US 11,835,576 B2
Compensating for signal loss at a printed circuit board
Bhyrav M. Mutnury, Austin, TX (US); and Sandor Farkas, Round Rock, TX (US)
Assigned to Dell Products L.P., Round Rock, TX (US)
Filed by Dell Products L.P., Round Rock, TX (US)
Filed on Jan. 13, 2022, as Appl. No. 17/647,857.
Prior Publication US 2023/0221367 A1, Jul. 13, 2023
Int. Cl. G01R 31/28 (2006.01); G01R 31/317 (2006.01); G06F 11/07 (2006.01)
CPC G01R 31/3171 (2013.01) [G06F 11/076 (2013.01); G06F 11/0745 (2013.01); G06F 11/0793 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of compensating for signal loss, the method comprising:
determining a first expected loss at a first frequency at a receiver associated with a first lane of a printed circuit board (PCB);
determining a second expected loss at a second frequency at the receiver associated with the first lane of the PCB;
calculating an expected rate of change of signal loss between the first frequency and the second frequency based on the first expected loss and the second expected loss;
calculating a first measured loss of a first signal transmitted at the first frequency from a transmitter to the receiver along the first lane of the PCB;
calculating a second measured loss of a second signal transmitted at the second frequency from the transmitter to the receiver along the first lane of the PCB;
calculating a measured rate of change of signal loss between the first frequency and the second frequency based on the first measured loss and the second measured loss;
comparing the measured rate of change of signal loss with the expected rate of change of signal loss; and
compensating, based on the comparison, a gain of a particular signal transmitted from the transmitter to the receiver.