Title :
A 100 Mb/s BiCMOS adaptive pulse-shaping filter
Author :
Shoval, Ayal ; Snelgrove, W. Martin ; Johns, David A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
fDate :
12/1/1995 12:00:00 AM
Abstract :
With the growing demand for high-speed transmission of digital data, there is a challenge for utilizing the existing copper plant as the transmission medium, especially for short-hop links. This medium offers a lower cost to a fiber medium, but requires more sophisticated electronics to account for electromagnetic emissions, cross-talk, and cable loss. These include pulse shaping filters, cross-talk cancelers, and equalizers. To maintain system cost at a minimum, analog solutions are preferred. A continuous-time tunable biquad implemented in a 0.8 μm BiCMOS process and configured as an adaptive pulse-shaping filter is described. The biquad is tunable over the range 10-230 MHz with variable Q factors. It is composed of five transconductance-C integrators each dissipating a static power of 10 mW at 5 V. A method for adapting the filter´s pole-frequency and Q-factor while servicing 100 Mb/s NRZ data is presented together with experimental results
Keywords :
BiCMOS analogue integrated circuits; Q-factor; VHF filters; adaptive filters; biquadratic filters; continuous time filters; data communication equipment; digital communication; poles and zeros; pulse shaping circuits; telecommunication equipment; 0.8 μm BiCMOS process; 0.8 micron; 10 mW; 10 to 230 MHz; 100 Mb/s BiCMOS adaptive pulse-shaping filter; 100 Mbit/s; 5 V; NRZ data; Q factors; continuous-time tunable biquad; digital data; high-speed transmission; pole-frequency; static power; transconductance-C integrators; Adaptive filters; BiCMOS integrated circuits; Copper; Costs; Equalizers; Integrated circuit technology; Magnetic separation; Pulse shaping methods; Q factor; Signal processing algorithms;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
