US 11,811,567 B1
Serial data receiver with decision feedback equalizer with feed forward technique
Battaje Vimalesh Rao, San Diego, CA (US); Jacob S. Schneider, San Diego, CA (US); and Mitesh D. Katakwar, Santa Clara, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Sep. 9, 2022, as Appl. No. 17/931,090.
Int. Cl. H04L 25/03 (2006.01)
CPC H04L 25/03038 (2013.01) [H04L 25/03057 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
an amplifier circuit configured to:
receive one or more signals that encode a serial data stream that includes a plurality of data symbols; and
perform a comparison of the one or more signals to a threshold value to generate a recovered data symbol; and
a threshold circuit configured to:
generate a delayed version of the one or more signals;
generate a delayed data symbol using the delayed version of the one or more signals; and
adjust the threshold value using the delayed data symbol.