US 12,074,623 B2
PAM-4 DFE architectures with symbol-transition dependent DFE tap values
Masum Hossain, Edmonton (CA); Nhat Nguyen, San Jose, CA (US); Yikui Jen Dong, Cupertino, CA (US); Arash Zargaran-Yazd, Sunnyvale, CA (US); and Wendemagegnehu Beyene, San Jose, CA (US)
Assigned to Rambus Inc., San Jose, CA (US)
Filed by Rambus Inc., San Jose, CA (US)
Filed on May 8, 2023, as Appl. No. 18/144,342.
Application 18/144,342 is a continuation of application No. 17/527,631, filed on Nov. 16, 2021, granted, now 11,683,057.
Application 17/527,631 is a continuation of application No. 17/114,782, filed on Dec. 8, 2020, granted, now 11,211,960, issued on Dec. 28, 2021.
Application 17/114,782 is a continuation of application No. 16/680,859, filed on Nov. 12, 2019, granted, now 10,892,791, issued on Jan. 12, 2021.
Application 16/680,859 is a continuation of application No. 15/755,255, granted, now 10,516,427, issued on Dec. 24, 2019, previously published as PCT/US2016/056542, filed on Oct. 12, 2016.
Claims priority of provisional application 62/351,557, filed on Jun. 17, 2016.
Claims priority of provisional application 62/248,461, filed on Oct. 30, 2015.
Claims priority of provisional application 62/242,196, filed on Oct. 15, 2015.
Prior Publication US 2023/0353177 A1, Nov. 2, 2023
Int. Cl. H04B 1/12 (2006.01); H04L 25/02 (2006.01); H04L 25/03 (2006.01); H04L 25/49 (2006.01); H04L 27/00 (2006.01); H04L 27/01 (2006.01); H04L 27/06 (2006.01)
CPC H04B 1/123 (2013.01) [H04B 1/12 (2013.01); H04L 25/0264 (2013.01); H04L 25/03057 (2013.01); H04L 25/03076 (2013.01); H04L 25/03133 (2013.01); H04L 25/4917 (2013.01); H04L 27/00 (2013.01); H04L 27/01 (2013.01); H04L 27/06 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A receiver, comprising:
an analog-to-digital converter to receive an analog input signal and to produce a first input digital sample for a first symbol period and a second input digital sample for a second symbol period where the second symbol period is immediately after the first symbol period;
a digital summer to receive the first input digital sample and to, based on the first input digital sample and a first digital error removal value, produce a first digital output value, the digital summer also to receive the second input digital sample and to, based on the second input digital sample and a second digital error removal value, produce a second digital output value; and
digital equalization to receive the first digital output value and the second digital output value to produce a first feed-forward and decision feedback equalized receiver output value based on the first digital output value, the second digital output value, and a second feed-forward and decision feedback equalized output value that was based on the first digital output value.