Precoded waveshaping transmitter for a twisted pair which elimin

Details Precoded waveshaping transmitter for a twisted pair which elimin Precoded waveshaping transmitter for a twisted pair which elimin

1997-10-09

1999-11-30

Ghebretinsae, Temesghen

Pulse or digital communications

Transmitters

Antinoise or distortion

332107, H04L 2503

Patent

active

059955554

ABSTRACT:
A precoded waveshaping transmitter comprises a synchronous delay line circuit, a transmitter state machine and a differential current digital to analog converter. Through the provision of a plurality of precoded staggered time delayed data from the combination of the delay line circuit and transmitter state machine the DAC can provide a predetermined output. In a preferred implementation, a subharmonic frequency can be maintained at least 27dB below the fundamental frequency when the PWT is driven by an all ones Manchester encoded signal.

REFERENCES:
patent: 3609393 (1971-09-01), Yao
patent: 3745371 (1973-07-01), Suzuki
patent: 3757331 (1973-09-01), Moulton
patent: 3806807 (1974-04-01), Nakamura
patent: 4553213 (1985-11-01), Hyatt
patent: 5016263 (1991-05-01), Kitagawa et al.
patent: 5267269 (1993-11-01), Shih et al.
Schilling, D., and Belove, C., Electronic Circuits: Discrete and Integrated, 3.sup.rd Ed. New York: McGraw-Hill Book Company, 1989, pp. 734-745.

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