. A traditional traveling wave filter structure is modified to increase the filter´s bandwidth. Digital programmability is provided for the tap gains, an integrated pre-amplifier, and tuning varactors. The design is 600 μm × 500 μm and draws 25 mA from a 1 V supply. It is the first reported CMOS transversal filter operating above 10 Gb/s.

Keywords

CMOS digital integrated circuits; decision feedback equalisers; preamplifiers; programmable filters; transversal filters; varactors; 1 V; 25 mA; 3-tap transversal filter; 30 Gbit/s; 500 micron; 600 micron; 90 nm; CMOS; digitally programmable transversal filter; equalization; integrated pre-amplifier; tap gain; traveling wave filter; tuning varactor; Bandwidth; Delay; Distributed parameter circuits; Optical fiber filters; Optical signal processing; Parasitic capacitance; Power transmission lines; Silicon germanium; Topology; Transversal filters;

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.2005.1469364

Filename

1469364