Title :
A mixed-signal RAM decision-feedback equalizer for disk drives
Author :
Rothenberg, Bret C. ; Brown, James E C ; Hurst, Paul J. ; Lewis, Stephen H.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA
fDate :
5/1/1997 12:00:00 AM
Abstract :
A mixed-signal RAM decision-feedback equalizer (DFE) that operates at 90 Mb/s is described. In the analog domain, the DFE subtracts intersymbol interference caused by the past four outputs. The equalized signal is fed into a nonuniform flash analog-to-digital converter (ADC) to produce the decision output and error signal used to adapt the RAM contents in the digital domain. With a 5 V supply voltage, the power dissipation is 260 mW during steady-state operation. The active area is 4.5 mm2 in a 1 μm CMOS process
Keywords :
CMOS integrated circuits; adaptive equalisers; decision feedback equalisers; digital magnetic recording; hard discs; interference suppression; intersymbol interference; mixed analogue-digital integrated circuits; random-access storage; table lookup; 1 micron; 260 mW; 5 V; 90 Mbit/s; CMOS process; ISI subtraction; analog-to-digital converter; decision-feedback equalizer; disk drives; error signal; intersymbol interference; mixed-signal RAM DFE; nonuniform flash ADC; Adaptive equalizers; Analog-digital conversion; CMOS process; Decision feedback equalizers; Disk drives; Finite impulse response filter; Intersymbol interference; Maximum likelihood detection; Maximum likelihood estimation; Power dissipation;
Journal_Title :
Solid-State Circuits, IEEE Journal of
