Differential 4-tap and 7-tap Transverse Filters in SiGe for 10Gb/s Multimode Fiber Optic Link Equalization

H. Wu, J. Tierno, P. Pepeljugoski, J. Schaub, S. Gowda, J. Kash, and A. Hajimiri

Differential 4-tap and 7-tap transverse filters are designed in a 0.18 μm SiGe BiCMOS technology for equalization of 10Gb/s multimode fiber optic signals. The 7-tap equalizer reduced the ISI of a 10Gb/s signal received through 300m of 50 μm noncompliant next generation multimode fiber from 4.2dB to 0.8dB. The circuit dissipates 40mW from a 3.3V supply.