Patent Number: 6,298,362

Title: Apparatus and method for equalizer filter units responsive to 5-level inputs signals

Abstract: In a transceiver unit in which the information is encoded in a plurality of levels, a update unit for an adaptive or equalizer filter unit includes apparatus (51-56) for forming product of error signals and data signals without using a multiplier unit. The plurality of levels is represented by a logic signal format (b.sub.2, b.sub.1, b.sub.0) for five signal levels. The components of the logic signal format (b.sub.2, b.sub.1, b.sub.0) provide the control signals which process the error signals in such a manner as to provide the appropriate product. The only arithmetic unit is an adder unit (56) needed to combine the previous coefficient W.sub.n,t-1 with the product generated by the apparatus (51-56).

Inventors: Gu; Richard X. (Dallas, TX)

Assignee: Texas Instruments Incorporated

International Classification: H03H 21/00 (20060101); H04L 25/03 (20060101); G06F 017/10 ()

Expiration Date: 10/02/2018