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

Volume

32

Issue

5

fYear

1997

fDate

5/1/1997 12:00:00 AM

Firstpage

713

Lastpage

721

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;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.568840

Filename

568840