US 11,870,612 B2
Method of adaptive termination calibration
Huimin Chen, Beaverton, OR (US); Naveed Khan, Folsom, CA (US); and Tony L Lewis, Hillsboro, OR (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Mar. 26, 2020, as Appl. No. 16/831,650.
Prior Publication US 2020/0228375 A1, Jul. 16, 2020
Int. Cl. H04L 25/03 (2006.01); H04L 25/02 (2006.01)
CPC H04L 25/0298 (2013.01) [H04L 25/0278 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for calibrating termination resistors for a communication link including a transmitter coupled to a receiver via a channel, the transmitter having an adjustable transmit termination resister (Rtx) and the receiver having an adjustable receiver termination resister (Rrx), the method comprising:
in conjunction with link training for the communication link,
using a first calibration process to calibrate a resistance value for the Rrx under which a resistance value of the Rrx is adjusted to obtain a maximum peak amplitude of a signal received at the receiver during transmission of a link training pattern.