Transmitter equalization method and apparatus

Details Transmitter equalization method and apparatus Transmitter equalization method and apparatus

2006-02-07

2006-02-07

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

C333S020000, C333S02800T

Reexamination Certificate

active

06995627

ABSTRACT:
A current mode output driver includes a pre-driver for pre-equalization. The current mode output driver drives a transmission line with an alternating current (AC) signal and a direct current (DC) signal. Characteristics of the transmission line are measured by comparing a received amplitude of the AC signal and a received amplitude of the DC signal. A ratio of the AC received amplitude to the DC received amplitude is compared to ratios derived from possible equalization settings to determine an equalization setting appropriate to equalize the channel.

REFERENCES:
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patent: 6512789 (2003-01-01), Mirfakhraei
patent: 6614296 (2003-09-01), Casper
patent: 6724329 (2004-04-01), Casper
Farjad-Rad, R., “A 0.4-μm CMOS 10-Gb/s 4-PAM Pre-Emphasis Serial Link Transmitter”,IEEE Journal of Solid-State Circuits, 34 (5), (May 1999), pp. 580-585.

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