US 12,231,527 B2
Clock recovery training
Bhavesh Bhakta, Richardson, TX (US); Paul Marion Miller, IV, Farmers Branch, TX (US); and Mark Ryan Love, Dallas, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Jun. 22, 2021, as Appl. No. 17/354,752.
Prior Publication US 2022/0407674 A1, Dec. 22, 2022
Int. Cl. H04L 7/00 (2006.01); H04L 7/06 (2006.01); G06F 1/12 (2006.01)
CPC H04L 7/0012 (2013.01) [H04L 7/0037 (2013.01); H04L 7/06 (2013.01); G06F 1/12 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a clock generator configured to determine a sampling clock based on a received input clock and a clock offset;
a clock data recovery (CDR) circuit configured to:
determine a phase of the input clock; and
determine CDR codes based on the determined phase and sampled data;
logic configured to:
record a first CDR code of the CDR codes at a first time;
record a second CDR code of the CDR codes at a second time subsequent to the first time; and
determine a calibrated offset based on the first CDR code and the second CDR code; and
an adder configured to determine the clock offset according to the CDR codes and the calibrated offset.