DocumentCode :
3471833
Title :
An 80 Mb/s adaptive DFE detector in 1 /spl mu/m CMOS [hard-disk drives]
Author :
Brown, J. ; Hurst, P. ; Rothenberg, B. ; Lewis, S.
Author_Institution :
Solid-State Circuits Res. Lab., California Univ., Davis, CA, USA
fYear :
1997
fDate :
8-8 Feb. 1997
Firstpage :
324
Lastpage :
325
Abstract :
This paper describes a continuous-time forward equalizer (CTFE) with one adaptive right-half-plane zero that removes the precursor ISI and an adaptive RAM DFE that removes the postcursor ISI. Because the DFE cancels post-cursor ISI noiselessly, the post-cursor ISI cancellation does not degrade the signal-to-noise ratio. The prototype also includes a 7th-order linear-phase low-pass ladder filter to provide anti-aliasing and to suppress channel noise. The key contribution here is the implementation of this adaptive one-zero forward equalizer in conjunction with the low-pass filter and adaptive mixed-signal RAMDFE on the same IC. Because two continuous-time outputs from the low-pass filter are combined to build the core of the adaptive forward equalizer, it is constructed with little hardware beyond that already required for the low-pass filter.
Keywords :
CMOS digital integrated circuits; active filters; adaptive equalisers; antialiasing; decision feedback equalisers; delay circuits; hard discs; intersymbol interference; ladder filters; low-pass filters; 1 micron; 80 Mbit/s; CMOS; adaptive DFE detector; adaptive right-half-plane zero; anti-aliasing; channel noise; continuous-time forward equalizer; hard-disk drives; linear-phase low-pass ladder filter; one-zero forward equalizer; postcursor ISI; precursor ISI; signal-to-noise ratio; Adaptive filters; Decision feedback equalizers; Degradation; Detectors; Hard disks; Intersymbol interference; Low pass filters; Noise cancellation; Prototypes; Signal to noise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid-State Circuits Conference, 1997. Digest of Technical Papers. 43rd ISSCC., 1997 IEEE International
Conference_Location :
San Francisco, CA, USA
ISSN :
0193-6530
Print_ISBN :
0-7803-3721-2
Type :
conf
DOI :
10.1109/ISSCC.1997.585403
Filename :
585403
Link To Document :
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