Digital equalizer for high speed communication channels

Details Digital equalizer for high speed communication channels Digital equalizer for high speed communication channels

1980-11-14

1983-02-15

Malzahn, David H.

Boots, shoes, and leggings

G06F 1531

Patent

active

043744265

ABSTRACT:
A high speed digital equalizer provides a means for replacing the conventional transversal filter used to preset equalize a channel with simple digital circuits prior to data transmission. In particular, the analog to digital converter and digital multipliers of a transversal filter are replaced with a digital to analog converter and random access memory, respectively, which permits equalizers to be used with band limited channels operating at much higher data rates than previously possible because of sample rate limitations.

REFERENCES:
patent: 3777130 (1973-12-01), Croisier et al.
patent: 3906400 (1975-09-01), Gooding et al.
patent: 3914588 (1975-10-01), Nussbaumer
patent: 3987288 (1976-10-01), Franks
Tubiana, "Digital Filter", IBM Tech. Disclosure Bulletin, vol. 17, No. 9, Feb. 1975, pp. 2656-2658.
Schroder, "High Word-Rate Digital Filters With Programmable Table Lookup", IEEE Trans. on Circuits & Systems, May 1977, pp. 277-279.
DeMan et al., "High Speed NMOS Circuits for ROM-Accumulator and Multiplier Type Digital Filters", IEEE Journal of Solid-State Circuits, Oct. 1978, pp. 565-572.

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