US 11,962,441 B2
Multi-tap decision feed-forward equalizer with precursor and postcursor taps
Chaitanya Palusa, San Jose, CA (US); Rob Abbott, Ontario (CA); Wei-Li Chen, Hsinchu (TW); Po-Hsiang Lan, Taipei (TW); Dirk Pfaff, Ontario (CA); and Cheng-Hsiang Hsieh, Taipei (TW)
Assigned to Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed by Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed on Jul. 25, 2022, as Appl. No. 17/814,641.
Application 17/814,641 is a continuation of application No. 17/164,325, filed on Feb. 1, 2021, granted, now 11,398,933.
Application 17/164,325 is a continuation of application No. 16/741,099, filed on Jan. 13, 2020, granted, now 10,911,272, issued on Feb. 2, 2021.
Claims priority of provisional application 62/799,316, filed on Jan. 31, 2019.
Prior Publication US 2022/0360476 A1, Nov. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 25/03 (2006.01); H03K 5/135 (2006.01); H04L 25/02 (2006.01); H04L 27/01 (2006.01); H03K 5/00 (2006.01)
CPC H04L 25/03878 (2013.01) [H03K 5/135 (2013.01); H04L 25/028 (2013.01); H04L 25/03038 (2013.01); H04L 25/03057 (2013.01); H04L 27/01 (2013.01); H03K 2005/00052 (2013.01); H03K 2005/00065 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
inputting a signal to a plurality of taps including precursor taps, a cursor tap, and post cursor taps;
delaying the signal at each of the plurality of taps by a delay amount to produce delayed signals;
providing, from an output of each of the plurality of taps, the delayed signals to corresponding tentative decision slicers;
quantizing the delayed signals with the tentative decision slicers to generate quantized sampled signals;
multiplying the quantized sampled signals with tap coefficients to reduce noise; and
combining the multiplied quantized sample signals to compensate precursor and postcursor inter-symbol interference.