An analog DFE for disk drives using a mixed-signal integrator
M.Q. Le, Paul J. Hurst, Kenneth C. Dyer · IEEE Journal of Solid-State Circuits · 1999
An analog adaptive decision-feedback equalizer (DFE) is described. The DFE cancels intersymbol interference using four feedback taps, and a fifth tap cancels dc offset. The coefficient for each tap is adapted using a small mixed-signal integrator. The DFE dissipates 220 mW at a data rate of 150 Mb/s. The active area is 1.8 mm/sup 2/ in a 1-/spl mu/m CMOS process.